Update error in GridView

[_mickey]

I use objectdatasource with GridView.
But there is an error, when I tried to update some fields and some other fields are empty. Can anyone solve this problem?

The error like this:
Procedure 'xpUpdEventAutomateExtra' expects parameter '@vchExtra', which was not supplied.

Code
public void xpUpdEventAutomateExtra(long biEventAutomateExtraID, long biEventAutomateID, string vchFeed, string vchSport, string vchQueryString, string vchDuration, string vchExtra, bool bAddGame, bool bXMLOnly, bool bDeleted)
    {
        SqlConnection oConn = new SqlConnection(gCS);
        oConn.Open();
        SqlCommand oCmd = new SqlCommand("xpUpdEventAutomateExtra", oConn);
        oCmd.CommandType = CommandType.StoredProcedure;//oCmd.CommandTimeout = 999999999;

        oCmd.Parameters.Add(new SqlParameter("@biEventAutomateExtraID", SqlDbType.BigInt, 8));
        oCmd.Parameters["@biEventAutomateExtraID"].Value = biEventAutomateExtraID;
        oCmd.Parameters["@biEventAutomateExtraID"].Direction = ParameterDirection.Input;
        oCmd.Parameters.Add(new SqlParameter("@biEventAutomateID", SqlDbType.BigInt, 8));
        oCmd.Parameters["@biEventAutomateID"].Value = biEventAutomateID;
        oCmd.Parameters["@biEventAutomateID"].Direction = ParameterDirection.Input;
       
        
        oCmd.Parameters.Add(new SqlParameter("@vchQueryString", SqlDbType.VarChar, 256));
        oCmd.Parameters["@vchQueryString"].Value = vchQueryString;
        oCmd.Parameters["@vchQueryString"].Direction = ParameterDirection.Input;
        
        oCmd.Parameters.Add(new SqlParameter("@vchDuration", SqlDbType.VarChar, 256));
        oCmd.Parameters["@vchDuration"].Value = vchDuration;
        oCmd.Parameters["@vchDuration"].Direction = ParameterDirection.Input;
        
        oCmd.Parameters.Add(new SqlParameter("@vchExtra", SqlDbType.VarChar, 256));
        oCmd.Parameters["@vchExtra"].Value = vchExtra;       
        oCmd.Parameters["@vchExtra"].Direction = ParameterDirection.Input;

       
        oCmd.Parameters.Add(new SqlParameter("@bXMLOnly", SqlDbType.Bit, 1));
        oCmd.Parameters["@bXMLOnly"].Value = bXMLOnly;
        oCmd.Parameters["@bXMLOnly"].Direction = ParameterDirection.Input;
        oCmd.Parameters.Add(new SqlParameter("@bDeleted", SqlDbType.Bit, 1));
        oCmd.Parameters["@bDeleted"].Value = bDeleted;
        oCmd.Parameters["@bDeleted"].Direction = ParameterDirection.Input;
        oCmd.ExecuteNonQuery();
        oCmd.Dispose();
        oConn.Close(); oConn.Dispose();
    }

ASPX page
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="xpGetEventAutomateExtra"
            TypeName="cEvenAutomateExtraD" UpdateMethod="xpUpdEventAutomateExtra" InsertMethod="xpAddEventAutomateExtra">
            <UpdateParameters>                
                <asp:Parameter Name="biEventAutomateExtraID" Type="Int64" />
                <asp:Parameter Name="biEventAutomateID" Type="Int64" />
                <asp:Parameter Name="vchFeed" Type="String" />
                <asp:Parameter Name="vchSport" Type="String" />
                <asp:Parameter Name="vchQueryString" Type="String" />
                <asp:Parameter Name="vchDuration" Type="String" />
                <asp:Parameter Name="vchExtra" Type="String" />
                <asp:Parameter Name="bAddGame" Type="Boolean" />
                <asp:Parameter Name="bXMLOnly" Type="Boolean" />
                <asp:Parameter Name="bDeleted" Type="Boolean" />
            </UpdateParameters>
            <InsertParameters>
                <asp:Parameter Name="biEventAutomateID" Type="Int64" />
                <asp:Parameter Name="vchFeed" Type="String" />
                <asp:Parameter Name="vchSport" Type="String" />
                <asp:Parameter Name="vchQueryString" Type="String" />
                <asp:Parameter Name="vchDuration" Type="String" />
                <asp:Parameter Name="vchExtra" Type="String" />
                <asp:Parameter Name="bAddGame" Type="Boolean" />
                <asp:Parameter Name="bXMLOnly" Type="Boolean" />
                <asp:Parameter Name="bDeleted" Type="Boolean" />
            </InsertParameters>
        </asp:ObjectDataSource>
    
    
        <asp:GridView ID="GridView1" runat="server" DataKeyNames="biEventAutomateExtraID" DataSourceID="ObjectDataSource1" AllowPaging="True" CellPadding="4" AutoGenerateEditButton="True" BackColor="White" BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px">
            <FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
            <RowStyle BackColor="White" ForeColor="#330099" />
            <PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
            <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
           
        </asp:GridView>
    </div>

thanks!

_mickey

[chazzy]

all I can think of, since it's a saturday morning, is maybe something like this:

oCmd.Parameters["@vchExtra"].Value = (vchExtra == null) ? "" : vchExtra;

[_mickey]

thanks Chazzy.
That all work well.

_mickey