DropDownList “has a SelectedValue which is invalid because it does not exist in the list of items"

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hi,

I'm getting an error with this one that says:

DropDownList “has a SelectedValue which is invalid because it does not exist in the list of items”

I'm quite sure that my DataValueField is correct.

C#

locList.DataSource = ds;
locList.DataTextField = Property.NameColumn;
locList.DataValueField = Property.IdColumn;
locList.DataBind();

Posted 15-Apr-13 17:32pm

akosidab

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Aarti Meswania · Answer 1 · 2013-04-15T18:31:00

Solution 1

C#

locList.DataSource = ds.Tables[0];//assign table not dataset
    locList.DataTextField = Property.NameColumn;//make sure you have write column names properly
    locList.DataValueField = Property.IdColumn;
    locList.DataBind();

Happy Coding!
:)

Posted 15-Apr-13 18:31pm

Aarti Meswania

Comments

akosidab 16-Apr-13 0:45am

It's not working.

Aarti Meswania 16-Apr-13 0:45am

are you using web-application?

akosidab 16-Apr-13 3:58am

yes

babu saravanan · Answer 2 · 2013-04-15T18:37:00

Solution 2

use following

C#

if (!IsPostBack)
          {

        locList.DataSource = ds.Tables[0];
	locList.DataTextField = Property.NameColumn;
	locList.DataValueField = Property.IdColumn;
	locList.DataBind();

          }

Posted 15-Apr-13 18:37pm

babu saravanan

Comments

akosidab 16-Apr-13 0:45am

It's not working.