c# - 将数据源动态绑定(bind)到 gridview

Question

我收到此 C# 代码的错误

if (radioAll.Checked)
{
       SqlDataSource DataSource2 = new SqlDataSource();
       DataSource2.ID = "SqlDataSource2";
       this.Page.Controls.Add(DataSource2);
       DataSource2.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["SEP_Project_NewConnectionString2"].ConnectionString;
       DataSource2.SelectCommand = "SELECT courseNo,title from Course";
       gridview_modules.DataSource = DataSource2;
       gridview_modules.DataBind();
}

报错如下

连接字符串没问题。如何修复此错误？

Answer 1

你必须从你的SqlDataSource中选择一些东西

gridview_modules.DataSource = DataSource2.Select(DataSourceSelectArguments.Empty);
gridview_modules.DataBind();