How to handle Drop-Down event in Repeater control

Prasham Sabadra

In my project I have to handle the event of drop-down control in repeater control and also want the current item index. I get how to handle the event but I need to burn my midnight's oil to get the current item index and finally I got the solution using NamingContainer property.

Following is the sample code for repeater control and drop-down control in it

<asp:Repeater ID="myRepeater" runat="server">

<asp:DropDownList ID="myDropdown" runat="server" AppendDataBoundItems="true" AutoPostBack="true" OnSelectedIndexChanged="myDropdown_SelectedIndexChanged">

</asp:DropDownList>

</ItemTemplate>

</asp:Repeater>

Added the event myDropdown_SelectedIndexChanged to the code behind as follows :

protected void myDropdown_SelectedIndexChanged(object sender, EventArgs e)

{

// Get the drop down instance as follows

DropDownList myDropdown = sender as DropDownList;

// Get the current item index

int currentItemIndex = ((RepeaterItem)drpVariants.NamingContainer).ItemIndex;

}

Here we are getting the RepeaterItem using the Namingcontainer property. Here Repeater control is naming container. i.e. - it provides unique ids to its child controls. Here is the very good blog on NamingContainer.

Repeater Control RepeaterDrop-Down event in Repeater controlNamingContainer

4 Comments

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Pratik Patel10y ago
Int currentItemIndex = ((RepeaterItem)drpVariants.NamingContainer).ItemIndex; what is drpVariants????????
Sr Karthiga10y ago
good one
Sr Karthiga10y ago
nice explanation
Asfend Yar10y ago
good