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Invalid attempt to read when reader is closed

A colleague of mine is experiencing a very perplexing error.

He is using the following code to databind a datagrid:

Dim dbSearchReader As SqlDataReader =            dbConnection.ConnectionString = ConfigurationSettings.AppSettings("Connection")
dbConnection.Open()
dbCommand = New SqlCommand(Session("SQL"), dbConnection)
dbSearchReader = dbCommand.ExecuteReader
dgProducts.DataSource = dbSearchReader
dgProducts.DataBind()

When he runs his program on localhost and the development server the datagrid binds correctly.

When he runs his program on the live server he gets the following error:

System.InvalidOperationException: Invalid attempt to Read when reader is closed. at System.Data.SqlClient.SqlDataReader.Read() at System.Data.Common.DbEnumerator.MoveNext() at System.Web.UI.WebControls.DataGrid.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.BaseDataList.DataBind()

Any ideas are appreciated :-)

Thanks,
Dave.

0
tidydave
Asked:
tidydave
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1 Solution
 
DJ_Back-QCommented:
You cannot link to a DataReader, a DataReader is only used to display foward only information.


Use a DataSet Instead.
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ihenryCommented:
>> Dim dbSearchReader As SqlDataReader =    ...??
I don't think you pasted the correct code, can you paste it again?
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DotNetLover_BaanCommented:
Hi there,
when you bind  ( dgProducts.DataBind()),  ADO.Net closes the Reader. So, the reason you are getting error is, may be, due to something else you are doing after DataBinding. something else is trying to access the Reader.
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tidydaveAuthor Commented:
Not sure why it put an "=" after the first line of pasted code?  Shall post again.

Dim dbSearchReader As SqlDataReader
dbConnection.ConnectionString = ConfigurationSettings.AppSettings("Connection")
dbConnection.Open()
dbCommand = New SqlCommand(Session("SQL"), dbConnection)
dbSearchReader = dbCommand.ExecuteReader
dgProducts.DataSource = dbSearchReader
dgProducts.DataBind()

Cheers for the comments so far.
0
 
DotNetLover_BaanCommented:
What are you doing right after that ?
0
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