Question

I have a drop down box that populates textbox values based on its value. It fires when it is changed but on pageload it doesnt fire. How do I get it to fire on page load?

   protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {     
   TextBox3.Text = DropDownList1.SelectedValue;
        TextBox12.Text = DropDownList1.SelectedValue;
        TextBox21.Text = DropDownList1.SelectedValue;

     //etc

Answer 1

Tim Schmelter’s comment is right on the money.

// Wire up to the page load event
protected void Page_Load(object sender, System.EventArgs e)
{
   updateTextBoxes();
}

// Wire up to the select index-changed event
protected void DropDownList1_SelectIndexChanged( object sender, EventArgs e )
{
    updateTextBoxes();
}


// your workhorse method
protected void updateTextBoxes()
{
   TextBox3.Text  = DropDownList1.SelectedValue;
   TextBox12.Text = DropDownList1.SelectedValue;
   TextBox21.Text = DropDownList1.SelectedValue;

   // etc.
}