跨页面传值

Default3.aspx //接收页面

程序代码

protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.PreviousPage != null)//记得加个这个判断语句
        {
           TextBox1.Text= (((TextBox)PreviousPage.FindControl("TextBox1")).Text);
        }
        
    }

Default4.aspx //传值页面

程序代码

protected void Page_Load(object sender, EventArgs e)
    {
        Button1.PostBackUrl = "Default3.aspx";
    }