Question

我有一个winform C＃SQL 2008 App ...

我有一个每日调用报表表单在执行时崩溃，这意味着它抛出“无法绑定到DataSource上的属性或列Sr_No”异常并指向program.cs表单 - ＆gt;

static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new Daily_Call_Report());
    }

我在每日通话报告的表单加载事件上有一个数据集。继承人看起来如何......

try
        {
        SqlConnection last1 = new SqlConnection(@"Data Source=2011-GOA-RCC3\SQLEXPRESS;Initial Catalog=IOB_Comm;Integrated Security=True");
        last1.Open();
        SqlCommand lasts = new SqlCommand();
        lasts.Connection = last1;
        lasts.CommandText = "Select Top 1 Sr_No from DCR Order By Sr_No Desc ";
        lasts.ExecuteNonQuery();
        SqlDataReader darw = lasts.ExecuteReader();
        darw.Read();
        label21.Text = darw[@"Sr_No"].ToString();

            int last = Convert.ToInt32(label21.Text);
            int next = last + 1;
            label21.Text = next.ToString();

        darw.Close();
        dataGridView2.DataSource = null;
        //to populate gridview
        SqlCommand datvi = new SqlCommand();
        datvi.Connection = last1;
        datvi.CommandText = "Select * from DCR";
        datvi.ExecuteNonQuery();
        SqlDataAdapter swe = new SqlDataAdapter(datvi);
        DataSet dv1 = new DataSet();

        swe.Fill(dv1);
        dataGridView2.DataSource = dv1.Tables[0];

        last1.Close();

            //code which allows custom date and time to choose...
        {

            dateTimePicker1.Format = DateTimePickerFormat.Custom;
            dateTimePicker1.CustomFormat = "dd - MM - yyyy HH:mm";

            dateTimePicker2.Format = DateTimePickerFormat.Custom;
            dateTimePicker2.CustomFormat = "dd - MM - yyyy HH:mm";

        }
        }

在任何表格控件上绝对没有数据绑定......

并且所有帮助将不胜感激...... 感谢

Answer 1

我认为问题在于，当您期望数据返回时，您正在使用ExecuteNonQuery。为什么不这样做呢。

var dataSets = new DataSet();
        using (var connx = new SqlConnection(LastUsedConnectionString))
        {
            try
            {
                SqlCommand command = new SqlCommand("Select * from DCR", connx);
                command.CommandType = CommandType.Text;
                SqlDataAdapter da = new SqlDataAdapter(command);
                da.Fill(dataSets);
            }
            finally
            {
                connx.Close();
            }
        }

无法绑定到DataSource上的属性或列

1 个答案: