c# – asp.net gridview不显示数据

protected void Button1_Click1(object sender,EventArgs e)
{
    sqlConnectionStringBuilder connb = new sqlConnectionStringBuilder(ConfigurationManager.ConnectionStrings["SCS"].ConnectionString);      
    using (sqlConnection conn = new sqlConnection(connb.ConnectionString))
    {
        sqlCommand cmd = new sqlCommand("Select * from dbo.Users;",conn);
        DataTable tb = new DataTable();

        sqlDataAdapter da = new sqlDataAdapter(cmd);

        da.Fill(tb);
        tb.AcceptChanges();
        GridView1.DataSource = tb;
        GridView1.DataBind();
     }
}

这是我在C#asp.net应用程序中的代码.我想在gridview中显示sql表.

<Columns>
  <asp:BoundField ItemStyle-Width="150px" datafield="name" HeaderText="name" />
  <asp:BoundField ItemStyle-Width="150px" datafield="lastname" HeaderText="lastname" />
  <asp:BoundField ItemStyle-Width="150px" datafield="ID" HeaderText="ID" />
</Columns>

它显示空的gridview(当我按下button1时).它不显示任何错误消息.连接字符串工作,sql命令影响行,但它仍然没有显示gridview上的任何数据！

谁能帮我？

解决方法

DataSet ds = new DataSet();
sqlDataAdapter da = new sqlDataAdapter(cmd);

da.Fill(ds);

GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();