.NET 调用RFC函数,怎么传表参数

我调用RFC函数的代码如下

private void TestTable_Click(object sender, EventArgs e)

{

    SAPLogonCtrl.SAPLogonControlClass connctl = new SAPLogonCtrl.SAPLogonControlClass();

    //下面的参数值根据实际情况赋值

  connctl.Client = "300";

    connctl.Language = "ZH";

    connctl.ApplicationServer = "10.1.1.30";//Application server IP

    connctl.SystemNumber = 00;

    connctl.User = "mes";

    connctl.Password = "intmes";

    SAPLogonCtrl.Connection conn = (SAPLogonCtrl.Connection)connctl.NewConnection();

    //登陆

  if (conn.Logon(null, true))

        MessageBox.Show("Successful");

    SAPFunctionsOCX.SAPFunctionsClass functions = new SAPFunctionsOCX.SAPFunctionsClass();

    functions.Connection = conn;

    //这里就可以传入Function Name

    SAPFunctionsOCX.Function fucntion = (SAPFunctionsOCX.Function)functions.Add("RFC_READ_TABLE");

    //这里是传入值参数

  SAPFunctionsOCX.Parameter parameter1 = (SAPFunctionsOCX.Parameter)fucntion.get_Exports("QUERY_TABLE");

    parameter1.Value = "ZMESBG";

    SAPFunctionsOCX.Parameter parameter2 = (SAPFunctionsOCX.Parameter)fucntion.get_Exports("DELIMITER");

    parameter2.Value = ";";

    //这里是传入表的参数,这里有两个表OPTIONS和FIELDS

    SAPTableFactoryCtrl.Tables Tables1 = (SAPTableFactoryCtrl.Tables)fucntion.Tables;

    SAPTableFactoryCtrl.Table table0 = (SAPTableFactoryCtrl.Table)Tables1.get_Item("OPTIONS");           

    table0.AppendGridData(1, 1, 1, "LGORT = 'Z000'");

    SAPTableFactoryCtrl.Table table1 = (SAPTableFactoryCtrl.Table)Tables1.get_Item("FIELDS");

    table1.AppendGridData(1, 1, 1, "ZMESBGID");

    table1.AppendGridData(2, 1, 1, "WERKS");

    table1.AppendGridData(3, 1, 1, "BUDAT");

    table1.AppendGridData(4, 1, 1, "CONF_CNT");

    table1.AppendGridData(5, 1, 1, "ERZET");

////这行报错,错误提示 Bad index

    table1.AppendGridData(6, 1, 1, "ERDAT");

    table1.AppendGridData(7, 1, 1, "SERNR");

    table1.AppendGridData(8, 1, 1, "LGORT");

    //调用函数，并读取数据

    if (fucntion.Call())

    {

        Tables1 = (SAPTableFactoryCtrl.Tables)fucntion.Tables;

        SAPTableFactoryCtrl.Table talbe2 = (SAPTableFactoryCtrl.Table)Tables1.get_Item("DATA");

        MessageBox.Show(talbe2.get_Cell(1, 1).ToString());

    }

    //退出登陆

    conn.Logoff();

}

////这行报错,错误提示 Bad index

    table1.AppendGridData(6, 1, 1, "ERDAT");

    table1.AppendGridData(7, 1, 1, "SERNR");

    table1.AppendGridData(8, 1, 1, "LGORT");

如果把那3行注释,程序是能正常执行的,但是实际情况是需要更多的行数的

谁能给些指导意见?