无效的枚举值和SqlDataAdapter.Update（DataTable）

Question

I'm getting the ArgumentOutOfRangeException "The StatementType enumeration value, 4, is invalid" when trying to update a data table through SqlDataAdapter.Update(DataTable) . According to http://msdn.microsoft.com/en-us/library/system.data.statementtype(v=vs.100).aspx , the possible enum values are Select, Insert, Update, Delete, and Batch, and I'm guessing Batch is value 4.

I'm not really sure how this value is being set, as it belongs to the SqlRowUpdatedEventArgs object I'm getting in the SqlRowUpdatedEventHandler, or why it is invalid.

Basically I'm building a DataTable from an XmlNode being returned from a web service call, sorting the data view, and then issuing the update in batches of 200.

XmlNode result = null;
using (LeadService.ClientService service = new LeadService.ClientService())
{
    const string UserName = "SomeUserName";
    const string Password = "SomePassword";
    const int ChildReportId = 746;
    result = service.GetReportResults(UserName, Password, ChildReportId, null);
}

if (result.InnerXml != "")
{
    DataTable leads = new DataTable();
    leads.Columns.Add("ID1", typeof(int));
    leads.Columns.Add("ID2", typeof(string));
    leads.Columns.Add("CREATEDDATE", typeof(DateTime));

    foreach (XmlNode n in result.ChildNodes)
    {
        DataRow row = leads.NewRow();
        row["ID1"] = n["Id1"].InnerText;
        row["ID2"] = n["Id2"].InnerText;
        row["CREATEDDATE"] = n["DateAdded"].InnerText;
        leads.Rows.Add(row);
    }

    leads.DefaultView.Sort = "CREATEDDATE";
    DataTable newTable = leads.DefaultView.ToTable();
    newTable.AcceptChanges();
    foreach (DataRow r in newTable.Rows)
    {
        r.SetModified();
    }

    const string Update = "UPDATE SOMETHING SET ID1 = @ID1 WHERE ID2 = @ID2";

    using (SqlConnection con = new SqlConnection(Dal.GetConnectionString("CONNECTIONSTRING")))
    {
        SqlDataAdapter adap = new SqlDataAdapter();
        adap.UpdateCommand = new SqlCommand(Update);
        adap.UpdateCommand.Parameters.Add("@ID1", SqlDbType.NVarChar, 75, "ID1");
        adap.UpdateCommand.Parameters.Add("@ID2", SqlDbType.VarChar, 18, "ID2");
        adap.UpdateCommand.UpdatedRowSource = UpdateRowSource.None;
        adap.UpdateBatchSize = 200;
        adap.RowUpdated += new SqlRowUpdatedEventHandler(adap_RowUpdated);
        adap.Update(newTable);
    }
}

Here is the event handler:

private static void adap_RowUpdated(object sender, SqlRowUpdatedEventArgs e)
{
    _rowsProcessed += e.RowCount;
    _recordsAffected += e.RecordsAffected;
}

Answer 1

Doh! I hadn't set the connection in the SqlCommand object! Not sure about the reasoning behind the weird error, but changing the constructor overload cleared things up:

using (SqlConnection con = new SqlConnection(Dal.GetConnectionString("CONNECTIONSTRING")))
{
    SqlDataAdapter adap = new SqlDataAdapter();
    adap.UpdateCommand = new SqlCommand(Update, con);
    // ...
    adap.Update(newTable);
}

Answer 2

It may be thinking you're adding rows instead of updating . Try moving SetModified to your loop:

foreach (XmlNode n in result.ChildNodes)
{
    DataRow row = leads.NewRow();
    row["ID1"] = n["Id1"].InnerText;
    row["ID2"] = n["Id2"].InnerText;
    row["CREATEDDATE"] = n["DateAdded"].InnerText;
    leads.Rows.Add(row);
    row.SetModified();
}