Object reference not set to an instance of an object

[abds]

Please help,

I am getting this error in a DropDownList.SelectedIndexChanged handler.

The only line in the handler is
TextBox1.Text = DropDownList1.SelectedValue

What is this error and what do I do about it.

Thank you,

Phil

We are drowning in data, but we are starving for information.

 

[AtomicChip]

Make sure that both objects exist -

In your .aspx page, make sure that objects named TextBox1 and DropDownList1 exist.

Next is to make sure that these objects are referenced in your code-behind page. The objects should be declared at the top of your class as:

protected System.Web.UI.WebControls.TextBox TextBox1
protected System.Web.UI.WebControls.DropDownList DropDownList1

The error means that you are trying to reference an object that does not exist.

Hope that helps =D

-----------------------------------------------
"The night sky over the planet Krikkit is the least interesting sight in the entire universe."
-Hitch Hiker's Guide To The Galaxy

 

[jmeckley]

I don't think SelectedValue() is a valid properity of ListItems.

Try [name of drop down list].SelectedItem.Value

Jason Meckley
Database Analyst
WITF