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  • DataGridView fails SelectedCells property

    - by ghiboz
    Hi! in my project I have 3 DataGridView and I need to retrieve the SelectedCells of the grid in 2 grids this works fine, but in one ( and the code is exactly the same of the other 2) the grid.SelectedCells.Count is 1 but If I go in the inspector to view which cell is selected, the result is 0,0... thanks

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  • Painting to Form then to Printer

    - by jp2code
    I often find myself needing to create custom reports that do NOT work with Crystal Reports or Report Viewer. Often, I hack a DataTable together and dumping that into a DataGridView control. It is never pretty, and printing is difficult. What I need is a class that I can call using the OnPaint event, but I've never sat down and written all of the Pen and Brush commands until now. Painting to the screen and painting to a printer both use the Graphics object, so I want to build a class that I'd pass in the Graphics object, my window bounds (a Rectangle), and some data (in the form of an instance of my class) that I'd use to paint a form or a sheet of paper. That sounds like a great concept! Surely, someone has done something like this before. Does anyone know of a book, a website tutorial, or video that goes into this? If someone wants to write all that out for me here, more power to you - but I'd think that would be too much work.

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  • Easiest way to merge a changed list to the master list

    - by Kiran Chandrashekhar
    I have a two lists of class object : private List<IntVector> UserData = new List<IntVector>(); private List<IntVector> EditData = new List<IntVector>(); UserData is the Master List and EditData is another list which would be used to add, delete, or modify the list. One of the class memeber is CaseNo which would not change for an IntVector. I have made changes in the EditData and would like to merge the changes to the UserData. Any idea how to do it ?

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  • Change the style of WinForm border?

    - by Dodi300
    Is it possible to change the style of a WinForm border? I know that if the border is removed, it takes away the functionality to resize the program. Therefore is there a way to change the style of it? At the moment, I've removed the text from the border, set the "FormBorderStyle" to "SizableToolWindow" and set the "ControlBox" to false. That makes it look like this: But I want it to look something like this, but still be resizeable: (Maybe with a different color line)

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  • Read text file into listbox collections

    - by Arcadian
    Hi, i'm new to C#. I need my program to show different parts of the data contained in a txt file into different listboxs (which are on different tabs of a form) so that the user can see the particular block of data they are interested in. the data contained in the txt file looks like this: G30:39:03:31 JG06 G32:56:36:10 JG04 G31:54:69:52 JG04 G36:32:53:11 JG05 G33:50:05:11 JG06 G39:28:81:21 JG01 G39:22:74:11 JG06 G39:51:44:21 JG03 G39:51:52:22 JG01 G39:51:73:21 JG01 G35:76:24:20 JG06 G35:76:55:11 JG01 G36:31:96:11 JG02 G36:31:96:23 JG02 G36:31:96:41 JG03 though much more of it :) The separate listboxes will contain only the lines who's first integer pair matches that listbox's name. For example, all the lines that start "G32" will be added to the G32 listbox. I think the code would start something like: private void ReadToBox() { FileInfo file = new FileInfo("Jumpgate List.JG"); StreamReader objRead = file.OpenText(); while (!objRead.EndOfStream) but i'm not sure where to start in terms of getting it sorted yet. Any help? There's some rep in it for you :D

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  • Access Edit Mode Values of BindingSource Control

    - by Christopher Edwards
    I have a BindingSource control (http://msdn.microsoft.com/en-us/library/system.windows.forms.bindingsource.aspx) with a datasource of a (single) Linq object. If I change any of the properties of the underlying Linq-to-Sql object then all the other changes on the bound controls on the form are lost. Does anyone now why and how I work around it? I don't want to call EndEdit because this will commit the changes to the underlying object. I think this might be because my underlying object linq-to-sql object does not implement IEditableObject so the potental new values for the object fields are sort of stored in the forms controls. Can anyone either clarify what is going on and/or suggest a work around. Thanks!

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  • Change color of text within a RichTextBox in C#

    - by Addie
    I have a RichTextBox that I write a string to every time I click a Form button. The string ends with a newline so each time I add a string, it appends to the bottom of the RichTextBox. Each string begins with the string "Long" or "Short" and ends with Environment.NewLine. I'd like to color each line red if it beings with "Long" and blue if it begins with "Short". How can I do this? If you need further clarification of the question comment below.

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  • Close box triggers validation for non-modal form

    - by Governor
    I have two form classes inheriting from a common base. One of the forms is called modally and the other non-modally. Validation is required on focus changes but not when the form is cancelled. When the Close Box is selected on the modal form it closes properly without any validation being triggered on it's controls. When the Close Box is selected on the non-modal form, validation events are triggered. A Cancel button with CausesValidation set false works fine in both cases. I have tried setting CausesValidation on the non-modal form to false but the problem remains. I should mention that the forms are mdi children. Any ideas? Thx.

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  • DataGridView with row-specific DataGridViewComboBoxColumn contents in C# Windows Forms 3.5

    - by XXXXX
    So I have something like the following data structure (constructors omitted) class Child { public string Name { get; set; } public int Age { get; set; } } class Parent { public string Name { get; set; } public List <Child> Children { get; private set; } // never null; list never empty public Child FavoriteChild { get; set; } // never null; always a reference to a Child in Children } List < Parent > Parents; What I want to do is show a DataGridView where each row is a Parent from Parent list. Each row should have two columns: a text box showing the parent's name and a DataGridViewComboBoxColumn containing that parent's children, from which the user can select the parent's favorite child. I suppose I could do the whole thing manually, but I'd like to do all this with more-or-less standard Data Binding. It's easy enough to bind the DataGridView to the list of parents, and easy enough to bind the selected child to the FavoriteChild property. The part that's giving me difficulty is that it looks like the Combo Box column wants to bind to one data source for all the combo-box's contents on all rows. I'd like each instance of the combo box to bind to the list of each parent's children. I'm fairly new to C#/Windows Forms, so I may well be missing something obvious. Or it could be that "you can't get there from here." It's not too tough to make a separate list of all the children and filter it by parent; I'm looking into that possibility right now. Is this feasible, or is there a better way?

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  • C# NotifyIcon behaviour on Windows 7 with MouseClick, MouseDoubleClick events

    - by binball
    Hi, I have strange behaviour with my app after run it on Windows 7. It's connected with NotifyIcon while app is minimized. What should happens: 1) Click once on icon with mouse left button then Balloon with some text should appears 2) Double click on icon will show again app window On Windows 7 MouseDoubleClick is also fired but window is not showing. I don't know why. The same code works good on Windows XP. private void notifyIcon_MouseClick(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { this.NotifyIconShowBalloonWithData(); } } private void notifyIcon_MouseDoubleClick(object sender, MouseEventArgs e) { this.Show(); WindowState = FormWindowState.Normal; notifyIcon.Visible = false; } What did I wrong? :) Thanks in advance for your answer.

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  • NotifyIcon behaviour on Windows 7 with MouseClick, MouseDoubleClick events

    - by binball
    I have strange behaviour with my app after run it on Windows 7. It's connected with NotifyIcon while app is minimized. What should happens: 1) Click once on icon with mouse left button then Balloon with some text should appears 2) Double click on icon will show again app window On Windows 7 MouseDoubleClick is also fired but window is not showing. I don't know why. The same code works good on Windows XP. private void notifyIcon_MouseClick(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { this.NotifyIconShowBalloonWithData(); } } private void notifyIcon_MouseDoubleClick(object sender, MouseEventArgs e) { this.Show(); WindowState = FormWindowState.Normal; notifyIcon.Visible = false; } What did I wrong? :)

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  • WinAPI magic (TCM_ADJUSTRECT message) and MONO runtime

    - by Luca
    I'm trying to get the same result of a .NET application (see the link Hide TabControl buttons to manage stacked Panel controls for details), but using the MONO runtime instead of the MS .NET runtime. Pratically, when the custom control is executed using the MONO runtime, the underlying message is not sent to the control, causing the tab pages to be shown... There is a portable solution which is elegant as the linked one? If it is not possible, what are possible workarounds (apart from removing/adding tabs at runtime)?

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  • Need to convert int value to hex value

    - by SA
    Hi, I need to convert char to hex values. Refer to the Ascii table but I have a few examples listed below: int 1 = 31 2 = 32 3 = 33 4 = 34 5 = 35 A = 41 a = 61 etc Therefore int test = 12345; Need to get the converted i = 3132333435

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  • WPF DataGrid Vs Windows Forms DataGridView

    - by Mrk Mnl
    I have experience in WPF and Windows Forms, however have only used the Windows Forms DataGridView and not the WPF DataGrid (which was only included in .Net 4 or could be added to .Net 3.5 from Codeplex, I understand). I am about to devlop an app using one of these controls heavily for large amounts of data and have read performance is an issue with the WPF DataGrid so I may stick to the Windows Forms DataGridView.. Is this the case? I do not want to use a 3rd party control. Does the Windows Forms DataGridView offer significant performance over the WPF DataGrid for large amounts of data? If I were to use WPF I would prefer to use .Net 3.5S SP1, unless the DataGrid in the .Net 4 is significantly better? Also I want to use ADO with DataTable's which I feel is better suited to Windows Forms..

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  • One config file for multiple environments

    - by ho
    I'm currently working with systems that has quite a lot of configuration settings that are environment specific (Dev, UAT, Production). Does anyone have any suggestions for minimizing the changes needed to the config file when moving between environments as well as minimizing the duplication of data in the config file? It's mostly Application settings rather than User settings. The way I'm doing it at the moment is something similar to this: <DevConnectionString>xyz</DevConnectionString> <DevInboundPath>xyz</DevInboundPath> <DevProcessedPath>xyz</DevProcessedPath> <UatConnectionString>xyz</UatConnectionString> <UatInboundPath>xyz</UatInboundPath> <UatProcessedPath>xyz</UatProcessedPath> ... <Environment>Dev</Environment> And then I have a class that reads in the Environment setting via the My.Settings class (it's VB project) and then uses that to decide what other settings to retrieve. This leads to too much duplication though so I'm not sure if it's worth it.

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  • TextBox change is not saved to DataTable

    - by SeaDrive
    I'm having trouble with a simple table edit in a Winform application. I must have missed a step. I have a DataSet containing a DataTable connected to a database with a SqlDataAdapter. There is a SqlCommandBuilder on the SqlDataAdapter. On the form, there are TextBoxes which are bound to the DataTable. The binding was done in the Designer and it machine-produced statements like this: this.tbLast.DataBindings.Add(new System.Windows.Forms.Binding("Text", this.belkData, "belk_mem.last", true)); When I fill the row in the DataTable, the values from the database appear in the textboxes, but when I change contents of the TextBox, the changes are apparently not being going to the DataTable. When I try to save change both of the following return null: DataTable dtChanges = dtMem.GetChanges(); DataSet dsChanges = belkData.GetChanges(); What did I forget? Edit - response to mrlucmorin: The save is under a button. Code is: BindingContext[belkData, "belk_mem"].EndCurrentEdit(); try { DataSet dsChanges = belkData.GetChanges(); if (dsChanges != null) { int nRows = sdaMem.Update(dsChanges); MessageBox.Show("Row(s) Updated: " + nRows.ToString()); belkData.AcceptChanges(); } else { MessageBox.Show("Nothing to save.", "No changes"); } } catch (Exception ex) { MessageBox.Show("Error: " + ex.Message); } I've tried putting in these statements without any change in behavior: dtMem.AcceptChanges(); belkData.AcceptChanges();

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  • When should I be cautious using data binding in .NET?

    - by Ben McCormack
    I just started working on a small team of .NET programmers about a month ago and recently got in a discussion with our team lead regarding why we don't use databinding at all in our code. Every time we work with a data grid, we iterate through a data table and populate the grid row by row; the code usually looks something like this: Dim dt as DataTable = FuncLib.GetData("spGetTheData ...") Dim i As Integer For i = 0 To dt.Rows.Length - 1 '(not sure why we do not use a for each here)' gridRow = grid.Rows.Add() gridRow(constantProductID).Value = dt("ProductID").Value gridRow(constantProductDesc).Value = dt("ProductDescription").Value Next '(I am probably missing something in the code, but that is basically it)' Our team lead was saying that he got burned using data binding when working with Sheridan Grid controls, VB6, and ADO recordsets back in the nineties. He's not sure what the exact problem was, but he remembers that binding didn't work as expected and caused him some major problems. Since then, they haven't trusted data binding and load the data for all their controls by hand. The reason the conversation even came up was because I found data binding to be very simple and really liked separating the data presentation (in this case, the data grid) from the in-memory data source (in this case, the data table). "Loading" the data row by row into the grid seemed to break this distinction. I also observed that with the advent of XAML in WPF and Silverlight, data-binding seems like a must-have in order to be able to cleanly wire up a designer's XAML code with your data. When should I be cautious of using data-binding in .NET?

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  • Using a WinForm as a Windows Installer Custom Action

    - by Serexx
    Hello - I am working on in installer project that needs to gather some info and act on it during the install (mainly online key retreival and registration). The Setup Project UserInterface templates seem inflexible and poorly documented so I am looking at opening a WinForm as a Custom Action. I know this is possible because I see reference to it in many places but this is my first Windows Installer experience and so far it is mired in googled contradictions, partial or outdated information and guesswork... erg.... Does anyone have (even a pointer to) a clear concise description of how one gets this done in a VS 2008 WinForm project... Many thanks for inputs

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  • anyone research DevExpress' source code ?

    - by MemoryLeak
    I want to study the source code of DevExpress, does anyone have any information about that ? Since I really don't know how to start to read it. if you are also researching the source code of devexpress and you would share it on your blog, then could you please give me your blog link ? EDIT: once you purchase the universal version it will offer you the source for debugging, please refer to https://www.devexpress.com/ClientCenter/Order/default.aspx?group=.NET

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  • Failing to send key presses to a running process in C#

    - by Waffles
    I'm using the following code to put the focus on a window (in this case, a notepad window), and sending some key presses to it everytime button 2 is clicked. However, when I press button 2, nothing happens. Can anyone tell my why my sendkeys command is failing? public partial class Form1 : Form { [DllImport("user32.dll")] static extern bool ShowWindow(IntPtr hWnd, int nCmdShow); private Process s; public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { this.s = new Process(); s.StartInfo.FileName = "notepad"; s.Start(); s.WaitForInputIdle(); } private void button2_Click(object sender, EventArgs e) { ShowWindow(s.MainWindowHandle, 1); SendKeys.SendWait("Hello"); } }

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  • Simple Windows.Forms binding is failing using framework 4.0.

    - by jyoung
    This works under the .net framework 3.5 client. This fails under the .net framework 4.0 client. Was I doing something that was illegal under 3.5 but just happened to work, or is this a bug? Note that in my project 'PropInt' does not raise change events so using ctx[obj1.PropObj2, "PropInt"] is not an option. public class Obj1 { public Obj2 PropObj2 { get; set; } public Obj1() { PropObj2 = new Obj2(); } } public class Obj2 { public int PropInt { get; set; } } static class Program { [STAThread] static void Main() { var ctx = new BindingContext(); var obj1 = new Obj1(); var x1 = ctx[obj1, "PropObj2.PropInt"]; } }

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  • How can I make the WebBrowser control navigate to a specific webpage?

    - by tee
    How can I make the code when run the code it go to samsung.com private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e) { webBrowser1.Navigate("www.samsung.com"); } Please correct it when run program it go to samsung.com using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using mshtml; namespace webhiglight { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e) { webBrowser1.Navigate("www.samsung.com"); } private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { if (webBrowser1.Document != null) { IHTMLDocument2 document = webBrowser1.Document.DomDocument as IHTMLDocument2; if (document != null) { IHTMLSelectionObject currentSelection = document.selection; IHTMLTxtRange range = currentSelection.createRange() as IHTMLTxtRange; if (range != null) { const String search = "ant"; if (range.findText(search, search.Length, 2)) { range.select(); } } } } } } }

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