RadGrid for ASP .NET version
RadControls for ASP .NET AJAX version |
4.6.2 and later
2008.1.415 and later |
| .NET version |
2.0 and later
|
| Visual Studio version |
2005 and later
|
| programming language |
C#
|
| Browser support |
all supported by RadGrid for ASP .NET
all browsers supported by RadControls for ASP .NET AJAX
|
PROJECT DESCRIPTION
This project shows how to extend GridTemplateColumn, so that it can be used to filter boolean values with images in the filtering item. Here are the basic steps:
- Extend GridTemplateColumn, provide the image buttons which will be used for filtering.
| protected override void SetupFilterControls(TableCell cell) |
| { |
| ImageButton but = new ImageButton(); |
| but.ID = "TrueButton" + this.UniqueName; |
| but.ImageUrl = "~/true.gif"; |
| but.Click += new ImageClickEventHandler(butTrue_Click); |
| but.ToolTip = "True"; |
| cell.Controls.Add(but); |
| ........ |
- Use a hidden field to store CurrentFilterValue
- Handle each ImageButton Click event handler to set CurrentFilterFunction and CurrentFilteValue:
| void butTrue_Click(object sender, ImageClickEventArgs e) |
| { |
| this.CurrentFilterFunction = GridKnownFunction.EqualTo; |
| this.CurrentFilterValue = "true"; |
| Pair arg = new Pair(GridKnownFunction.EqualTo.ToString(), this.UniqueName); |
| SetCurrentFilterValueToControl(((sender as Control).Parent as TableCell)); |
| |
| ((sender as Control).NamingContainer as GridFilteringItem).FireCommandEvent(RadGrid.FilterCommandName, arg); |
| } |
This would not interfere with sorting functionality. A grouping expression is required for grouping, as shown in the attached project.
Note: For 3.5/4.0 projects Grid.EnableLinqExpressions should be set to "false".