ContextMenu CodeSample - Dynamic ContextMenu on a ListView
Categories: Menus, Lists & Grids, Skinnable and Inherited Controls
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Tags: Developers, Navigation, 1. Beginner, 2. Intermediate, Navigation, Pre v6.3, v6.3, v6.4 and Later, 3. Advanced
Revision:
1
Posted:
11/Dec/2009
Updated:
23/July/2010
Status:
Publish
Types: Code
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This article will have a few sections added to it soon, based on the following article type skeleton: CodeSampleThis CodeSample will demonstrate how you can use the ContextMenu.PopUp() event, along with ContextMenu.Show() to create dynamic ContextMenuListViewItems. The dynamic ContextMenus are created on demand, when a ListViewItem is Right-Clicked.
Samples of useFor the complete code, please view the demo application. The piece of code shown here, is the event handler for the ContextMenu.Popup event, which handles the dynamic creation of the ContextMenus and shows it.
VB.NET Code
Private Sub ContextMenu1_Popup(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ContextMenu1.Popup
Dim cm1 As Gizmox.WebGUI.Forms.ContextMenu = New Gizmox.WebGUI.Forms.ContextMenu
Dim mi1 As Gizmox.WebGUI.Forms.MenuItem = New Gizmox.WebGUI.Forms.MenuItem
Dim mi2 As Gizmox.WebGUI.Forms.MenuItem = New Gizmox.WebGUI.Forms.MenuItem
cm1.MenuItems.AddRange(New Gizmox.WebGUI.Forms.MenuItem() {mi1, mi2})
mi1.Index = 0
mi1.Text = "A " + DateTime.Now.ToString()
mi2.Index = 1
mi2.Text = "B " + DateTime.Now.ToString()
If ListView1.SelectedItem Is Nothing Then
cm1.Show(ListView1, New System.Drawing.Point(0, 0), DialogAlignment.Below)
Else
cm1.Show(ListView1.SelectedItem, New System.Drawing.Point(0, 0), DialogAlignment.Below)
End If
End Sub
C# Code
private void contextMenu1_Popup(object sender, EventArgs e)
{
Gizmox.WebGUI.Forms.ContextMenu cm1 = new Gizmox.WebGUI.Forms.ContextMenu() ;
Gizmox.WebGUI.Forms.MenuItem mi1 = new Gizmox.WebGUI.Forms.MenuItem();
Gizmox.WebGUI.Forms.MenuItem mi2 = new Gizmox.WebGUI.Forms.MenuItem();
cm1.MenuItems.AddRange(new Gizmox.WebGUI.Forms.MenuItem[] {mi1,mi2});
mi1.Index = 0;
mi1.Text = "A " + DateTime.Now.ToString();
mi2.Index = 1;
mi2.Text = "B " + DateTime.Now.ToString();
if (ListView1.SelectedItem == null )
{
cm1.Show(ListView1, new System.Drawing.Point(0, 0), DialogAlignment.Below);
}
else
{
cm1.Show(ListView1.SelectedItem, new System.Drawing.Point(0, 0), DialogAlignment.Below);
}
}
The demo applicationA small trick is used in the sample to make the ContextMenu.PopUp getting fired. If you do not assign any ContextMenu a ListViewItem, no popup menu will fire. So, by creating an empty ContextMenu and assigning that same ContextMenu to the ListViewItem, the event gets fired. You will not use that ContextMenu all for other purposes, and you should leave it empty, else you might get flickering in your app, and need to take care of hiding it, right after it is shown, to get your dynamic menu shown instead. SDK Version highlightsRererencesCode samples
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This video demonstrates how to create and use a context menu in Visual WebGui.
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Developers, 1. Beginner, Pre v6.3, v6.3, v6.4 and Later, 2. Intermediate, 3. Advanced
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Tags:
Developers, Navigation, 1. Beginner, 2. Intermediate, Pre v6.3, v6.3, v6.4 and Later, 3. Advanced
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Tags:
Developers, Navigation, 1. Beginner, 2. Intermediate, Pre v6.3, v6.3, v6.4 and Later, 3. Advanced
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Tags:
Architects, Developers, Navigation, 1. Beginner, 2. Intermediate, 3. Advanced, Navigation, Pre v6.3, v6.3, v6.4 and Later
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Tags:
Architects, Developers, Navigation, 1. Beginner, 2. Intermediate, 3. Advanced, Pre v6.3, v6.3, v6.4 and Later
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Tags:
Developers, 1. Beginner, 2. Intermediate, Customization, Pre v6.3, v6.3, v6.4 and Later, 3. Advanced
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