Ddlsalesperson has a selectedvalue which is invalid because it does not exist in the list of items. Parameter name: value

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ddlSalesPerson has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

What I have tried:

ddlSalesPerson has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

Posted 26-Aug-19 21:30pm

Member 10413842

Updated 27-Aug-19 1:10am

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OriginalGriff 27-Aug-19 3:47am

This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with. Perhaps if you show us the relevant code fragment, and tell us which line the error is found on that might help?

Use the "Improve question" widget to edit your question and provide better information.

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dnxit · Answer 1 · 2019-08-27T01:10:00

You really need to improve your question, anything I can think of the cause of this issue would be

Drop Down List has no items
Drop Down List is bound but this particular value is missing
Possibly value returned could be null

If Drop Down control's Text property is assigned a value before datasource, this error may also occur.

Example:

DropDownList1.Text = "Value1";
DropDownList1.DataSource = yourDatasource;

So I would suggest to clarify your question and provide more details for a better and to the point answer.