VB.Net - Displaying Data in Gridview

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I'm trying to display data in a Gridview without using the page load because I am also using a tabview of which each tab will display new data in a new grid.

When I run the following code, I'm getting an error "Object not set to a reference of an object".

When I step through the code, it is reading the data from the text boxes... just will not display the grid or the data.

The Stored procedure parameter have also been tested.

VB

Public Sub GetContractInfo()

        Dim connStr As String
        connStr = _
     ConfigurationManager.ConnectionStrings("HawkConnectionString").ConnectionString
        Dim cmd = New SqlCommand("bdis_ContractSearch")
        cmd.CommandType = CommandType.StoredProcedure
        cmd.Parameters.AddWithValue("@Contract", txtSCRCHcontractnum.Text)
        cmd.Parameters.AddWithValue("@ContractDesc", txtSRCHContractDescr.Text)
        cmd.Parameters.AddWithValue("@ProjMgrName", txtSRCHProjectMgr.Text)
        cmd.Parameters.AddWithValue("@Job", txtSRCHjobnum.Text)

        Try
            cmd.Connection.Open()
            grdContractSearch.DataSource = cmd.ExecuteReader()
            grdContractSearch.DataBind()

            cmd.Connection.Close()
            cmd.Connection.Dispose()
        Catch ex As Exception
            lblStatus.Text = ex.Message

        End Try


    End Sub

[Modified: added some tags for the question and fixed your code...you had to pre tags which were messing up the formatting.]

Posted 30-Jun-10 5:34am

technette

Updated 30-Jun-10 5:53am

William Winner

v2

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William Winner · Accepted Answer · 2010-06-30T05:58:00

you have to set the connection string for the sqlcommand:

VB

cmd.Connection = New SqlConnection(connStr)

This is another good reason to only put a single line within a Try/Catch block. When you have multiple lines of code, if you don't look at the StackTrace, you can't tell where the error came from sometimes.

So, I would put the cmd.Connection.Open in a Try/Cath and the cmd.ExecuteReader in a Try/Catch.

Close will only throw an error if Open does.

Dispose won't throw an error. Neither will GridView.DataBind.