.netC#
验证码生成，登录分开测试都对，为什么和一起就出错，即使验证码输对了，还是提示错误，请高手明示，新手学习中。这两个是代码图
这个是运行图
这个是错误显示
[解决办法]
你调试一下，看看text3和yanzm是否一个值
[解决办法]
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.IO;
using System.Drawing.Imaging;
namespace CheckCode
{
[DefaultProperty("Text")]
[ToolboxData("<{0}:ServerCode runat=server></{0}:ServerCode>")]
public class ServerCode : WebControl
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
public string Text
{
get
{
String s = (String)ViewState["Text"];
return ((s == null) ? "[" + this.ID + "]" : s);
}
set
{
ViewState["Text"] = value;
}
}
protected override void RenderContents(HtmlTextWriter output)
{
output.Write(Text);
}
public void CreateCode()
{
string chkCode = string.Empty;
Color[] color = { Color.Black,Color.Red,
Color.Blue,Color.Green,
Color.Orange,Color.Brown,Color.DarkBlue};
string[] font = { "Times New Roman","MS Mincho","Book Antiqua",
"Gungsuh","PMingLiU","Implact"};
char[] character = {'2','3','4','5','6','7','8','9',
'A','B','C','D','E','F','G','H','J','K','L','M',
'N','P','Q','R','S','T','W','X','Y'};
Random ran = new Random();
for (int i = 0; i < 4; i++)
{
chkCode += character[ran.Next(character.Length)];
}
HttpResponse response = this.Page.Response;
HttpCookie anyCookie = new HttpCookie("validateCookie");
anyCookie.Values.Add("ChkCode", chkCode);
response.Cookies["validateCookie"].Values["ChkCode"] = chkCode;
Bitmap bmp = new Bitmap(100,30);
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.White);
for (int i = 0; i < 5; i++)
{
int x1 = ran.Next(100);
int x2 = ran.Next(30);
int y1 = ran.Next(100);
int y2 = ran.Next(30);
Color clr = color[ran.Next(color.Length)];
g.DrawLine(new Pen(clr),x1,y1,x2,y2);
}
for (int i = 0; i < 100; i++)
{
int x = ran.Next(bmp.Width);
int y = ran.Next(bmp.Height);
Color clr = color[ran.Next(color.Length)];
bmp.SetPixel(x,y,clr);
}
for (int i = 0; i < chkCode.Length; i++)
{
string fnt = font[ran.Next(font.Length)];
Font ft = new Font(fnt,16);
Color clr = color[ran.Next(color.Length)];
g.DrawString(chkCode[i].ToString(),ft,new SolidBrush(clr),
(float)i*20+20,(float)6);
}
MemoryStream ms = new MemoryStream();
try
{
bmp.Save(ms, ImageFormat.Png);
response.ClearContent();
response.ContentType = "image/Png";
response.BinaryWrite(ms.ToArray());
response.Flush();
response.End();
}
catch (Exception)
{
throw;
}
finally
{
bmp.Dispose();
g.Dispose();
}
}
public bool CheckSN(string sn)
{
return (sn.ToUpper()==
this.Page.Request.Cookies["validateCookie"].Values["ChkCode"]
.ToString().ToUpper());
}
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
string str = this.Page.Request.QueryString["_ImageTag"];
if (str == "1")
{
this.CreateCode();
}
}
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
if (!this.DesignMode)
{
writer.Write("<img border="1" src="{0}" Style='width:100px height:30px'>",
this.Page.Request.Path + "?_ImageTag=1");
}
else
{
writer.Write("验证码控件");
}
}
}
}
