about drop downlist ?

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Can any One Tell which event ocur when selecting on dropdownlist item and changing form control means eg. when selecting one of the item in ddlist then one of the control in form is visible true or false...

Posted 12-Oct-15 0:29am

ASPDevloper

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[no name] 12-Oct-15 7:04am

SelectedIndexChanged() is the method you are searching for.

2 solutions

Solution 1

It's the ListControl.SelectedIndexChanged[^] event.

Posted 12-Oct-15 0:42am

Palash Mondal_

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Arasappan · Accepted Answer · 2015-10-12T01:03:00

XML

<asp:DropDownList ID="ddl" runat="server"  onselectedindexchanged="ddl_SelectedIndexChanged" AutoPostBack="true">
       </asp:DropDownList>

C#

protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
   {
    if(ddl.SelectedItem.Text="Yes")
      {
        txt_box1.Visible=true;
      }
   }

Note:-Autopostback="true" is compulsary,

Go to design view of ur form double click on it,you get the selected index changes code block in code behind