Question

I have dropdownlist inside a repeater and whenever the selected text is changed i have to show it in a textbox how can i do this??

 protected void Repeater1_ItemCreated(object sender, RepeaterItemEventArgs e)
{
    DropDownList ddl = (DropDownList)e.Item.FindControl("DropDownList6");
    TextBox txt = (TextBox)e.Item.FindControl("TextBox4");
    txt.Text = ddl.SelectedItem.Text;
}

Answer 1

First, don’t use ItemCreated therefore since it triggered too early in the life-cycle(for the ViewState). You would also have to check for the ItemType first.

Instead use the DropDownLists SelectedIndexChanged event directly:

protected void Ddl_SelectedIndexChanged(object sender, EventArgs e)
{
    DropDownList ddl   = (DropDownList)  sender;
    RepeaterItem item  = (RepeaterItem)  ddl .NamingContainer;
    TextBox txt        = (TextBox) item.FindControl("TextBox4");
    txt.Text           = ddl.SelectedItem.Text;
}