Error: No value given for one or more required parameters - ASP.NET C#

RD11
RD11 used Ask the Experts™
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Hi,

I have a Gridview on ASP.NET C# code, I also have a DropDown control so when users pick from the Dropdown control, the Gridview will display the results.

I sat the Gridview to get the ? parameter from the Dropdown control.  The error I am getting when I chose from the Dropdown: No value given for one or more required parameters.

Any idea why?

Thank you,
RD11
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Sr. Software Engineer
Commented:
Instead of setting Parameter= ? for GridView
Use Parameter= @Parameter

For details information of the Problem. Check following link

http://stackoverflow.com/questions/2783060/c-no-value-given-for-one-or-more-required-parameter-with-formview

Commented:
You should assign a default or empty value for your dropdown

Author

Commented:
When I used @ I got an error????

I went ahead and sat the default ? to a string instead of using the Dropdown control and it worked just fine.

In the Dropdown control, I manually inputted the desired strings, and its breaking there.  In fact, when the page loads, I get the result of the preset or default string, but when I choose from the dropdown control, I get the error.  
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Author

Commented:
Here is the Error Stack Trace
Server Error in '/' Application.
--------------------------------------------------------------------------------

No value given for one or more required parameters. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Data.OleDb.OleDbException: No value given for one or more required parameters.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 


[OleDbException (0x80040e10): No value given for one or more required parameters.]
   System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr) +1006560
   System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult) +255
   System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult) +188
   System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) +58
   System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) +161
   System.Data.OleDb.OleDbCommand.ExecuteReader(CommandBehavior behavior) +116
   System.Data.OleDb.OleDbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior) +4
   System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +130
   System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +287
   System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) +92
   System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +1297
   System.Web.UI.WebControls.AccessDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +58
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +19
   System.Web.UI.WebControls.DataBoundControl.PerformSelect() +142
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
   System.Web.UI.WebControls.GridView.DataBind() +4
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
   System.Web.UI.WebControls.BaseDataBoundControl.OnPreRender(EventArgs e) +22
   System.Web.UI.WebControls.GridView.OnPreRender(EventArgs e) +17
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

 


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Version Information: Microsoft .NET Framework Version:2.0.50727.4961; ASP.NET Version:2.0.50727.4927

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Manoj PatilSr. Software Engineer
Commented:
Can you post your code..... ???

Author

Commented:
I just found my issue.

In the wizard, I had a column name rather than ? under Define parameter.

Issue resolved.

Thank you for your support!

Author

Commented:
Thank you

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