Question

I have a GridView that pulls the data from an Oracle DataBase dynamically.

<asp:GridView ID="gvData" runat="server" DataSourceID="DS" CellPadding="4" 
        ForeColor="#333333" AllowSorting="True" AllowPaging="True" 
        ShowFooter="True" AutoGenerateDeleteButton="True" 
        AutoGenerateEditButton="True" AutoGenerateSelectButton="True"
        OnRowDataBound="gvData_RowDataBound"
        OnSelectedIndexChanged="gvData_SelectedIndexChanged" 
        OnRowUpdating="gvData_RowUpdating" OnRowUpdated="gvData_RowUpdated"
        OnRowDeleting="gvData_RowDeleting" OnRowDeleted="gvData_RowDeleted">
        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
        <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
        <PagerStyle BackColor="#284775" ForeColor="White" />
        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" 
            ForeColor="#333333" />
        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
        <EditRowStyle BackColor="#CCCCCC" />
        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
    </asp:GridView>

    <asp:SqlDataSource ID="DS" runat="server">
    </asp:SqlDataSource>

It works fine with SELECT/INSERT/DELETE statements, however when it comes to UPDATE statement , it returns an error ORA-01036: illegal variable name/number

protected void gvData_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    double number;
    List<string> text = new List<string>();
    List<string> pkParam = new List<string>();
    TextBox tb = new TextBox();
    LinkButton lb = new LinkButton();

    for (int i = 1; i < gvData.HeaderRow.Cells.Count; i++)
    {
        try 
        {
            lb = (LinkButton)gvData.HeaderRow.Cells[i].Controls[0];
            tb = (TextBox)gvData.Rows[e.RowIndex].Cells[i].Controls[0];

            if (tb.Text.Length > 0 && !Settings.PK.Contains(lb.Text))
                if(Double.TryParse(tb.Text.ToText(), out number))
                    text.Add(lb.Text + " = " + number);
                else
                    text.Add(lb.Text + " = " + "'" + tb.Text.ToText() + "'");
        }
        catch { }
    }

    foreach (string pk in Settings.PK)
    {
        pkParam.Add(pk + " = :" + pk);
        DS.UpdateParameters.Add(
            new Parameter(pk, TypeCode.String, e.Keys[pk].ToString()));
    }

    DS.UpdateCommand = string.Format("UPDATE {0} SET {1} WHERE {2}",
        Settings.TABLE, string.Join(",", text.ToArray()), 
            string.Join(" AND ", pkParam.ToArray()));
 }

The code of RowUpdate doesn’t really matter. I would write ANY update statement and it would return the same error.
Any ideas, folks? Thank you beforehands!

Sample query:

DS.UpdateCommand = "UPDATE ATDB.CTD_PROBLEM_EDIT_V SET CUTTING_COMMENTS = 'rrr'";

PK:

public static string[] PK = new string[] { "PROBLEM_DEPTH_MD", "API", "BUS_AREA_ID" };

Answer 1

I found my way around the problem. Not the best one but acceptable.
Instead of DS.UpdateCommand I use OracleCommand simply ignoring Exception about setting UpdateCommand.

protected void gvData_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
    if (e.Exception != null)
        e.ExceptionHandled = true;
}