Saturday, March 24, 2012

Strange error binding DataTable to DropDownList: out of range... Parameter name: value

I'm getting a nonsensical error when binding a DataTable with one row
to a DropDownList.

The DataTable's row contains the fields "id" (INT), "description"
(VARCHAR) and with a couple other unused fields.

I'm binding the table in code behind:

DataTable table=Publishinggroup.GetPublisheegroups(person.Id );
ddlPublishSource.DataSource=table;
ddlPublishSource.DataBind();

And in the aspx page, it's:

<asp:DropDownList ID="ddlPublishSource" runat="server"
DataValueField="id" DataTextField="description" /
But the error that occurs on the DataBind() command is nonsensical,
because there are no column names and no values with a value of
"value":

Specified argument was out of the range of valid values. Parameter
name: value

Any ideas on what might cause that?

Thanks,

-MikeHi-

Ok, I found the problem--the drop down list was having a value
preselected, before the datasource was assigned, but that value was no
longer in the datatable. That was why the bind was failing.

-Mike

On Wed, 07 Jul 2004 16:21:47 GMT, Mike Bridge <mike@.bridgecanada.com>
wrote:

>I'm getting a nonsensical error when binding a DataTable with one row
>to a DropDownList.

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