IndexOutOfRangeException：填充数据集时无法找到表0

Question

当我想运行此代码时，我收到一个错误，引发＆＃34; IndexOutOfRangeException＆＃34; on for循环条件。我试图使用断点，并在我的DataSet填充后单击放大镜。 Visualizer说它是一个空的DataSet。如果有人可以帮助我，我将不胜感激！

我的PageLoad功能包括if(!IsPostBack)，如下所示：(freeQuery.aspx.cs)

if (!IsPostBack
{
    ViewState["sortColumn"] = " ";
    ViewState["sortDirection"] = " ";

    string pageURL = HttpContext.Current.Request.RawUrl;
    DataSet tables = new DataSet();
    string queryString2 = "show tables;";
    tables = connectHive(queryString2, pageURL);
    List<string> list = new List<string>();
    for (int i = 0; i < tables.Tables[0].Rows.Count; i++)
    {
        list.Add(tables.Tables[0].Rows[i][0].ToString());
    }
    ListBox1.DataSource = list;
    ListBox1.DataBind();
    ListBox1.Rows = (ListBox1.Items.Count / 2) + 3;
}

和connectHive功能位于BasePage.cs下方：

protected DataSet connectHive(string query, string pageURL)
{ // Hadoop Hive Connection
    var page = HttpContext.Current.CurrentHandler as Page;
    OdbcConnection DbConnection = new OdbcConnection("DSN=Hive2");
    DbConnection.ConnectionTimeout = 20000000;
    try
    {
        DbConnection.Open();
    }
    catch (OdbcException exep)
    {
        ScriptManager.RegisterStartupScript(page, page.GetType(), "alert", "alert('Error in Query!');window.location ='" + pageURL.Replace("/", "") + "';", true);
    }

    OdbcCommand cmd = DbConnection.CreateCommand();
    OdbcDataAdapter adapter = new OdbcDataAdapter(query, DbConnection);
    adapter.SelectCommand.CommandTimeout = 20000000;
    DataSet data = new DataSet();
    data.EnforceConstraints = false;
    try
    {
        adapter.Fill(data);
    }
    catch (Exception ex)
    {
        List<string> parameters = new List<string>();
        string pageName = findNameByUrl(HttpContext.Current.Request.RawUrl);
        parameters.Add("UserID:");
        parameters.Add(Session["sicil"].ToString());
        parameters.Add("Exception:");
        parameters.Add(ex.ToString());
        string parameterString = castParameters(parameters);
        string exception = "";
        string[] sep = new string[] { "\r\n" };
        string[] lines = ex.ToString().Split(sep, StringSplitOptions.RemoveEmptyEntries);
        int position = lines[0].ToString().LastIndexOf("FAILED:");
        if (position > -1)
        exception = lines[0].ToString().Substring(position, lines[0].Length - position);
        Session["Exception"] = exception.Replace("'", "");
        Log(query, "Select Table(BasePage)", pageName, "Failed", parameterString);
    }

    DbConnection.Close();
    return data;
}