.NET GENES

Hi, There's a post in codeproject that will host a datagridview in a combobox. It is in vb.net and I converted it to C#. I made some changes on the custom controls to retrieve the datagridview selected row. This was not provided in the author's post, so I made some changes myself. In total, the control was purely awesome. So, here's the C# equivalent. I won't be posting all the codes since the custom control is posted in codeproject. I'll be posting the main class instead. Credits: Niemand25 of Lithuania using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; using System.Reflection; namespace MyGridComboBoxCSharp { [ToolboxItem(true)] [ToolboxBitmap(typeof(ComboBox))] [DefaultBindingProperty("SelectedValue")] [LookupBindingProperties("DataSource", "

Here's a tip from CODE PROJECT on positioning message box. This utilize c++ dlls. using System.Runtime.InteropServices; using System.Threading; [DllImport("user32.dll")] static extern IntPtr FindWindow(IntPtr classname, string title); // extern method: FindWindow [DllImport("user32.dll")] static extern void MoveWindow(IntPtr hwnd, int X, int Y, int nWidth, int nHeight, bool rePaint); // extern method: MoveWindow [DllImport("user32.dll")] static extern bool GetWindowRect(IntPtr hwnd, out Rectangle rect); // extern method: GetWindowRect void FindAndMoveMsgBox( int x, int y, bool repaint, string title) { Thread thr = new Thread(() => // create a new thread { IntPtr msgBox = IntPtr.Zero; // while there's no MessageBox, FindWindow returns IntPtr.Zero while ((msgBox = FindWindow(IntPtr.Zero, title)) == IntPtr.Zero) ; // after the while loop, msgBox is

Assuming you already get the pointer handle of the textbox/richtextbox control from source calling function, the snippet to get the content of the edit control is as follows. public const int GWL_ID = -12; public const int WM_GETTEXT = 0x000D; [DllImport("User32.dll")] public static extern int GetWindowLong(IntPtr hWnd, int index); [DllImport("User32.dll")] public static extern IntPtr SendDlgItemMessage(IntPtr hWnd, int IDDlgItem, int uMsg, int nMaxCount, StringBuilder lpString); [DllImport("User32.dll")] public static extern IntPtr GetParent(IntPtr hWnd); private StringBuilder GetRichEditText(IntPtr hWndRichEdit) { Int32 dwID = GetWindowLong(hWndRichEdit, GWL_ID); IntPtr hWndParent = GetParent(hWndRichEdit); StringBuilder title = new StringBuilder(128); SendDlgItemMessage(hWndParent, dwID, WM_GETTEXT, 128, title); return title; } Greg

Here's a simple class implementation of a DatagridviewCheckboxColumn. public class DatagridviewCustomCheckboxColumn : DataGridViewCheckBoxColumn { public DatagridviewCustomCheckboxColumn() { this .CellTemplate = new DatagridviewCheckboxCustomCell(); } } class DatagridviewCheckboxCustomCell : DataGridViewCheckBoxCell { public int row_index { get ; set ; } public int CheckboxHeight { get { //your_desired_checkbox_height is a variable //that contains the desired height of your checkbox //you may set or get the property value.. return your_desired_checkbox_height; } } public int CheckboxWidth { get { //your_desired_checkbox_width is a variable //that contains the desired width of your checkbox //you may set or get the property value.. return your_desired_che

Hello, You might have a row in the DataGridView typically the last one that computes total and the grid control is unbound to a datasource. And then if a sorting event occurs, you dont' wanna include that row during sort event. So given that your application has a form and a DataGridView control, the code to perform databinding is handled in the Form Load Event. DataGridViewRow dgRowTotalCount; DataTable dataTable; private void Form1_Load ( object sender, EventArgs e) { DataTable dt = new DataTable( "tblEntTable" ); dt.Columns.Add( "ID" , typeof ( string )); dt.Columns.Add( "Amount" , typeof ( decimal )); dt.Rows.Add( new object [] { "1" , 100.51 }); dt.Rows.Add( new object [] { "2" , 200.52 }); dt.Rows.Add( new object [] { "6" , 500.24 }); dt.Rows.Add( new object [] { "8" , 1000.11 }); dt.Rows.Add( new object [] { "4" , 400.31 }); dt.Rows.Add( new object [] { "5" , 6

Here's the code to apply font weight and font color to your datagridview cell. DataGridViewCellStyle style = new DataGridViewCellStyle(); style.ForeColor = Color.Red; style.Font = new Font( this .Font, FontStyle.Bold); dg.Rows[dg.Rows.Count - 1].Cells[i + 2].Style = style;

This snippet will check if mouse coordinate is outside the form coordinates in mouseup event using the object's ClientRectangle property. private void dgvScriptsTime_MouseUp( object sender, MouseEventArgs e) { if (! this .ClientRectangle.Contains(e.Location)) { FShowGrid showGrid = new FShowGrid( "Test" , dgvScriptsTime); showGrid.ShowDialog(); } }

In a program i'm working with, I have a timer event which draws lines or graphs on a picture box. This picture box is inside a tab and panel. When I switched views to other tabs and return to the tab that has the picture box, the previous lines or graphs disappears. I suspect, the controls are redrawn when switching tabs. I tried several solutions and options in picture box paint event and infact tried overriding it. Same results. Luckily, I found a tip in an article to draw the real time graphics on the image itself. This helped solve the issue. Greg

Here's the snippet to limit flicker in forms. Put it above the initialize component method in your constructor. //limit flicker SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true ); InitializeComponent(); Cheers! Source: mijalko

Assuming you will access the toolstrip button from another thread, then here's the code on how to enable or disable ToolstripButton using delegates. delegate void EnableDisableButtonRunDeleg( bool value ); private void EnableDisableButtonRun( bool value ) { if (tsMenu.InvokeRequired) { this .tsMenu.Invoke( new EnableDisableButtonRunDeleg (EnableDisableButtonRun), value ); } else { ToolStripItem ts = tsMenu.Items[0]; ((ToolStripButton)ts).Enabled = value ; } } Cheers!

I added the snippet below in the columnwidthchanging event: switch (e.ColumnIndex) { case 0: e.NewWidth = 400; break ; case 1: e.NewWidth = 200; break ; case 2: e.NewWidth = 100; break ; case 3: e.NewWidth = 100; break ; default : break ; } e.Cancel = true ; Where 400, 200, and 100 are the original column sizes.

Textbox properites: autocompletemode = append, autcompletesource = customsource. Assuming the autocompletestringcollection of the textbox are as follows: James Philipp Mariah Clara 8 Ryan GregEsguerra If you type the number 8 in the textbox, the textbox autocomplete does not suggest. As defined, it will search the prefix of the source. So, i guess one character does not have a prefix at all. The workaround for this is to add a space character after the digit 8. So, "8" becomes "8 ". Below is the code: private void PopulateWebsiteName() { try { if (dtWebsiteNames != null ) { dtWebsiteNames.Clear(); } dtWebsiteNames = JobsReporting.Scripts.GetWebsiteNamesLocal(); if (dtWebsiteNames.Rows.Count > 0) { foreach (DataRow row in dtWebsiteNames.Rows) { if (row[1].ToString().Trim().Length == 1) { row[1] = row[1]

Here's a snippet on how to prevent or disable winforms form object from being resized at design time. this .MaximumSize = new System.DrawingSize(500, 400); this .MinimumSize = new System.DrawingSize(500, 400);

To use or access the HttpUtility class in C# winforms, do the following: 1. Add reference to System.Web dll 2. Use any methods available in HttpUtility class. System.Web.HttpUtility.HtmlDecode(mystring); System.Web.HttpUtility.UrlDecode(mystring); Cheers!