首先修改web.config文件
添加如下字段….

接下来在text.aspx.cs文件中调用吧！
命名空间不能少了！

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class test : System.Web.UI.Page
{
int data;
protected void Page_Load(object sender, EventArgs e)
{
string connectionString = System.Configuration.ConfigurationManager.AppSettings[”CONNSQL”];
SqlConnection myConnection = new SqlConnection(connectionString);

SqlDataAdapter selectvalue = new SqlDataAdapter(“select * from sql”, myConnection);
DataSet ds = new DataSet();
data = selectvalue.Fill(ds);

}
protected void Button1_Click(object sender, EventArgs e)
{
TextBox1.Text = Convert.ToString(data);
}
}
将获取的值写入到全局变量 data中……