SysManage/imgcode.aspx.cs
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using System;
using System.Drawing.Imaging;
using System.IO;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
public partial class SysManage_imgcode : System.Web.UI.Page
{
string t = string.Empty;
protected void Page_Load(object sender, EventArgs e)
{
t = Request.QueryString["t"];
if (!IsPostBack)
{
string tmp = RndNum(4);
//HttpCookie a = new HttpCookie("ImageV", tmp);
//Response.Cookies.Add(a);
this.ValidateCode(tmp);
}
}
private void ValidateCode(string VNum)
{
Bitmap Img = null;
Graphics g = null;
MemoryStream ms = null;
int gheight = VNum.Length * 12;
Img = new Bitmap(gheight, 19);
g = Graphics.FromImage(Img);
//背景颜色
g.Clear(Color.White);
//文字字体
Font f = new Font("Arial", 11);
//文字颜色
Color strclr;
strclr = GetColor(0);
SolidBrush s = new SolidBrush(strclr);
g.DrawString(VNum, f, s, 3, 3);
ms = new MemoryStream();
Img.Save(ms, ImageFormat.Jpeg);
Response.ClearContent();
Response.ContentType = "image/Jpeg";
Response.BinaryWrite(ms.ToArray());
g.Dispose();
Img.Dispose();
Response.End();
}
private Color GetColor(int itemIndex)
{
Color color;
switch (itemIndex)
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