Question

尝试通过SqlDataAdapter.Update(DataTable)更新数据表时，我收到ArgumentOutOfRangeException“StatementType枚举值4无效”。根据{{3}}，可能的枚举值是Select，Insert，Update，Delete和Batch，我猜测Batch是值4。

我不确定如何设置此值，因为它属于我在SqlRowUpdatedEventHandler中获取的SqlRowUpdatedEventArgs对象，或者它为何无效。

基本上我正在从Web服务调用返回的XmlNode构建DataTable，对数据视图进行排序，然后以200的批量发布更新。

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);
    }
}

这是事件处理程序：

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

Answer 1

卫生署！我没有在SqlCommand对象中设置连接！不确定奇怪错误背后的原因，但更改构造函数重载清除了一切：

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

Answer 2

可能会认为您添加行而不是更新。尝试将SetModified移动到循环中：

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();
}

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

2 个答案: