像我这样该如何验证验证码

[wrf617106268]

代码如下：
public partial class Frm_Login : Form
{
//随机码的长度
private const int iVerifyCodeLength = 6;
//随机码
private String strVerifyCode = "";
Frm_Main frm_main = new Frm_Main();
public Frm_Login()
{
InitializeComponent();
UpdateVerifyCode();
}
#region 更新验证码
//更新验证码
private void UpdateVerifyCode()
{
strVerifyCode = CreateRandomCode(iVerifyCodeLength);
CreateImage(strVerifyCode);
}
#endregion
#region 生成一定长度的验证码
private string CreateRandomCode(int iLength)
{
int rand;
char code;
string randomCode = String.Empty;

//生成一定长度的验证码
System.Random random = new Random();
for (int i = 0; i < iLength; i++)
{
rand = random.Next();

if (rand % 3 == 0)
{
code = (char)('A' + (char)(rand % 26));
}
else
{
code = (char)('0' + (char)(rand % 10));
}

randomCode += code.ToString();
}
return randomCode;
}
#endregion
#region 创建随机码图片
private void CreateImage(string strVerifyCode)
{
try
{
int iRandAngle = 45; //随机转动角度
int iMapWidth = (int)(strVerifyCode.Length * 21);
Bitmap map = new Bitmap(iMapWidth, 28); //创建图片背景

Graphics graph = Graphics.FromImage(map);
graph.Clear(Color.AliceBlue);//清除画面，填充背景
graph.DrawRectangle(new Pen(Color.Black, 0), 0, 0, map.Width - 1, map.Height - 1);//画一个边框
graph.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;//模式


Random rand = new Random();

//背景噪点生成
Pen blackPen = new Pen(Color.LightGray, 0);
for (int i = 0; i < 50; i++)
{
int x = rand.Next(0, map.Width);
int y = rand.Next(0, map.Height);
graph.DrawRectangle(blackPen, x, y, 1, 1);
}


//验证码旋转，防止机器识别
char[] chars = strVerifyCode.ToCharArray();//拆散字符串成单字符数组

//文字距中
StringFormat format = new StringFormat(StringFormatFlags.NoClip);
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;

//定义颜色
Color[] c = { Color.Black, Color.Red, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };
//定义字体
string[] font = { "Verdana", "Microsoft Sans Serif", "Comic Sans MS", "Arial", "宋体" };

for (int i = 0; i < chars.Length; i++)
{
int cindex = rand.Next(7);
int findex = rand.Next(5);

Font f = new System.Drawing.Font(font[findex], 13, System.Drawing.FontStyle.Bold);//字体样式(参数2为字体大小)
Brush b = new System.Drawing.SolidBrush(c[cindex]);

Point dot = new Point(16, 16);

float angle = rand.Next(-iRandAngle, iRandAngle);//转动的度数

graph.TranslateTransform(dot.X, dot.Y);//移动光标到指定位置
graph.RotateTransform(angle);
graph.DrawString(chars[i].ToString(), f, b, 1, 1, format);

graph.RotateTransform(-angle);//转回去
graph.TranslateTransform(2, -dot.Y);//移动光标到指定位置
}
pbVerifyCode.Image = map;


}
catch (ArgumentException)
{
MessageBox.Show("创建图片错误。");
}
}
#endregion

[wind_and_cloud]

private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text.Trim() == strVerifyCode.ToLower())
{
MessageBox.Show(string.Format( "生成的验证码为:{0},生成的验证码为{1}",textBox1.Text.Trim(),strVerifyCode),"");
}
}

这样可以验证啊。

[wind_and_cloud]

textBox1.Text.Trim().ToLower()

验证前两边都ToLower()下

[Connie]

有点长，看的头晕！

[wind_and_cloud]

在登陆事件里进行户/密码验证前判断下验证码输入框的值与strVerifyCode 变量保存的值是否一致不是能验证验证码吗？

[wind_and_cloud]

strVerifyCode
楼主这个变量应该声明成私有类成员吧。

[wind_and_cloud]

strVerifyCode
楼主这个变量应该声明成私有类成员吧。

不好意思，这个看裂了。

[wrf617106268]

有谁实验过了吗

[wrf617106268]

问题我自己解决了，感谢各位了