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  • How To Bind ComboBox With ListItems in windows Forms?

    - by hatem gamil
    hi all i want to make a 2 comboBoxes ,the first one shows Hours and the Second Shows minutes but i cant do so in windows application as i have working as a web dev for a while and i forgot so i want to declare listItems then bind it to combo box i want to make it as a custom control so i want some help to tell me how to do that i am using VS 2008 thnxx

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  • Does not contain a definition

    - by JB
    public void button2_Click(object sender, System.EventArgs e) { string text = textBox1.Text; Mainform = this; this.Hide(); GetSchedule myScheduleFinder = new GetSchedule(); string result = myScheduleFinder.GetDataFromNumber(text);// says there is no definition if (!string.IsNullOrEmpty(result)) { MessageBox.Show(result); } else { MessageBox.Show("Enter A Valid ID Number!"); } } says it does not contain definition for it but on my GetSchedule .cs file i have it defined public string GetDataFromNumber(string ID)//defined here { foreach (IDnumber IDCandidateMatch in IDnumbers) { if (IDCandidateMatch.ID == ID) { StringBuilder myData = new StringBuilder(); myData.AppendLine(IDCandidateMatch.Name); myData.AppendLine(": "); myData.AppendLine(IDCandidateMatch.ID); myData.AppendLine(IDCandidateMatch.year); myData.AppendLine(IDCandidateMatch.class1); myData.AppendLine(IDCandidateMatch.class2); myData.AppendLine(IDCandidateMatch.class3); myData.AppendLine(IDCandidateMatch.class4); //return myData; return myData.ToString(); } } return ""; } } } }

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  • SetScrollPos: scroll bar moving, but control content not updating

    - by sniperX
    [DllImport("user32.dll")] public static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool bRedraw); [DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)] public static extern int GetScrollPos(int hWnd, int nBar); So those are the externs im using to move the scroll position, what im doing, is i get the current position, and add or substract an exact amount of pixels, and the scroll bar on my form moves perfectly how i want it, but the content in the control stays stationary. What is the problem here?

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  • If Html File Has No Ending "/tr" Tag OR "/td" Tag Then HTML Agility Pack Does Not Read That Informat

    - by Harikrishna
    I am using HTML Agility Pack to parse html content. I am using parsing to extract table information. It works. But if there is no ending "/tr" tag or "/td" tag then it does not parse that information perfectly.(in which there is no ending tr tag or td tag.) Like <TABLE border=0><TBODY><TR height=20><TD class=xl27boL noWrap width="7%">01890345&nbsp;</TD> <TD class=xl27boL noWrap width="4%">1416</TD> <TD class=xl27boL noWrap width="7%">kjlkjkls&nbsp;</TD><TD class=xl27boL noWrap width="4%">14:01:57&nbsp;</TD> <TD class=xl27boL noWrap align=left width="15%">Football</TD><TD class=xl27boL noWrap align=right width="5%">&nbsp;</TD> <TD class=xl27boL noWrap align=right width="5%">50&nbsp;</TD> <TD class=xl27boL noWrap align=right width="5%">4997.2500</TD><TD class=xl27boL noWrap align=right width="7%">249862.50&nbsp;</TD><TD class=xl27boL noWrap align=right width="5%">&nbsp;</TD><TD class=xl27boL noWrap align=right width="5%">&nbsp;</TD><TD class=xl27boRLnoWrap align=right width="8%">249612.64&nbsp;</TD><TD class=xl27boL noWrap align=right width="5%">4997.2500</TD><TD class=xl27boL noWrap align=right width="7%">249862.50&nbsp;</TD><TD class=xl27boL noWrap align=right width="5%">249.86</TD><TD class=xl27boL noWrap align=right width="5%">4992.2528</TD><TD class=xl27boL noWrap align=right width="5%">&nbsp;</TD><TD class=xl27boL noWrap align=right width="5%">&nbsp;</TD> <TD class=xl27boRL noWrap align=right width="8%">249612.64&nbsp;</TD> </table> So for that what should I do ?

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  • Error while coping datacolumn with data from one table to another .

    - by Harikrishna
    I have one Datatable like DataTable addressAndPhones; And there are four columns name,address,phoneno,and other details and I only want two columns Name and address from that so I do for that is DataTable addressAndPhones2; addressAndPhones2.Columns.Add(new DataColumn(addressAndPhones.Columns["name"].ColumnName)); addressAndPhones2.Columns.Add(new DataColumn(addressAndPhones.Columns["address"].ColumnName)); But it gives me error so how can I copy fix no of columns data from one table to another table ? ERROR :Object reference not set to an instance of an object.

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  • How to find out where a thread lock happend?

    - by SchlaWiener
    One of our company's Windows Forms application had a strange problem for several month. The app worked very reliable for most of our customers but on some PC's (mostly with a wireless lan connection) the app sometimes just didn't respond anymore. (You click on the UI and windows ask you to wait or kill the app). I wasn't able to track down the problem for a long time but now I figured out what happend. The app had this line of code // don't blame me for this. Wasn't my code :D Control.CheckForIllegalCrossThreadCalls = false and used some background threads to modify the controls. No I found a way to reproduce the application stopping responding bug on my dev machine and tracked it down to a line where I actually used Invoke() to run a task in the main thread. Me.Invoke(MyDelegate, arg1, arg2) Obviously there was a thread lock somewhere. After removing the Control.CheckForIllegalCrossThreadCalls = false statement and refactoring the whole programm to use Invoke() if modifying a control from a background thread, the problem is (hopefully) gone. However, I am wondering if there is a way to find such bugs without debugging every line of code (Even if I break into debugger after the app stops responding I can't tell what happend last, because the IDE didn't jump to the Invoke() statement) In other words: If my apps hangs how can I figure out which line of code has been executed last? Maybe even on the customers PC. I know VS2010 offers some backwards debugging feature, maybe that would be a solution, but currently I am using VS2008.

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  • Hundreds of custom UserControls create thousands of USER Objects

    - by Andy Blackman
    I'm creating a dashboard application that shows hundreds of "items" on a FlowLayoutPanel. Each "item" is a UserControl that is made up of 12 or labels. My app queries a database and then creates an "item" instance for each record, populating ethe labels and textboxes with data before adding it to the FlowLayoutPanel. After adding about 560 items to the panel, I noticed that the USER Objects count in my Task Manager had gone up to about 7300, which was much much larger than any other app on my machine. I did a quick spot of mental arithmetic (OK, I might have used calc.exe) and figured that 560 * 13 (12 labels plus the UserControl itself) is 7280. So that suddenly gave away where all the objects were coming from... Knowing that there is a 10,000 USER object limit before windows throws in the towel, I'm trying to figure better ways of drawing these items onto the FlowLayoutPanel. My ideas so far are as follows: 1) User-draw the "item", using graphics.DrawText and DrawImage in place of many of the labels. I'm hoping that this will mean 1 item = 1 USER Object, not 13. 2) Have 1 instance of the "item", then for each record, populate the instance and use the Control.DrawToBitmap() method to grab an image and then use that in the FlowLayoutPanel (or similar) So... Does anyone have any other suggestions ??? P.S. It's a zoomable interface, so I have already ruled out "Paging" as there is a requirement to see all items at once :( Thanks everyone.

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  • How to subscribe to EventHandler of a private control outside of Form

    - by randooom
    Hi all, maybe my design is not good, or I don't see the obvious solution, but I want to subscribe to a buttonClick EventHandler of Form1 from outside form1. For example I have a Controller and Form1 who are both instanced in the main function. Now I want to subscribe a function from Controller to the buttonClick event from Button1_Click in Form1. But the button1 is declarded private, so i can't do form1->Button1->Click += gcnew EventHandler(controller->function) Is there any way to get around this? Ok I could write a setter or something in Form1, but is there any other solution? I read some examples, but they are all calling events from within the same class so they don't address my specific problem.

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  • VS2010 is removing code from designer without warning - causing issues

    - by schmoopy
    I have a WinForm with a pretty complex layout (has lots of controls, panels, etc.) Whenever i open the form the file is automatically checked out from source control and it removes anything in the designer file that refereces my menustrip or statusstrip ie: the following get removed (w/o warning) Me.MyMenuStip.SuspendLayout() Me.MyStatusStrip.SuspendLayout() Me.MyMenuStrip.ResumeLayout(False) Me.MyMenuStrip.PerformLayout() Me.MyStatusStrip.ResumeLayout(False) Me.MyStatusStrip.PerformLayout() The code still builds, but there are no Menu or Status items rendered. Any ideas on what i can do? I do not want to just remove/add the menustrip for instance cause i would loose all of my menu items (and there are a lot) Thanks in advance!

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  • Can I get the item type from a BindingSource?

    - by Preston
    I would like to get the Type of item that a BindingSource is hooked up to or configured for. The BindingSource.DataSource property can be set to an object, list, or type. If it is a Type, it obviously does not have an bound item yet, but I would still like to get the Type. For a List, I need the item Type, not the list type. There is a method BindingSource.GetItemProperties, that accomplishes most of what I need. It gets the PropertyDescriptors for the Type, list item, or object specified by the DataSource and DataMember. The reason I ask, is that I have some components that I would like to re-use, but they are currently setup to work off of an item Type. The Type is mainly used to get PropertyInfos and then build a UI, but PropertyInfo and PropertyDescriptor is not exactly the same, so it is not immediately apparent that they can be reworked to use a PropertyDescriptor collection instead. Then there is cascading refactoring of everything already using these components and that adds up to a lot of work that I would rather not do. I've looked through the API docs for for a good way to do this, but so far I have not had any luck. Am I missing something or is this just something I can not or should not be doing?

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  • Displaying Data on the Form with C#

    - by The.Anti.9
    I'm searching files and returning lines that include the search text, and I'm not really sure the best way to display the information I get. Every time I get a match, I want to show, in some sort of control, the File it came from, and the whole text line. (aka streamreader.ReadLine() result). First I tried just putting it all in a read-only text box, but it doesn't have a scroll bar. What is the best form control to help me display this data neatly?

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  • Updating UI objects in windows forms

    - by P a u l
    Pre .net I was using MFC, ON_UPDATE_COMMAND_UI, and the CCmdUI class to update the state of my windows UI. From the older MFC/Win32 reference: Typically, menu items and toolbar buttons have more than one state. For example, a menu item is grayed (dimmed) if it is unavailable in the present context. Menu items can also be checked or unchecked. A toolbar button can also be disabled if unavailable, or it can be checked. Who updates the state of these items as program conditions change? Logically, if a menu item generates a command that is handled by, say, a document, it makes sense to have the document update the menu item. The document probably contains the information on which the update is based. If a command has multiple user-interface objects (perhaps a menu item and a toolbar button), both are routed to the same handler function. This encapsulates your user-interface update code for all of the equivalent user-interface objects in a single place. The framework provides a convenient interface for automatically updating user-interface objects. You can choose to do the updating in some other way, but the interface provided is efficient and easy to use. What is the guidance for .net Windows Forms? I am using an Application.Idle handler in the main form but am not sure this is the best way to do this. About the time I put all my UI updates in the Idle event handler my app started to show some performance problems, and I don't have the metrics to track this down yet. Not sure if it's related.

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  • Get label height for fixed width

    - by Jonas
    Is there any way I can get the height of a label, if it hypothetically had a certain width? I've been trying with control.GetPreferredSize(size) like so: Dim wantedWidth as Integer = 100 dim ctrlSize as Size = label.GetPreferredSize(new Size(wantedWidth, 0)) because I thought that setting height = 0, would indicate a free height, but the height I get is way too small. I also tried to estimate the height of the label, using Graphics.MeasureString to calculate the equivalent area of the Label dim prefWidth as Integer = 100 dim estSize as SizeF = g.MeasureString(label.Text, label.Font) dim estHeight as Integer = (Integer)(estSize.Width * estSize.Height / prefWidth) but that yields the same result. Any ideas? I'm on .NET 2.0, unfortunately.

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  • Tootip steals mouse click

    - by deerchao
    I'm writing a custom TreeView from ScrollableControl. I decided to show tooltips when mouse is hover nodes with text too long to display. I find out when tooltips are shown, user would not be able to click the node to select it, because (I think) he's clicking the tooltip window, not my control. Is there any easy solutions? As I can see System.Windows.Forms.TreeView don't have this problem. Thanks!

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  • How to add a layer to a menuitem image

    - by alexander
    I have a menuitem with an image. I want to add half-transparent layer to that image. private void menuItem1_Paint(object sender, PaintEventArgs e) { using (SolidBrush brush = new SolidBrush(Color.FromArgb(128, SystemColors.ActiveCaption))) { e.Graphics.FillRectangle(brush, e.ClipRectangle); } } My problem is = I don't know clientrectangle of that image. e.ClipRectangle - it fills whole menuitem. I want to fill only image. How ? Is there another way, maybe ?

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  • Custom Controls Properties - C# , Forms - :(

    - by user353600
    Hi I m adding custom control to my flowlayoutpanel , its a sort of forex data , refresh every second , so on each timer tick , i m adding a control , changing controls button text , then adding it to flowlayout panel , i m doing it at each 100ms timer tick , it takeing tooo much CPU , here is my custom Control . public partial class UserControl1 : UserControl { public UserControl1() { InitializeComponent(); } private void UserControl1_Load(object sender, EventArgs e) { } public void displaydata(string name , string back3price , string back3 , string back2price , string back2 , string back1price , string back1 , string lay3price , string lay3 , string lay2price , string lay2 , string lay1price , string lay1 ) { lblrunnerName.Text = name.ToString(); btnback3.Text = back3.ToString() + "\n" + back3price.ToString(); btnback2.Text = back2.ToString() + "\n" + back2price.ToString(); btnback1.Text = back1.ToString() + "\n" + back1price.ToString(); btnlay1.Text = lay1.ToString() + "\n" + lay1price.ToString(); btnlay2.Text = lay2.ToString() + "\n" + lay2price.ToString(); btnlay3.Text = lay3.ToString() + "\n" + lay3price.ToString(); } and here is how i m adding control; private void timer1_Tick(object sender, EventArgs e) { localhost.marketData[] md; md = ser.getM1(); flowLayoutPanel1.Controls.Clear(); foreach (localhost.marketData item in md) { UserControl1 ur = new UserControl1(); ur.Name = item.runnerName + item.runnerID; ur.displaydata(item.runnerName, item.back3price, item.back3, item.back2price, item.back2, item.back1price, item.back1, item.lay3price, item.lay3, item.lay2price, item.lay2, item.lay1price, item.lay1); flowLayoutPanel1.SuspendLayout(); flowLayoutPanel1.Controls.Add(ur); flowLayoutPanel1.ResumeLayout(); } } now its happing on 10 times on each send , taking 60% of my Core2Duo cpu . is there any other way , i can just add contols first time , and then change the text of cutom controls buttons on runtime on each refresh or timer tick i m using c# .Net

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  • How to return string from a button click handler?

    - by riad
    I need to return a string from a button method .How can i do that? private string folderPathButton_Click(object sender, EventArgs e) { FolderBrowserDialog folderBrowser = new FolderBrowserDialog(); folderBrowser.ShowDialog(); string folderPath = folderBrowser.SelectedPath; return folderPath; } On that method on button click i get the folder path.Now i need to return it.But this code is not working? Can anybody help me to solve the problem??How can i return the folder path and call it from another method??

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  • How to get the form active control?

    - by PabloG
    Is there a way to get the form active control? I was checking in the help for the "Support.GetActiveControl" method but it isn't supported :) for the Compact Framework. I suppose that I can track the focus by adding a custom GotFocus event handler to all the form controls, but I'm looking for a more generic way that can be implemented for any form.

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  • Why do my horizontal toolstrips keep stacking verticaly?

    - by Eric
    I'm using a ToolStripContainer that contains three ToolStrips. At design time I move the ToolStrips to the positions I want them in, which is in a horizontal row across the top of the form like this: I then close and save the Form. However, if I open the form up again the ToolStrips end up stacked up on the left side of the ToolStripContainer like this: How can I keep the ToolStrips in the positions that I specify?

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  • C++ Constructor With Parameters Won't Initialize, Errors C2059 and C2228

    - by Some Girl
    I'm a C# programmer trying to muddle through C++ to create a Windows Forms Application. I have a Windows Form that makes use of a user-created class. Basically I'm trying to use a constructor that takes parameters, but my form won't let me initialize the object with parameter. Here's the code, hopefully somebody can explain the problem to me because I'm completely baffled... Here's my header file: BankAcct.h public ref class BankAcct { private: int money; public: BankAcct(); BankAcct(int); void Deposit(int); void GetBalance(int&); }; And my definition file: BankAcct.cpp #include "StdAfx.h" #include "BankAcct.h" BankAcct::BankAcct() { money = 0; } BankAcct::BankAcct(int startAmt) { money = startAmt; } void BankAcct::Deposit(int depAmt) { money += depAmt; } void BankAcct::GetBalance(int& balance) { balance = money; } And finally my main form. Won't copy the whole thing, of course, but I'm trying to declare the new bank account object, and start it with a balance of say $50. private: BankAcct myAccount(50); //does not work! WHY?? //private: //BankAcct myAccount; //works then in the form constructor my code is this: public: frmBank(void) { InitializeComponent(); int bal; myAccount.GetBalance(bal); lblBankBalance->Text += Convert::ToString(bal); } I've included the BankAcct.h file at the top of my frmBank.h, what else am I doing wrong here? It works great if I use the default constructor (the one that starts the bank balance at zero). I get the following error messages: error C2059: syntax error: 'constant' and error C2228: left of '.GetBalance' must have class/struct/union Thank you for any and all help on this one!!

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