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  • Commonly use Utility methods in projects

    - by Newbie
    In many projects, we come across various utility methods, e.g. Email validation Convert from dd/mm/yyyy to mm/dd/yyyy or other date formats I would like to know as what are the varoius common utility method that we genrally use? I know that some methods are project specific but many will be common. I searched in net to get a list of as much as possible but none I found to be very informative. Could you please help? Well I am more interested in the method behaviour and not in their implementation. If I can get the method names and what it does e.g. ConvertMMDDYYYY to ConvertDDMMYYYY it will server my purpose. Thanks

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  • How to use #if directives in C#(3.0)

    - by Newbie
    I just found two piece of code #if CONSOLE // defined by the console version using ournamespace.FactoryInitializer; #endif and #if _NET_1_1 log4net.Config.DOMConfigurator.ConfigureAndWatch(new System.IO.FileInfo(s) ); #else log4net.Config.XmlConfigurator.ConfigureAndWatch(new System.IO.FileInfo(s) ); #endif Can any one please tell me with a running sample( please provide a simple one) what is the significance of those code snippets and when and how to use those? Thanks.

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  • Populate an Object Model from a data dataTable(C#3.0)

    - by Newbie
    I have a situation I am getting data from some external sources and is populating into the datatable. The data looks like this DATE WEEK FACTOR 3/26/2010 1 RM_GLOBAL_EQUITY 3/26/2010 1 RM_GLOBAL_GROWTH 3/26/2010 2 RM_GLOBAL_VALUE 3/26/2010 2 RM_GLOBAL_SIZE 3/26/2010 2 RM_GLOBAL_MOMENTUM 3/26/2010 3 RM_GLOBAL_HIST_BETA I have a object model like this public class FactorReturn { public int WeekNo { get; set; } public DateTime WeekDate { get; set; } public Dictionary<string, decimal> FactorCollection { get; set; } } As can be seen that the Date field is always constant. And a single(means unique) week can have multiple FACTORS. i.e. For a date(3/26/2010), for Week No. 1, there are two FACTORS(RM_GLOBAL_EQUITY and RM_GLOBAL_GROWTH). Similarly, For a date(3/26/2010), for Week No. 2, there are three FACTORS(RM_GLOBAL_VALUE , RM_GLOBAL_SIZE and RM_GLOBAL_MOMENTUM ). Now we need to populate this data into our object model. The final output will be WeekDate: 3/26/2010 WeekNo : 1 FactorCollection : RM_GLOBAL_EQUITY FactorCollection : RM_GLOBAL_GROWTH WeekNo : 2 FactorCollection : RM_GLOBAL_VALUE FactorCollection : RM_GLOBAL_SIZE FactorCollection : RM_GLOBAL_MOMENTUM WeekNo : 3 FactorCollection : RM_GLOBAL_HIST_BETA That is, overall only 1 single collection, where the Factor type will vary depending on week numbers. I have tried but of useless. Nothing works. Could you please help me?. I feel it is very tough I am using C# 3.0 Thanks

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  • Is there any alternative way of writing this switch statement(C#3.0)

    - by Newbie
    Can it be done in a better way public static EnumFactorType GetFactorEnum(string str) { Standardization e = new Standardization(); switch (str.ToLower()) { case "beta": e.FactorType = EnumFactorType.BETA; break; case "bkp": e.FactorType = EnumFactorType.BOOK_TO_PRICE; break; case "yld": e.FactorType = EnumFactorType.DIVIDEND_YIELD; break; case "growth": e.FactorType = EnumFactorType.GROWTH; break; case "mean": e.FactorType = EnumFactorType.MARKET_CAP; break; case "momentum": e.FactorType = EnumFactorType.MOMENTUM; break; case "size": e.FactorType = EnumFactorType.SIZE; break; case "stat_fact1": e.FactorType = EnumFactorType.STAT_FACT_1; break; case "stat_fact2": e.FactorType = EnumFactorType.STAT_FACT_2; break; case "value": e.FactorType = EnumFactorType.VALUE; break; } return e.FactorType; } If I create a Static class(say Constatant) and declare variable like public static string BETA= "beta"; and then if I try to put that in the Case expression like Case Constants.BETA : e.FactorType = EnumFactorType.BETA; break; then the compiler will report error.(quite expected) So is there any other way?(I canot change the switch statement) Using C#3.0 Thanks

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  • mysql phpmyadmin, how to save date of birth that was attained through a form with the input type "se

    - by newbie-25
    Hello, I have a form which asks the user his or her date of birth. Its a drop down box since I use the select input type. The first drop down has Months, second has Days, the third has the Years. So the format should be Month(October), Day(25), Year(1990). In other words the months spell out the actual month and not simply the number representation of the month. However, I would like to save the Day and Year in their respective formats. How can I do this in phpMyAdmin? Should I use the DATE type? what should the value be? I just need to know how to correlate all of this in phpmyadmin, so I can save it properly. Thank you.

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  • Problem in populating a dictionary object using Enumerable.Range() (C#3.0)

    - by Newbie
    If I do for (int i = 0; i < appSettings.Count; i++) { string key = appSettings.Keys[i]; euFileDictionary.Add(key, appSettings[i]); } It is working fine. When I am trying the same thing using Enumerable.Range(0, appSettings.Count).Select(i => { string Key = appSettings.Keys[i]; string Value = appSettings[i]; euFileDictionary.Add(Key, Value); }).ToDictionary<string,string>(); I am getting a compile time error The type arguments for method 'System.Linq.Enumerable.Select(System.Collections.Generic.IEnumerable, System.Func)' cannot be inferred from the usage. Try specifying the type arguments explicitly. Any idea? Using C#3.0 Thanks

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  • Problem in List<double[,]> (C#3.0)

    - by Newbie
    What is wrong with List<double> x = new List<double> { 0.0330, -0.6463, 0.1226, -0.3304, 0.4764, -0.4159, 0.4209, -0.4070, -0.2090, -0.2718, -0.2240, -0.1275, -0.0810, 0.0349, -0.5067, 0.0094, -0.4404, -0.1212 }; List<double> y = new List<double> { 0.4807, -3.7070, -4.5582, -11.2126, -0.7733, 3.7269, 2.7672, 8.3333, 4.7023,0,0,0,0,0,0,0,0,0 }; List z = new List{x,y}; Error: Argument '1': cannot convert from 'System.Collections.Generic.List' to 'double[,]' Help neded.(C#3.0)

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  • C++: How to make comparison function for char arrays?

    - by Newbie
    Is this possible? i get weird error message when i put char as the type: inline bool operator==(const char *str1, const char *str2){ // ... } Error message: error C2803: 'operator ==' must have at least one formal parameter of class type ... which i dont understand at all. I was thinking if i could directly compare stuff like: const char *str1 = "something"; const char *str2 = "something else"; const char str3[] = "lol"; // not sure if this is same as above and then compare: if(str1 == str2){ // ... } etc. But i also want it to work with: char *str = new char[100]; and: char *str = (char *)malloc(100); I am assuming every char array i use this way would end in NULL character, so the checking should be possible, but i understand it can be unsafe etc. I just want to know if this is possible to do, and how.

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  • How to find the real problem line in my code with Application Verifier ?

    - by Newbie
    I am now trying to use this Application Verifier debugging tool, but i am stuck, first of all: it breaks the program at a line that is simple variable set line (s = 1; for example) Secondly, now when i run this program under debugger, my program seems to have changed its behaviour: i am drawing image, and now one of the colors has changed o_O, all those parts of the image that i dont draw on, has changed the color to #CDCDCD when it should be #000000, and i already set the default color to zero, still it becomes to #CDCDCD. How do i make any sense to this? Here is the output AV gave me: VERIFIER STOP 00000002: pid 0x8C0: Access violation exception. 14873000 : Invalid address causing the exception 004E422C : Code address executing the invalid access 0012EB08 : Exception record 0012EB24 : Context record AVRF: Noncontinuable verifier stop 00000002 encountered. Terminating process ... The program '[2240] test.exe: Native' has exited with code -1073741823 (0xc0000001).

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  • Is the below thread pool implementation correct(C#3.0)

    - by Newbie
    Hi Experts, For the first time ever I have implemented thread pooling and I found it to be working. But I am not very sure about the way I have done is the appropriate way it is supposed to be. Would you people mind in spending some valuable time to check and let me know if my approach is correct or not? If you people find that the approach is incorrect , could you please help me out in writing the correct version. I have basicaly read How to use thread pool and based on what ever I have understood I have developed the below program as per my need public class Calculation { #region Private variable declaration ManualResetEvent[] factorManualResetEvent = null; #endregion public void Compute() { factorManualResetEvent = new ManualResetEvent[2]; for (int i = 0; i < 2; i++){ factorManualResetEvent[i] = new ManualResetEvent(false); ThreadPool.QueueUserWorkItem(ThreadPoolCallback, i);} //Wait for all the threads to complete WaitHandle.WaitAll(factorManualResetEvent); //Proceed with the next task(s) NEXT_TASK_TO_BE_EXECUTED(); } #region Private Methods // Wrapper method for use with thread pool. public void ThreadPoolCallback(Object threadContext) { int threadIndex = (int)threadContext; Method1(); Method2(); factorManualResetEvent[threadIndex].Set(); } private void Method1 () { //Code of method 1} private void Method2 () { //Code of method 2 } #endregion }

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  • Problem in LINQ query formation

    - by Newbie
    I have written List<int> Uids = new List<int>(); Uids = (from returnResultSet in ds.ToList() from portfolioReturn in returnResultSet.Portfolios from baseRecord in portfolioReturn.ChildData select new int { id = baseRecord.Id }).ToList<int>(); Getting error: 'int' does not contain a definition for 'id' what is the problem that i created? Thanks

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  • Cannot understand the behaviour of C# compiler while instantiating a class thru interface

    - by Newbie
    I have a class that implements an interface. The interface is public interface IRiskFactory { void StartService(); void StopService(); } The class that implements the interface is public class RiskFactoryService : IRiskFactory { } Now I have a console application and one window service. From the console application if I write the following code static void Main(string[] args) { IRiskFactory objIRiskFactory = new RiskFactoryService(); objIRiskFactory.StartService(); Console.ReadLine(); objIRiskFactory.StopService(); } It is working fine. However, when I mwrite the same piece of code in Window service public partial class RiskFactoryService : ServiceBase { IRiskFactory objIRiskFactory = null; public RiskFactoryService() { InitializeComponent(); objIRiskFactory = new RiskFactoryService(); <- ERROR } /// <summary> /// Starts the service /// </summary> /// <param name="args"></param> protected override void OnStart(string[] args) { objIRiskFactory.StartService(); } /// <summary> /// Stops the service /// </summary> protected override void OnStop() { objIRiskFactory.StopService(); } } It throws error: Cannot implicitly convert type 'RiskFactoryService' to 'IRiskFactory'. An explicit conversion exists (are you missing a cast?) When I type cast to the interface type, it started working objIRiskFactory = (IRiskFactory)new RiskFactoryService(); My question is why so?

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  • A better way of representing File Attachment into a list(c#3.0)

    - by Newbie
    I have written List<Attachment> lstAttachment = new List<Attachment>(); //Check if any error file is present in which case it needs to be send if (new FileInfo(Path.Combine(errorFolder, errorFileName)).Exists) { Attachment unprocessedFile = new Attachment(Path.Combine(errorFolder, errorFileName)); lstAttachment.Add(unprocessedFile); } //Check if any processed file is present in which case it needs to be send if (new FileInfo(Path.Combine(outputFolder, outputFileName)).Exists) { Attachment processedFile = new Attachment(Path.Combine(outputFolder, outputFileName)); lstAttachment.Add(processedFile); } Working fine and is giving the expected output. Basically I am attaching the file to the list based on whether the file is present or not. I am looking for any other elegant solution than the one I have written. Reason: Want to learn differnt ways of representing the same program. I am using C#3.0 Thanks.

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  • Is an index required for columns in ON clause?

    - by newbie
    Do I have to create an index on columns referenced in Joins? E.g. SELECT * FROM left_table INNER JOIN right_table ON left_table.foo = right_table.bar WHERE ... Should I create indexes on left_table(foo), right_table(bar), or both? I noticed different results when I used EXPLAIN (Postgresql) with and without indexes and switching around the order of the comparison (right_table.bar = left_table.foo) I know for sure that indexes are used for the left of the WHERE clause but I am wondering whether I need indexes for columns listed in ON clauses.

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  • negative color with glBlendFunc() ?

    - by Newbie
    i want my lines to be drawn with negative color (taken from the screen under the line), i just didnt understand how the blending works, looked at docs etc, tested 50 combinations and so on. started to think its not possible at all... could someone just give the two values, im tired of thinking how it works. thanks,

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  • Help needed in pivoting (SQL Server 2005)

    - by Newbie
    I have a table like ID Grps Vals --- ---- ----- 1 1 1 1 1 3 1 1 45 1 2 23 1 2 34 1 2 66 1 3 10 1 3 17 1 3 77 2 1 144 2 1 344 2 1 555 2 2 11 2 2 22 2 2 33 2 3 55 2 3 67 2 3 77 The desired output being ID Record1 Record2 Record3 --- ------- ------- ------- 1 1 23 10 1 3 34 17 1 45 66 77 2 144 11 55 2 344 22 67 2 555 33 77 I have tried(using while loop) but the program is running slow. I have been asked to do so by using SET based approach. My approach so far is SELECT ID,[1] AS [Record1], [2] AS [Record2], [3] as [Record3] FROM ( Select Row_Number() Over(Partition By ID Order By Vals) records ,* From myTable)x PIVOT (MAX(vals) FOR Grps IN ([1],[2],[3])) p But it is not working. Can any one please help to solve this.(SQL SERVER 2005)

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  • How to access the first value from an object in C#3.0

    - by Newbie
    How can I access the first value from object t = (object) wsf.LinEst(y.ToArray(), x.ToArray(), false, true); The output is object[1..5, 1..2]} [1, 1]: 0.17134831460674155 [1, 2]: 0.0 [2, 1]: 0.019612696690686725 [2, 2]: -2146826246 [3, 1]: 0.95020429009193053 [3, 2]: 0.82746057986828336 [4, 1]: 76.328205128205056 [4, 2]: 4.0 [5, 1]: 52.261235955056179 [5, 2]: 2.7387640449438226 I need to get only [1,1] 's value i.e. 0.17134831460674155 How to get that. The linEst return an object only. I am using C#3.0 Thanks Thanks

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  • A better way of handling the below program(may be with Take/Skip/TakeWhile.. or anything better)

    - by Newbie
    I have a data table which has only one row. But it is having 44 columns. My task is to get the columns from the 4th row till the end. Henceforth, I have done the below program that suits my requirement. (kindly note that dt is the datatable) List<decimal> lstDr = new List<decimal>(); Enumerable.Range(0, dt.Columns.Count).ToList().ForEach(i => { if (i > 3) lstDr.Add(Convert.ToDecimal(dt.Rows[0][i])); } ); There is nothing harm in the program. Works fine. But I feel that there may be a better way of handimg the program may be with Skip ot Take or TakeWhile or anyother stuff. I am looking for a better solution that the one I implemented. Is it possible? I am using c#3.0 Thanks.

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