view.aspx.cs

学习积累的代码段

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;

public partial class view : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        switch (DropDownList1.SelectedValue)
        {
            case "1":
                Image1.ImageUrl = "png.aspx?aa=1";
                break;
            case "2":
                Image1.ImageUrl = "png.aspx?aa=2";
                break;
            case "3":
                Image1.ImageUrl = "png.aspx?aa=3";
                break;
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        if (TextBox1.Text == Session["gif"].ToString())
            Response.Write("OK,正确");
        else
            Response.Write("验证码不符合");
    }
}