This sample ( download C# , download VB ) derives two custom columnstyles that display buttons. One displays a pushbutton with the cell text used as the button label. The second columnstyle displays text plus a dropdown button similar to a combobox button...

There are several ways to go about this task. The simplest way involves adding a single combobox to the DataGrid.Controls, and then selectively displaying it as needed when a combobox cell becomes the currentcell. All the work is done in a few event handlers...

There is no text property exposed for a rowheader cell. But you can handle the Paint event and draw header text yourself. You can download sample projects ( C# , VB ) that illustrate one technique for doing so. The sample loads the DataGrid in the form's... Set the DataGrid.AllowNavigation property to false. Contributed from George Shepherd's Windows Forms FAQ

lt;asp:DataGrid id="DataGrid1" OnItemDataBound="ItemDB" ShowFooter =true runat="server"></asp:DataGrid> Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load The wrap functionality occurs for each cell and not for each row of the DataGrid. Therefore, if you disabled the wrap functionality for all of the DataGrid, text wrapping functionality is not disabled for every row or column.

When you go to a new row in a DataGrid, the columns display (null). To prevent this behavior and make all the columns be empty, you can set the DefaultValue property of the DataColumn to be String.Empty.

lt;asp:DataGrid id="DataGrid1" OnItemDataBound ="ItemDB" DataKeyField ="ProductId" runat="server"></asp:DataGrid> Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Protected Sub ItemDB(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) e.Item.Cells[dc.IndexOf(dc[dcCol.ColumnName])].Attributes.Add("onclick", "javascript:window.open('details.aspx?id= "+strID+"',"+"'MyPage','height=300,width=300')");

Here is a sample ( C# , VB ) that has column selections implemented. It derives a DataGrid, adds a columns selection array list, and maintains this list in an override of OnMouseDown. Then to handle actually drawing the selected columns, it uses a derived...

You create a custom DataTableStyle that contains column styles for each column you want to display. You add the column styles in the order you want them to appear. Here are the steps to add an string column, an int column and a bool check column to a...

You need to derive a custom column style, override its Paint method and draw the image. In the attached samples, ( VB and C# ), there are two custom column styles. One style is a stand-alone unbound column that just displays an image. The second custom...

If you have added a table style to your DataGrid (so individual column styles have been generated), then you can use code such as this to set the Format property of the particular column style. [C#] // add format column 3 columnstyle where column 3 holds...

You can derive a custom columnstyle and override its Paint method to draw the image. Here are both C# and VB.Net samples . The Paint override offers three ways to draw the bimap in the cell; size it to fit the cell bounds, size it proportionally to fit...

One way to do this is to use MeasureString to compute the size of the text in each cell, and then take the maximum value. Below is a code snippet that does this. It assumes your datagrid is bound to a datatable. You can download a full working sample...

To set a column width, your DataGrid must be using a non-null DataGridTableStyle. Once this is in place, you can set the column width by first getting the tablestyle and then using that object to obtain a column style with which you can set the width...

There are several ways to hide a column: 1) You can use your DataSet's ColumnMapping property to hide a column. // Creating connection and command sting string conStr = @"Provider=Microsoft.JET.OLEDB.4.0;data source=C:\northwind.mdb"; string...

You need to derive a custom column style, override its Paint method and draw the image. In the attached samples, (VB and C#), there are two custom column styles. One style is a stand-alone unbound column that just displays an image. The second custom column style adds the image to the left side of a bound column. In both cases, the actual image that is displayed is from an imagelist passed into the column in its constructor.