DevExpress-Examples / asp-net-web-forms-grid-cascading-comboboxes-for-each-row

Create cascading combo boxes for each row of the ASPxGridView control.

Grid View for ASP.NET Web Forms - How to implement cascading combo boxes in grid

This example demonstrates how to create cascading combo boxes for each row of the ASPxGridView control.

To implement the cascading behavior between a pair of ASPxComboBox controls defined within the same row, editor settings are specified dynamically in the Init event.

protected void cmbMaster_Init(object sender, EventArgs e) {
    ASPxComboBox cmbParent = (ASPxComboBox)sender;
    GridViewDataItemTemplateContainer templateContainer = (GridViewDataItemTemplateContainer)cmbParent.NamingContainer;
    cmbParent.ClientSideEvents.SelectedIndexChanged = string.Format("function(s, e) {{ OnSelectedIndexChanged(s, e, {0}); }}", templateContainer.VisibleIndex);
}
protected void cmbChild_Init(object sender, EventArgs e) {
    ASPxComboBox cmbChild = (ASPxComboBox)sender;
    GridViewDataItemTemplateContainer templateContainer = (GridViewDataItemTemplateContainer)cmbChild.NamingContainer;
    cmbChild.ClientInstanceName = string.Format("cmbChild_{0}", templateContainer.VisibleIndex);
    cmbChild.Callback += new DevExpress.Web.CallbackEventHandlerBase(cmbChild_Callback);
}

Files to Review

• Default.aspx (VB: Default.aspx)
• Default.aspx.cs (VB: Default.aspx.vb)

Documentation

• Access Controls in Templates on the Server

Online Demos

• Grid - Cascading Editors
• Grid - Cascading Editors (Batch Editing)

More Examples

• Combo Box for ASP.NET Web Forms - How to implement cascading combo boxes
• How to refer to a client-side control encapsulated in a specific instance of UserControl

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