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  • Access database Need to prevent from approving overlapping OT.Second Try with modified request Not a programmer [on hold]

    - by user2512764
    Employees Signups on company Website for advance overtime line. Access table already has overtime signups which does not require user to add the time but it requires only to add location as approved. Since this table has field Employee name, Date, start time and End time and location, All the fields has the data except for location. In the data base I have created a form based on this table. Since the table already have most of the information User only has to add location in the form field in order to approve overtime. Once user approves an overtime line for example: User approves overtime for employee name 'John' which starts on 7/1/2013 at 0400-0800, location is successfully added. When user tries to add location for John again which might has the start time for 7/1/2013 at 0600=0900. Again we are not entering Start time, End time and date it is already in the table. we are only entering location as approval. Soon user enters the location for John in the form field, since there is a conflict with previously overtime line which has already been approved. program needs to check employee name, date and time in previously approved (Added location) overtime line and The location in current record needs to be deleted and go to next record. I hope I have explained it in understandable format. Thank You,

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  • Error Handling Examples(C#)

    “The purpose of reviewing the Error Handling code is to assure that the application fails safely under all possible error conditions, expected and unexpected. No sensitive information is presented to the user when an error occurs.” (OWASP, 2011) No Error Handling The absence of error handling is still a form of error handling. Based on the code in Figure 1, if an error occurred and was not handled within either the ReadXml or BuildRequest methods the error would bubble up to the Search method. Since this method does not handle any acceptations the error will then bubble up the stack trace. If this continues and the error is not handled within the application then the environment in which the application is running will notify the user running the application that an error occurred based on what type of application. Figure 1: No Error Handling public DataSet Search(string searchTerm, int resultCount) { DataSet dt = new DataSet(); dt.ReadXml(BuildRequest(searchTerm, resultCount)); return dt; } Generic Error Handling One simple way to add error handling is to catch all errors by default. If you examine the code in Figure 2, you will see a try-catch block. On April 6th 2010 Louis Lazaris clearly describes a Try Catch statement by defining both the Try and Catch aspects of the statement. “The try portion is where you would put any code that might throw an error. In other words, all significant code should go in the try section. The catch section will also hold code, but that section is not vital to the running of the application. So, if you removed the try-catch statement altogether, the section of code inside the try part would still be the same, but all the code inside the catch would be removed.” (Lazaris, 2010) He also states that all errors that occur in the try section cause it to stops the execution of the try section and redirects all execution to the catch section. The catch section receives an object containing information about the error that occurred so that they system can gracefully handle the error properly. When errors occur they commonly log them in some form. This form could be an email, database entry, web service call, log file, or just an error massage displayed to the user.  Depending on the error sometimes applications can recover, while others force an application to close. Figure 2: Generic Error Handling public DataSet Search(string searchTerm, int resultCount) { DataSet dt = new DataSet(); try { dt.ReadXml(BuildRequest(searchTerm, resultCount)); } catch (Exception ex) { // Handle all Exceptions } return dt; } Error Specific Error Handling Like the Generic Error Handling, Error Specific error handling allows for the catching of specific known errors that may occur. For example wrapping a try catch statement around a soap web service call would allow the application to handle any error that was generated by the soap web service. Now, if the systems wanted to send a message to the web service provider every time a soap error occurred but did not want to notify them if any other type of error occurred like a network time out issue. This would be varying tedious to accomplish using the General Error Handling methodology. This brings us to the use case for using the Error Specific error handling methodology.  The Error Specific Error handling methodology allows for the TryCatch statement to catch various types of errors depending on the type of error that occurred. In Figure 3, the code attempts to handle DataException differently compared to how it potentially handles all other errors. This allows for specific error handling for each type of known error, and still allows for error handling of any unknown error that my occur during the execution of the TryCatch statement. Figure 5: Error Specific Error Handling public DataSet Search(string searchTerm, int resultCount) { DataSet dt = new DataSet(); try { dt.ReadXml(BuildRequest(searchTerm, resultCount)); } catch (TimeoutException ex) { // Handle Timeout TimeoutException Only } catch (Exception) { // Handle all Exceptions } return dt; }

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  • Where to get NCover from?

    - by Try
    Hi - I realise NCover has gone commercial. I am looking for teh free version. Where do i get the latest free version of NCover? The NCover website only talks about a trial version of the commercial product, not the free version.

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  • Subterranean IL: Exception handling 1

    - by Simon Cooper
    Today, I'll be starting a look at the Structured Exception Handling mechanism within the CLR. Exception handling is quite a complicated business, and, as a result, the rules governing exception handling clauses in IL are quite strict; you need to be careful when writing exception clauses in IL. Exception handlers Exception handlers are specified using a .try clause within a method definition. .try <TryStartLabel> to <TryEndLabel> <HandlerType> handler <HandlerStartLabel> to <HandlerEndLabel> As an example, a basic try/catch block would be specified like so: TryBlockStart: // ... leave.s CatchBlockEndTryBlockEnd:CatchBlockStart: // at the start of a catch block, the exception thrown is on the stack callvirt instance string [mscorlib]System.Object::ToString() call void [mscorlib]System.Console::WriteLine(string) leave.s CatchBlockEnd CatchBlockEnd: // method code continues... .try TryBlockStart to TryBlockEnd catch [mscorlib]System.Exception handler CatchBlockStart to CatchBlockEnd There are four different types of handler that can be specified: catch <TypeToken> This is the standard exception catch clause; you specify the object type that you want to catch (for example, [mscorlib]System.ArgumentException). Any object can be thrown as an exception, although Microsoft recommend that only classes derived from System.Exception are thrown as exceptions. filter <FilterLabel> A filter block allows you to provide custom logic to determine if a handler block should be run. This functionality is exposed in VB, but not in C#. finally A finally block executes when the try block exits, regardless of whether an exception was thrown or not. fault This is similar to a finally block, but a fault block executes only if an exception was thrown. This is not exposed in VB or C#. You can specify multiple catch or filter handling blocks in each .try, but fault and finally handlers must have their own .try clause. We'll look into why this is in later posts. Scoped exception handlers The .try syntax is quite tricky to use; it requires multiple labels, and you've got to be careful to keep separate the different exception handling sections. However, starting from .NET 2, IL allows you to use scope blocks to specify exception handlers instead. Using this syntax, the example above can be written like so: .try { // ... leave.s EndSEH}catch [mscorlib]System.Exception { callvirt instance string [mscorlib]System.Object::ToString() call void [mscorlib]System.Console::WriteLine(string) leave.s EndSEH}EndSEH:// method code continues... As you can see, this is much easier to write (and read!) than a stand-alone .try clause. Next time, I'll be looking at some of the restrictions imposed by SEH on control flow, and how the C# compiler generated exception handling clauses.

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  • I didn't mean to become a database developer, but now I am. Should I stop or try to get better?

    - by pretlow majette
    20 years ago I couldn't afford even a cheap POS program when I opened my first surf shop in the Virgin Islands. I bought a copy of Paradox (remember that?) in 1990 and spent months in a back room scratching out a POS application. Over many iterations, including a switch to Access (2000)/SQL Server (2003), I built a POS and backoffice solution that runs four stores with multiple cash registers, a warehouse and office. Until recently, all my stores were connected to the same LAN (in a small shopping center) and performance wasn't an issue. Now that we've opened a location in the States that's changed. Connecting to my local server via the internet has slowed that locations application to a crawl. This is partly due to the slow and crappy dsl service we have in the Virgin Islands, and partly due to my less-than-professional code and sql. With other far-away stores in the works, I need a better solution. I like my application. My staff knows it well, and I'm not inclined to take on the expense of a proper commercial solution. So where does that leave me? I should probably host my sql online to sidestep the slow dsl here. I think I can handle cleaning up my SQL querries to speed that up a bit. What about Access? My version seems so old, but I don't like the newer versions with the 'ribbon'. There are so many options... Should I be learning Visual Studio with an eye on moving completely to the web? Will my VBA skills help me at all there? I don't have the luxury of a year at the keyboard to figure it out anymore. What about dotnetnuke, sharepoint, or lightswitch? They all seem like possibilities, but even understanding their capabilities is daunting. I'm pretty deep into it, but maybe I should bail and hire a consultant or programmer. That sounds expensive tho, and there's no guarantee there either... Any advice would be greatly appreciated. Or, if anybody is interested in buying a small chain of surf shops...

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  • I try install dhcp3-server, but /etc/init.d/dhcp3-server file is missing. Whats going on?

    - by hydroparadise
    I've found several how-to's that essentially go through the same process in setting up DHCP. Here's a link that has the list of step needed install and setup DHCP. I follow all the steps and find that the sudo /etc/init.d/dhcp3-server restart portion returns command not found only to reveal the the file doesn't even exist. I've installed (sudo apt-get install dhcp3-server) and uninstalled (sudo apt-get remove dhcp3-server) two or three times. I'm pretty sure my config files are good because I've had to check them three times. But I don't think I'm to that point of being able to see them action it. I cant control the process. Why is the file missing? How is it supposed to get there? Help?

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  • .NET and C# Exceptions. What is it reasonable to catch.

    - by djna
    Disclaimer, I'm from a Java background. I don't do much C#. There's a great deal of transfer between the two worlds, but of course there are differences and one is in the way Exceptions tend to be thought about. I recently answered a C# question suggesting that under some circstances it's reasonable to do this: try { some work } catch (Exeption e) { commonExceptionHandler(); } (The reasons why are immaterial). I got a response that I don't quite understand: until .NET 4.0, it's very bad to catch Exception. It means you catch various low-level fatal errors and so disguise bugs. It also means that in the event of some kind of corruption that triggers such an exception, any open finally blocks on the stack will be executed, so even if the callExceptionReporter fuunction tries to log and quit, it may not even get to that point (the finally blocks may throw again, or cause more corruption, or delete something important from the disk or database). May I'm more confused than I realise, but I don't agree with some of that. Please would other folks comment. I understand that there are many low level Exceptions we don't want to swallow. My commonExceptionHandler() function could reasonably rethrow those. This seems consistent with this answer to a related question. Which does say "Depending on your context it can be acceptable to use catch(...), providing the exception is re-thrown." So I conclude using catch (Exception ) is not always evil, silently swallowing certain exceptions is. The phrase "Until .NET 4 it is very bad to Catch Exception" What changes in .NET 4? IS this a reference to AggregateException, which may give us some new things to do with exceptions we catch, but I don't think changes the fundamental "don't swallow" rule. The next phrase really bothers be. Can this be right? It also means that in the event of some kind of corruption that triggers such an exception, any open finally blocks on the stack will be executed (the finally blocks may throw again, or cause more corruption, or delete something important from the disk or database) My understanding is that if some low level code had lowLevelMethod() { try { lowestLevelMethod(); } finally { some really important stuff } } and in my code I call lowLevel(); try { lowLevel() } catch (Exception e) { exception handling and maybe rethrowing } Whether or not I catch Exception this has no effect whatever on the excution of the finally block. By the time we leave lowLevelMethod() the finally has already run. If the finally is going to do any of the bad things, such as corrupt my disk, then it will do so. My catching the Exception made no difference. If It reaches my Exception block I need to do the right thing, but I can't be the cause of dmis-executing finallys

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  • Uninstalled Ubuntu, no GRLDR?

    - by user32965
    So I'm a big fat idiot. I installed Ubuntu 11.04 on my school's laptop, and here's come the time that I have to turn it back in. I wrote GRUB to the Master Boot Record, thinking it wasn't going to be permanent. So, fast forward to yesterday. I decided to hell with this, and popped in my Windows 7 CD, deleted the whole partition, formatted to NTFS, and installed Windows 7 on it. I'm surfing the web and my computer overheats [totally typical] I boot up, and get this: Try (hd0,0): FAT32: No GRLDR Try (hd0,1): invalid or null Try (hd0,2): invalid or null Try (hd0,3): invalid or null Try (hd1,0): NTFS5: No grldr Try (hd1,1): invalid or null Try (hd1,2): invalid or null Try (hd1,3): invalid or null Cannot find GRLDR. Press space bar to hold the screen, any other key to boot previous MBR... Timeout: 5 The timeout part just counts down to 0 from 5. I need to turn in this thing before tomorrow, please please please can someone help me out?

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  • Using PHP's exec() function (or the likes), how can you display terminal error output?

    - by Miciah Amberong
    Previous Reference I am just wondering if there's a way (using PHP) to output the compile error information from the terminal to the browser? For example: If you use this code to execute in the terminal... gcc -o try try.c ...and assuming the "try.c" have some errors. The terminal will output something like this: try.c In function 'main': try.c:27 'x' undeclared (first use in this function) try.c:27 (Each undeclared identifier is reported only once try.c:27 for each function it appears in.) Meanwhile, using this PHP code... <?php exec("gcc -o try try.c"); ?> The browser does not return any output like the terminal does. Is there a possible way direct or indirect that the error details that the terminal showed can be passed to the be displayed on a browser? Thank you very much.

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  • Delphi Editbox causing unexplainable errors...

    - by NeoNMD
    On a form I have 8 edit boxes that I do the exact same thing with. They are arranged in 2 sets of 4, one is Upper and the other is Lower. I kept getting errors clearing all the edit boxes so I went through clearing them 1 by 1 and found that 1 of the edit boxes just didnt work and when I tried to run the program and change that exit box it caused the debugger to jump to a point in the code with the database (even though the edit boxes had nothing to do with the database and they arent in a procedure or stack with a database in it) and say the program has access violation there. So I then removed all mention of that edit box and the code worked perfectly again, so I deleted that edit box, copied and pasted another edit box and left all values the same, then went through my code and copied the code from the other sections and simply renamed it for the new Edit box and it STILL causes an error even though it is entirely new. I cannot figure it out so I ask you all, what the hell? The editbox in question is "Edit1" unit DefinitionCoreV2; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, SQLiteTable3, StdCtrls; type TDefinitionFrm = class(TForm) GrpCompetition: TGroupBox; CmbCompSele: TComboBox; BtnCompetitionAdd: TButton; BtnCompetitionUpdate: TButton; BtnCompetitionRevert: TButton; GrpCompetitionDetails: TGroupBox; LblCompetitionIDTitle: TLabel; EdtCompID: TEdit; LblCompetitionDescriptionTitle: TLabel; EdtCompDesc: TEdit; LblCompetitionNotesTitle: TLabel; EdtCompNote: TEdit; LblCompetitionLocationTitle: TLabel; EdtCompLoca: TEdit; BtnCompetitionDelete: TButton; GrpSection: TGroupBox; LblSectionID: TLabel; LblGender: TLabel; LblAge: TLabel; LblLevel: TLabel; LblWeight: TLabel; LblType: TLabel; LblHeight: TLabel; LblCompetitionID: TLabel; BtnSectionAdd: TButton; EdtSectionID: TEdit; CmbGender: TComboBox; BtnSectionUpdate: TButton; BtnSectionRevert: TButton; CmbAgeRange: TComboBox; CmbLevelRange: TComboBox; CmbType: TComboBox; CmbWeightRange: TComboBox; CmbHeightRange: TComboBox; EdtSectCompetitionID: TEdit; BtnSectionDelete: TButton; GrpSectionDetails: TGroupBox; EdtLowerAge: TEdit; EdtLowerWeight: TEdit; EdtLowerHeight: TEdit; EdtUpperAge: TEdit; EdtUpperLevel: TEdit; EdtUpperWeight: TEdit; EdtUpperHeight: TEdit; LblAgeRule: TLabel; LblLevelRule: TLabel; LblWeightRule: TLabel; LblHeightRule: TLabel; LblCompetitionSelect: TLabel; LblSectionSelect: TLabel; CmbSectSele: TComboBox; Edit1: TEdit; procedure FormCreate(Sender: TObject); procedure BtnCompetitionAddClick(Sender: TObject); procedure CmbCompSeleChange(Sender: TObject); procedure BtnCompetitionUpdateClick(Sender: TObject); procedure BtnCompetitionRevertClick(Sender: TObject); procedure BtnCompetitionDeleteClick(Sender: TObject); procedure CmbSectSeleChange(Sender: TObject); procedure BtnSectionAddClick(Sender: TObject); procedure BtnSectionUpdateClick(Sender: TObject); procedure BtnSectionRevertClick(Sender: TObject); procedure BtnSectionDeleteClick(Sender: TObject); procedure CmbAgeRangeChange(Sender: TObject); procedure CmbLevelRangeChange(Sender: TObject); procedure CmbWeightRangeChange(Sender: TObject); procedure CmbHeightRangeChange(Sender: TObject); private procedure UpdateCmbCompSele; procedure AddComp; procedure RevertComp; procedure AddSect; procedure RevertSect; procedure UpdateCmbSectSele; procedure ClearSect; { Private declarations } public { Public declarations } end; var DefinitionFrm: TDefinitionFrm; implementation {$R *.dfm} procedure TDefinitionFrm.UpdateCmbCompSele; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; sCompTitle : string; bNext : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM CompetitionTable'); try CmbCompSele.Items.Clear; Repeat begin sCompTitle:=sltb.FieldAsString(sltb.FieldIndex['CompetitionID'])+':'+sltb.FieldAsString(sltb.FieldIndex['Description']); CmbCompSele.Items.Add(sCompTitle); bNext := sltb.Next; end; Until sltb.EOF; finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.UpdateCmbSectSele; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; sSQL : string; sSectTitle : string; bNext : boolean; bLast : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE CompetitionID = '+EdtCompID.text); If sltb.RowCount =0 then begin sltb := slDb.GetTable('SELECT * FROM SectionTable'); bLast:= sltb.MoveLast; sSQL := 'INSERT INTO SectionTable(SectionID,CompetitionID,Gender,Type) VALUES ('+IntToStr(sltb.FieldAsInteger(sltb.FieldIndex['SectionID'])+1)+','+EdtCompID.text+',1,1)'; sldb.ExecSQL(sSQL); sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE CompetitionID = '+EdtCompID.text); end; try CmbSectSele.Items.Clear; Repeat begin sSectTitle:=sltb.FieldAsString(sltb.FieldIndex['SectionID'])+':'+sltb.FieldAsString(sltb.FieldIndex['Type'])+':'+sltb.FieldAsString(sltb.FieldIndex['Gender'])+':'+sltb.FieldAsString(sltb.FieldIndex['Age'])+':'+sltb.FieldAsString(sltb.FieldIndex['Level'])+':'+sltb.FieldAsString(sltb.FieldIndex['Weight'])+':'+sltb.FieldAsString(sltb.FieldIndex['Height']); CmbSectSele.Items.Add(sSectTitle); //CmbType.Items.Strings[sltb.FieldAsInteger(sltb.FieldIndex['Type'])] Works but has logic errors bNext := sltb.Next; end; Until sltb.EOF; finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.AddComp; var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; bLast : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM CompetitionTable'); try bLast:= sltb.MoveLast; sSQL := 'INSERT INTO CompetitionTable(CompetitionID,Description) VALUES ('+IntToStr(sltb.FieldAsInteger(sltb.FieldIndex['CompetitionID'])+1)+',"New Competition")'; sldb.ExecSQL(sSQL); finally sltb.Free; end; finally sldb.Free; end; UpdateCmbCompSele; end; procedure TDefinitionFrm.AddSect; var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; bLast : boolean; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sltb := slDb.GetTable('SELECT * FROM SectionTable'); try bLast:= sltb.MoveLast; sSQL := 'INSERT INTO SectionTable(SectionID,CompetitionID,Gender,Type) VALUES ('+IntToStr(sltb.FieldAsInteger(sltb.FieldIndex['SectionID'])+1)+','+EdtCompID.text+',1,1)'; sldb.ExecSQL(sSQL); finally sltb.Free; end; finally sldb.Free; end; UpdateCmbSectSele; end; procedure TDefinitionFrm.RevertComp; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; iID : integer; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try If CmbCompSele.Text <> '' then begin iID := StrToInt(Copy(CmbCompSele.Text,0,Pos(':',CmbCompSele.Text)-1)); sltb := slDb.GetTable('SELECT * FROM CompetitionTable WHERE CompetitionID='+IntToStr(iID))//ItemIndex starts at 0, CompID at 1 end else sltb := slDb.GetTable('SELECT * FROM CompetitionTable WHERE CompetitionID=1'); try EdtCompID.Text:=sltb.FieldAsString(sltb.FieldIndex['CompetitionID']); EdtCompLoca.Text:=sltb.FieldAsString(sltb.FieldIndex['Location']); EdtCompDesc.Text:=sltb.FieldAsString(sltb.FieldIndex['Description']); EdtCompNote.Text:=sltb.FieldAsString(sltb.FieldIndex['Notes']); finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.RevertSect; var slDBpath: string; sldb : TSQLiteDatabase; sltb : TSQLiteTable; iID : integer; sTemp : string; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try If CmbCompSele.Text <> '' then begin iID := StrToInt(Copy(CmbSectSele.Text,0,Pos(':',CmbSectSele.Text)-1)); sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE SectionID='+IntToStr(iID));//ItemIndex starts at 0, CompID at 1 end else sltb := slDb.GetTable('SELECT * FROM SectionTable WHERE CompetitionID='+EdtCompID.Text); try EdtSectionID.Text:=sltb.FieldAsString(sltb.FieldIndex['SectionID']); EdtSectCompetitionID.Text:=sltb.FieldAsString(sltb.FieldIndex['CompetitionID']); Case sltb.FieldAsInteger(sltb.FieldIndex['Type']) of 1 : CmbType.ItemIndex:=0; 2 : CmbType.ItemIndex:=0; 3 : CmbType.ItemIndex:=1; 4 : CmbType.ItemIndex:=1; end; Case sltb.FieldAsInteger(sltb.FieldIndex['Gender']) of 1 : CmbGender.ItemIndex:=0; 2 : CmbGender.ItemIndex:=1; 3 : CmbGender.ItemIndex:=2; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Age']); if sTemp <> '' then begin //Decode end else begin LblAgeRule.Hide; EdtLowerAge.Text :=''; EdtLowerAge.Hide; EdtUpperAge.Text :=''; EdtUpperAge.Hide; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Level']); if sTemp <> '' then begin //Decode end else begin LblLevelRule.Hide; Edit1.Text :=''; Edit1.Hide; EdtUpperLevel.Text :=''; EdtUpperLevel.Hide; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Weight']); if sTemp <> '' then begin //Decode end else begin LblWeightRule.Hide; EdtLowerWeight.Text :=''; EdtLowerWeight.Hide; EdtUpperWeight.Text :=''; EdtUpperWeight.Hide; end; sTemp := sltb.FieldAsString(sltb.FieldIndex['Height']); if sTemp <> '' then begin //Decode end else begin LblHeightRule.Hide; EdtLowerHeight.Text :=''; EdtLowerHeight.Hide; EdtUpperHeight.Text :=''; EdtUpperHeight.Hide; end; finally sltb.Free; end; finally sldb.Free; end; end; procedure TDefinitionFrm.BtnCompetitionAddClick(Sender: TObject); begin AddComp end; procedure TDefinitionFrm.ClearSect; begin CmbSectSele.Clear; EdtSectionID.Text:=''; EdtSectCompetitionID.Text:=''; CmbType.Clear; CmbGender.Clear; CmbAgeRange.Clear; EdtLowerAge.Text:=''; EdtUpperAge.Text:=''; CmbLevelRange.Clear; Edit1.Text:=''; EdtUpperLevel.Text:=''; CmbWeightRange.Clear; EdtLowerWeight.Text:=''; EdtUpperWeight.Text:=''; CmbHeightRange.Clear; EdtLowerHeight.Text:=''; EdtUpperHeight.Text:=''; end; procedure TDefinitionFrm.CmbCompSeleChange(Sender: TObject); begin If CmbCompSele.ItemIndex <> -1 then begin RevertComp; GrpSection.Enabled:=True; CmbSectSele.Clear; ClearSect; UpdateCmbSectSele; end; end; procedure TDefinitionFrm.BtnCompetitionUpdateClick(Sender: TObject); var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sSQL:= 'UPDATE CompetitionTable SET Description="'+EdtCompDesc.Text+'",Location="'+EdtCompLoca.Text+'",Notes="'+EdtCompNote.Text+'" WHERE CompetitionID ="'+EdtCompID.Text+'";'; sldb.ExecSQL(sSQL); finally sldb.Free; end; end; procedure TDefinitionFrm.BtnCompetitionRevertClick(Sender: TObject); begin RevertComp; end; procedure TDefinitionFrm.BtnCompetitionDeleteClick(Sender: TObject); var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; iID : integer; begin If CmbCompSele.Text <> '' then begin If (CmbCompSele.Text[1] ='1') and (CmbCompSele.Text[2] =':') then begin MessageDlg('Deleting the last record is a very bad idea :/',mtInformation,[mbOK],0); end else begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try iID := StrToInt(Copy(CmbCompSele.Text,0,Pos(':',CmbCompSele.Text)-1)); sSQL:= 'DELETE FROM SectionTable WHERE CompetitionID='+IntToStr(iID)+';'; sldb.ExecSQL(sSQL); sSQL:= 'DELETE FROM CompetitionTable WHERE CompetitionID='+IntToStr(iID)+';'; sldb.ExecSQL(sSQL); finally sldb.Free; end; CmbCompSele.ItemIndex:=0; UpdateCmbCompSele; RevertComp; CmbCompSele.Text:='Select Competition'; end; end; end; procedure TDefinitionFrm.FormCreate(Sender: TObject); begin UpdateCmbCompSele; end; procedure TDefinitionFrm.CmbSectSeleChange(Sender: TObject); begin RevertSect; end; procedure TDefinitionFrm.BtnSectionAddClick(Sender: TObject); begin AddSect; end; procedure TDefinitionFrm.BtnSectionUpdateClick(Sender: TObject); //change fields values var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; iTypeCode : integer; iGenderCode : integer; sAgeStr, sLevelStr, sWeightStr, sHeightStr : string; begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try If CmbType.Text='Fighting' then iTypeCode := 1 else iTypeCode := 3; If CmbGender.Text='Male' then iGenderCode := 1 else if CmbGender.Text='Female' then iGenderCode := 2 else iGenderCode := 3; Case CmbAgeRange.ItemIndex of 0:sAgeStr := 'o-'+EdtLowerAge.Text; 1:sAgeStr := 'u-'+EdtLowerAge.Text; 2:sAgeStr := EdtLowerAge.Text+'-'+EdtUpperAge.Text; end; Case CmbLevelRange.ItemIndex of 0:sLevelStr := 'o-'+Edit1.Text; 1:sLevelStr := 'u-'+Edit1.Text; 2:sLevelStr := Edit1.Text+'-'+EdtUpperLevel.Text; end; Case CmbWeightRange.ItemIndex of 0:sWeightStr := 'o-'+EdtLowerWeight.Text; 1:sWeightStr := 'u-'+EdtLowerWeight.Text; 2:sWeightStr := EdtLowerWeight.Text+'-'+EdtUpperWeight.Text; end; Case CmbHeightRange.ItemIndex of 0:sHeightStr := 'o-'+EdtLowerHeight.Text; 1:sHeightStr := 'u-'+EdtLowerHeight.Text; 2:sHeightStr := EdtLowerHeight.Text+'-'+EdtUpperHeight.Text; end; sSQL:= 'UPDATE SectionTable SET Type="'+IntToStr(iTypeCode)+'",Gender="'+IntToStr(iGenderCode)+'" WHERE SectionID ="'+EdtSectionID.Text+'";'; sldb.ExecSQL(sSQL); finally sldb.Free; end; end; procedure TDefinitionFrm.BtnSectionRevertClick(Sender: TObject); begin RevertSect; end; procedure TDefinitionFrm.BtnSectionDeleteClick(Sender: TObject); var slDBpath: string; sSQL : string; sldb : TSQLiteDatabase; begin If CmbSectSele.Text[1] ='1' then begin MessageDlg('Deleting the last record is a very bad idea :/',mtInformation,[mbOK],0); end else begin slDBPath := ExtractFilepath(application.exename)+ 'Competitions.db'; if not FileExists(slDBPath) then begin MessageDlg('Competitions.db does not exist.',mtInformation,[mbOK],0); exit; end; sldb := TSQLiteDatabase.Create(slDBPath); try sSQL:= 'DELETE FROM SectionTable WHERE SectionID='+CmbSectSele.Text[1]+';'; sldb.ExecSQL(sSQL); finally sldb.Free; end; CmbSectSele.ItemIndex:=0; UpdateCmbSectSele; RevertSect; CmbSectSele.Text:='Select Competition'; end; end; procedure TDefinitionFrm.CmbAgeRangeChange(Sender: TObject); begin Case CmbAgeRange.ItemIndex of 0: begin EdtLowerAge.Show; LblAgeRule.Caption:='Over and including'; LblAgeRule.Show; EdtUpperAge.Hide; end; 1: begin EdtLowerAge.Show; LblAgeRule.Caption:='Under and including'; LblAgeRule.Show; EdtUpperAge.Hide; end; 2: begin EdtLowerAge.Show; LblAgeRule.Caption:='LblAgeRule'; LblAgeRule.Hide; EdtUpperAge.Show; end; end; end; procedure TDefinitionFrm.CmbLevelRangeChange(Sender: TObject); begin Case CmbLevelRange.ItemIndex of 0: begin Edit1.Show; LblLevelRule.Caption:='Over and including'; LblLevelRule.Show; EdtUpperLevel.Hide; end; 1: begin Edit1.Show; LblLevelRule.Caption:='Under and including'; LblLevelRule.Show; EdtUpperLevel.Hide; end; 2: begin Edit1.Show; LblLevelRule.Caption:='LblLevelRule'; LblLevelRule.Hide; EdtUpperLevel.Show; end; end; end; procedure TDefinitionFrm.CmbWeightRangeChange(Sender: TObject); begin Case CmbWeightRange.ItemIndex of 0: begin EdtLowerWeight.Show; LblWeightRule.Caption:='Over and including'; LblWeightRule.Show; EdtUpperWeight.Hide; end; 1: begin EdtLowerWeight.Show; LblWeightRule.Caption:='Under and including'; LblWeightRule.Show; EdtUpperWeight.Hide; end; 2: begin EdtLowerWeight.Show; LblWeightRule.Caption:='LblWeightRule'; LblWeightRule.Hide; EdtUpperWeight.Show; end; end; end; procedure TDefinitionFrm.CmbHeightRangeChange(Sender: TObject); begin Case CmbHeightRange.ItemIndex of 0: begin EdtLowerHeight.Show; LblHeightRule.Caption:='Over and including'; LblHeightRule.Show; EdtUpperHeight.Hide; end; 1: begin EdtLowerHeight.Show; LblHeightRule.Caption:='Under and including'; LblHeightRule.Show; EdtUpperHeight.Hide; end; 2: begin EdtLowerHeight.Show; LblHeightRule.Caption:='LblHeightRule'; LblHeightRule.Hide; EdtUpperHeight.Show; end; end; end; end.

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  • It&rsquo;s ok to throw System.Exception&hellip;

    - by Chris Skardon
    No. No it’s not. It’s not just me saying that, it’s the Microsoft guidelines: http://msdn.microsoft.com/en-us/library/ms229007.aspx  Do not throw System.Exception or System.SystemException. Also – as important: Do not catch System.Exception or System.SystemException in framework code, unless you intend to re-throw.. Throwing: Always, always try to pick the most specific exception type you can, if the parameter you have received in your method is null, throw an ArgumentNullException, value received greater than expected? ArgumentOutOfRangeException. For example: public void ArgChecker(int theInt, string theString) { if (theInt < 0) throw new ArgumentOutOfRangeException("theInt", theInt, "theInt needs to be greater than zero."); if (theString == null) throw new ArgumentNullException("theString"); if (theString.Length == 0) throw new ArgumentException("theString needs to have content.", "theString"); } Why do we want to do this? It’s a lot of extra code when compared with a simple: public void ArgChecker(int theInt, string theString) { if (theInt < 0 || string.IsNullOrWhiteSpace(theString)) throw new Exception("The parameters were invalid."); } It all comes down to a couple of things; the catching of the exceptions, and the information you are passing back to the calling code. Catching: Ok, so let’s go with introduction level Exception handling, taught by many-a-university: You do all your work in a try clause, and catch anything wrong in the catch clause. So this tends to give us code like this: try { /* All the shizzle */ } catch { /* Deal with errors */ } But of course, we can improve on that by catching the exception so we can report on it: try { } catch(Exception ex) { /* Log that 'ex' occurred? */ } Now we’re at the point where people tend to go: Brilliant, I’ve got exception handling nailed, what next??? and code gets littered with the catch(Exception ex) nastiness. Why is it nasty? Let’s imagine for a moment our code is throwing an ArgumentNullException which we’re catching in the catch block and logging. Ok, the log entry has been made, so we can debug the code right? We’ve got all the info… What about an OutOfMemoryException – what can we do with that? That’s right, not a lot, chances are you can’t even log it (you are out of memory after all), but you’ve caught it – and as such - have hidden it. So, as part of this, there are two things you can do one, is the rethrow method: try { /* code */ } catch (Exception ex) { //Log throw; } Note, it’s not catch (Exception ex) { throw ex; } as that will wipe all your important stack trace information. This does get your exception to continue, and is the only reason you would catch Exception (anywhere other than a global catch-all) in your code. The other preferred method is to catch the exceptions you can deal with. It may not matter that the string I’m passing in is null, and I can cope with it like this: try{ DoSomething(myString); } catch(ArgumentNullException){} And that’s fine, it means that any exceptions I can’t deal with (OutOfMemory for example) will be propagated out to other code that can deal with it. Of course, this is horribly messy, no one wants try / catch blocks everywhere and that’s why Microsoft added the ‘Try’ methods to the framework, and it’s a strategy we should continue. If I try: int i = (int) "one"; I will get an InvalidCastException which means I need the try / catch block, but I could mitigate this using the ‘TryParse’ method: int i; if(!Int32.TryParse("one", out i)) return; Similarly, in the ‘DoSomething’ example, it might be beneficial to have a ‘TryDoSomething’ that returns a boolean value indicating the success of continuing. Obviously this isn’t practical in every case, so use the ol’ common sense approach. Onwards Yer thanks Chris, I’m looking forward to writing tonnes of new code. Fear not, that is where helpers come into it… (but that’s the next post)

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  • What's Wrong With My VB.NET Code Of Windows Forms Application?

    - by Krishanu Dey
    I've to forms frmPrint & frmEmail and a dataset(MyDataset) with some DataTable and DataTable Adapters. In frmPrint I've the following Sub Public Sub StartPrinting() try adapterLettersInSchedules.Fill(ds.LettersInSchedules) adapterLetters.Fill(ds.Letters) adapterClients.Fill(ds.Clients) adapterPrintJobs.GetPrintJobsDueToday(ds.PrintJobs, False, DateTime.Today) For Each prow As MyDataSet.PrintJobsRow In ds.PrintJobs Dim lisrow As MyDataSet.LettersInSchedulesRow = ds.LettersInSchedules.FindByID(prow.LetterInScheduleID) If lisrow.Isemail = False Then Dim clientrow As MyDataSet.ClientsRow = ds.Clients.FindByClientID(prow.ClientID) Dim letterrow As MyDataSet.LettersRow = ds.Letters.FindByID(lisrow.LetterID) 'prow. 'lisrow.is Label1.SuspendLayout() Label1.Refresh() Label1.Text = "Printing letter" txt.Rtf = letterrow.LetterContents txt.Rtf = txt.Rtf.Replace("<%Firstname%>", clientrow.FirstName) txt.Rtf = txt.Rtf.Replace("<%Lastname%>", clientrow.LastName) txt.Rtf = txt.Rtf.Replace("<%Title%>", clientrow.Title) txt.Rtf = txt.Rtf.Replace("<%Street%>", clientrow.Street) txt.Rtf = txt.Rtf.Replace("<%City%>", clientrow.City) txt.Rtf = txt.Rtf.Replace("<%State%>", clientrow.State) txt.Rtf = txt.Rtf.Replace("<%Zip%>", clientrow.Zip) txt.Rtf = txt.Rtf.Replace("<%PhoneH%>", clientrow.PhoneH) txt.Rtf = txt.Rtf.Replace("<%PhoneW%>", clientrow.PhoneW) txt.Rtf = txt.Rtf.Replace("<%Date%>", DateTime.Today.ToShortDateString) Try PDoc.PrinterSettings = printDlg.PrinterSettings PDoc.Print() prow.Printed = True adapterPrintJobs.Update(prow) Catch ex As Exception End Try End If Next prow ds.PrintJobs.Clear() Catch ex As Exception MessageBox.Show(ex.Message, "Print", MessageBoxButtons.OK, MessageBoxIcon.Error) End Try End Sub And in frmEmail i've the Following Sub Public Sub SendEmails() try adapterLettersInSchedules.Fill(ds.LettersInSchedules) adapterLetters.Fill(ds.Letters) adapterClients.Fill(ds.Clients) adapterEmailJobs.GetEmailJobsDueToday(ds.EmailJobs, False, Today) Dim ls_string As String For Each prow As MyDataSet.EmailJobsRow In ds.EmailJobs Dim lisrow As MyDataSet.LettersInSchedulesRow = ds.LettersInSchedules.FindByID(prow.LetterInScheduleID) If lisrow.Isemail = True Then Dim clientrow As MyDataSet.ClientsRow = ds.Clients.FindByClientID(prow.ClientID) Dim letterrow As MyDataSet.LettersRow = ds.Letters.FindByID(lisrow.LetterID) txt.Rtf = letterrow.LetterContents ls_string = RTF2HTML(txt.Rtf) ls_string = Mid(ls_string, 1, Len(ls_string) - 176) If ls_string = "" Then Throw New Exception("Rtf To HTML Conversion Failed") Label1.SuspendLayout() Label1.Refresh() Label1.Text = "Sending Email" If SendEmail(clientrow.Email, ls_string, letterrow.EmailSubject) Then Try prow.Emailed = True adapterEmailJobs.Update(prow) Catch ex As Exception End Try Else prow.Emailed = False adapterEmailJobs.Update(prow) End If End If Next prow Catch ex As Exception MessageBox.Show(ex.Message, "Email", MessageBoxButtons.OK, MessageBoxIcon.Error) End Try End Sub I'm running this two subs using two different Threads. Public th As New Thread(New ThreadStart(AddressOf StartFirstPrint)) Public th4 As New Thread(New ThreadStart(AddressOf sendFirstEmail)) Here is the code of StartFirstPrint and sendFirstEmail Public Sub StartFirstPrint() Do While thCont Try Dim frm As New frmPrint() 'frm.MdiParent = Me frm.StartPrinting() Catch ex As Exception End Try Loop End Sub Public Sub sendFirstEmail() Do While thCont Try Dim frmSNDEmail As New frmEmail frmSNDEmail.SendEmails() Catch ex As Exception End Try Loop End Sub the thCont is a public boolean variable that specifies when to shop those threads. Most Of the time this works very well. But some times it gives errors Like the following image I don't know why is this occurring. Please help me.

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  • new to lists on python

    - by user1762229
    This is my current code: while True: try: mylist = [0] * 7 for x in range(7): sales = float(input("Sales for day:")) mylist[x] = sales if sales < 0: print ("Sorry,invalid. Try again.") except: print ("Sorry, invalid. Try again.") else: break print (mylist) best = max(sales) worst = min(sales) print ("Your best day had", best, "in sales.") print ("Your worst day had", worst, "in sales.") When I run it I get this: Sales for day:-5 Sorry,invalid. Try again. Sales for day:-6 Sorry,invalid. Try again. Sales for day:-7 Sorry,invalid. Try again. Sales for day:-8 Sorry,invalid. Try again. Sales for day:-9 Sorry,invalid. Try again. Sales for day:-2 Sorry,invalid. Try again. Sales for day:-5 Sorry,invalid. Try again. [-5.0, -6.0, -7.0, -8.0, -9.0, -2.0, -5.0] Traceback (most recent call last): File "C:/Users/Si Hong/Desktop/HuangSiHong_assign9_part.py", line 45, in <module> best = max(sales) TypeError: 'float' object is not iterable I am not quite sure how to code it so that, the lists do NOT take in negative values, because I only want values 0 or greater. I am not sure how to solve the TypeError issue so that the min and max values will print as in my code My last issue is, if I want to find the average value of the seven inputs that an user puts in, how should I go about this in pulling the values out of the lists Thank you so much

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  • Try to fill the GAE datastore but the code consumes to much cpu time. How to optimize this?

    - by Neverland
    I try to get the list of images in Amazon EC2 inside the Google datastore. I want to realize this with a cron job inside the GAE. class AmazonEC2uswest(db.Model): ami = db.StringProperty(required=True) mani = db.StringProperty() typ = db.StringProperty() arch = db.StringProperty() state = db.StringProperty() owner = db.StringProperty() class CronAMIsAmazonUS_WEST(webapp.RequestHandler): def get(self): aws_access_key_id_admin = "<secret>" aws_secret_access_key_admin = "<secret>" conn_us_west = boto.ec2.connect_to_region('us-west-1', aws_access_key_id=aws_access_key_id_admin, aws_secret_access_key=aws_secret_access_key_admin, is_secure = False) liste_images_us_west = conn_us_west.get_all_images() laenge_liste_images_us_west = len(liste_images_us_west) for i in range(laenge_liste_images_us_west): datastore_uswest_AMIs = AmazonEC2uswest(ami=liste_images_us_west[i].id, mani=str(liste_images_us_west[i].location), typ=liste_images_us_west[i].type, arch=liste_images_us_west[i].architecture, state=liste_images_us_west[i].state, owner=liste_images_us_west[i].ownerId) datastore_uswest_AMIs.put() The problem: Getting the list with get_all_images() lasts only a few seconds. But writing the data to the Google datastore needs way too much CPU time. My IBM T42p (P4M with 2GHz) needs for that piece of code approx. 1 Minute! Is it possible to optimize my code in a way that it needs fewer CPU time?

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  • Subterranean IL: Filter exception handlers

    - by Simon Cooper
    Filter handlers are the second type of exception handler that aren't accessible from C#. Unlike the other handler types, which have defined conditions for when the handlers execute, filter lets you use custom logic to determine whether the handler should be run. However, similar to a catch block, the filter block does not get run if control flow exits the block without throwing an exception. Introducing filter blocks An example of a filter block in IL is the following: .try { // try block } filter { // filter block endfilter }{ // filter handler } or, in v1 syntax, TryStart: // try block TryEnd: FilterStart: // filter block HandlerStart: // filter handler HandlerEnd: .try TryStart to TryEnd filter FilterStart handler HandlerStart to HandlerEnd In the v1 syntax there is no end label specified for the filter block. This is because the filter block must come immediately before the filter handler; the end of the filter block is the start of the filter handler. The filter block indicates to the CLR whether the filter handler should be executed using a boolean value on the stack when the endfilter instruction is run; true/non-zero if it is to be executed, false/zero if it isn't. At the start of the filter block, and the corresponding filter handler, a reference to the exception thrown is pushed onto the stack as a raw object (you have to manually cast to System.Exception). The allowed IL inside a filter block is tightly controlled; you aren't allowed branches outside the block, rethrow instructions, and other exception handling clauses. You can, however, use call and callvirt instructions to call other methods. Filter block logic To demonstrate filter block logic, in this example I'm filtering on whether there's a particular key in the Data dictionary of the thrown exception: .try { // try block } filter { // Filter starts with exception object on stack // C# code: ((Exception)e).Data.Contains("MyExceptionDataKey") // only execute handler if Contains returns true castclass [mscorlib]System.Exception callvirt instance class [mscorlib]System.Collections.IDictionary [mscorlib]System.Exception::get_Data() ldstr "MyExceptionDataKey" callvirt instance bool [mscorlib]System.Collections.IDictionary::Contains(object) endfilter }{ // filter handler // Also starts off with exception object on stack callvirt instance string [mscorlib]System.Object::ToString() call void [mscorlib]System.Console::WriteLine(string) } Conclusion Filter exception handlers are another exception handler type that isn't accessible from C#, however, just like fault handlers, the behaviour can be replicated using a normal catch block: try { // try block } catch (Exception e) { if (!FilterLogic(e)) throw; // handler logic } So, it's not that great a loss, but it's still annoying that this functionality isn't directly accessible. Well, every feature starts off with minus 100 points, so it's understandable why something like this didn't make it into the C# compiler ahead of a different feature.

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  • games not running on full screen

    - by ALY
    i have laptop hp dv6 with processor core2due hard 320 and video card intel 1 giga every time i try to play game i have to make it not on the full screen if its on the full sreen its stopped and get down to the windows bar try to get up it go down again i try this with many games its the same i try to decrease the screen or the game resolution its the same too i try to download the last version of direct x the same thing i use windows 7 so can any one help

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  • New Development Snapshot

    I finally did the work necessary to improve the codegen for finally handlers. More improvements are still possible, but at least most finally handlers will now execute without touching the exception object (and hence without having to do any mapping/stack trace collection work). It also means that assembly file sizes are a little bit smaller and that the debugging experience should be improved (less exception catching & rethrowing). Changes: ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • My java program seems to be skipping over the try{}, executing the catch{} and then throwing a NullPointerException. What should I do?

    - by Matt Bolopue
    I am writing a program that calculates the number of words, syllables, and sentences in any given text file. I don't need help finding those numbers, however my program (which currently should only find the number of words in the text file) will not import the text file even when I type in the name of the file correctly. The text file is in the same folder as the source code. Instead it tells me every time that what I typed in has the wrong file extension (see my catch{}) and then proceeds to throw a null pointer. I am at a loss for what could be causing it. Any suggestions? import java.io.*; import java.util.*; public class Reading_Lvl_Calc { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub int words = 0; String fileName; Scanner scan; Scanner keyread = new Scanner(System.in); System.out.println("Please enter a file name (or QUIT to exit)"); fileName = keyread.nextLine(); File doc = new File(fileName); //while(scan.equals(null)){ try { scan = new Scanner(doc); } catch(Exception e) { if(fileName.substring(fileName.indexOf(".")) != ".txt") System.out.println("I'm sorry, the file \"" + fileName + "\" has an invalid file extension."); else System.out.println("I am sorry, the file \"" + fileName + " \" cannot be found.\n The file must be in the same directory as this program"); scan = null; } // } while(scan.hasNext()){ words++; scan.next(); } System.out.println(words); } }

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  • Delphi Exception Handling - How to clean up properly?

    - by Tom
    I'm looking at some code in an application of ours and came across something a little odd from what I normally do. With exception handling and cleanup, we (as well as many other programmers out there, I'm sure) use a Try/Finally block embedded with a Try/Except block. Now I'm used to the Try/Except inside the Try/Finally like so: Try Try CouldCauseError(X); Except HandleError; end; Finally FreeAndNil(x); end; but this other block of code is reversed as so: Try Try CouldCauseError(X); Finally FreeAndNil(x); end; Except HandleError; end; Looking around the web, I'm seeing folks doing this both ways, with no explanation as to why. My question is, does it matter which gets the outside block and which gets the inside block? Or will the except and finally sections get handled no matter which way it is structured? Thanks.

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  • problem with dmg file

    - by madalina
    Hello, I have created a dmg file named try.dmg which contains an executable application myapplication.app together with a compiled library mylibrary.lib; I used Disk Utility in order to create the try.dmg file. I mounted the try.dmg file on my computer and I opened the application myapplication.app with no problems. Still, I tried to do the same thing on another Macintosh, with the same operating system Mac OS X, but I got some problems: I mounted the try.dmg file and then when I tried to open the application myapplication.app I got an error message, that the application has quit unexpectedly. Can someone explain me what is it happening? How come this try.dmg file can be mounted and the application can be opened with no problems on my computer with Mac OS X, but on another computer with Mac OS X, after I mount the try.dmg file I get errors when I try opening the application? Thank you very much for your help. Best wishes, Madalina

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  • java source code doubt

    - by abson
    this compiles class ex1 { public int show() { try { int a=10/10; return 10;} catch(ArithmeticException e) { System.out.println(e); } finally { System.out.println("Finally");} System.out.println("hello"); return 20; } } on the other hand this doesn't class ex15 { public int show() { try { int a=10/0; return 10;} catch(ArithmeticException e) { System.out.println(e); } finally { System.out.println("Finally"); return 40;} System.out.println("hello"); return 20; } } why is it so?

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  • segmentation fault while using format string to scan input

    - by Aman Deep Gautam
    consider the code and its result: while ((row = mysql_fetch_row (table_info)) != NULL) { answer='\0'; printf ( "%s: ", row[0] ); scanf ( "%c", &answer ); getchar(); if ( answer == 'y') { printf ( "*****\n" ); table_name[index] = malloc ( strlen(row[0]) + 1 ); printf ( "*****\n" ); memcpy ( &table_name[index], &row[0], strlen(row[0]) + 1 ); } printf ( "finally inserted: %s \n", table_name[index]); } The result on execution: 1_time_access: y ***** ***** finally inserted: 1_time_access 2_time_access: y ***** ***** finally inserted: 2_time_access 39_time_access: y ***** ***** finally inserted: 39_time_access Explanation of result: row[0] has value 1_time_access, 2_time_access, 39_time_access. Now Consider a better way of doing it which is using a format string to escape the \n. I run the following code but it gives segentation fault, I cannot understand why. Code: while ((row = mysql_fetch_row (table_info)) != NULL) { answer='\0'; printf ( "%s: ", row[0] ); scanf ( "%[^\n]%*c", &answer ); if ( answer == 'y') { printf ( "*****\n" ); fflush(stdout); table_name[index] = malloc ( strlen(row[0]) + 1 ); printf ( "*****\n" ); fflush(stdout); memcpy ( &table_name[index], &row[0], strlen(row[0]) + 1 ); } printf ( "finally inserted: %s \n", table_name[index]); fflush(stdout); } Result: 1_time_access: y ***** ./set-env.sh: line 17: 15263 Segmentation fault (core dumped) ./exec dataset_one (do not worry about set-env.sh, it is the script running th program.) I canot understand why this is happening.

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  • yum install php-tidy - no more mirrors

    - by Lylo
    Hi im trying to get the tidy extensions installed on centos running php 5.3 Thanks Downloading Packages: http://repo.webtatic.com/yum/centos/5/x86_64/php-tidy-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-pdo-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-mysql-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-gd-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-xml-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-common-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-devel-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://repo.webtatic.com/yum/centos/5/x86_64/php-cli-5.3.5-1.w5.x86_64.rpm: [Errno 14] HTTP Error 404: Not Found Trying other mirror. Error Downloading Packages: php-tidy-5.3.5-1.w5.x86_64: failure: php-tidy-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-cli-5.3.5-1.w5.x86_64: failure: php-cli-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-5.3.5-1.w5.x86_64: failure: php-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-pdo-5.3.5-1.w5.x86_64: failure: php-pdo-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-devel-5.3.5-1.w5.x86_64: failure: php-devel-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-mysql-5.3.5-1.w5.x86_64: failure: php-mysql-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-common-5.3.5-1.w5.x86_64: failure: php-common-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-xml-5.3.5-1.w5.x86_64: failure: php-xml-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try. php-gd-5.3.5-1.w5.x86_64: failure: php-gd-5.3.5-1.w5.x86_64.rpm from webtatic: [Errno 256] No more mirrors to try.

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