C# 验证码 背景图案 非（ASP.NET)

[daima222]

本人编写的验证码：
private String ValidationCode() {
string chars = "0,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,m,n,o,p,q,r,s,t,u,v,w,x,y,z";
string[] charsArray = chars.Split(',');
string RandomChar = "";
Random random = new Random();
for (int i = 0; i < 4; i++)
{
int temp = random.Next(0, charsArray.Length - 1);
RandomChar += charsArray[temp];
}
return (RandomChar.ToString());
}
private void lblValidationCodeShow_Click(object sender, EventArgs e) {
VldC = this.ValidationCode();
lblValidationCodeShow.Text = VldC;
}
但是，这样实现的效果是没有验证码下面是没有背景图案的。请问，如果想实现带背景图案的功能应该如何修改？（非Web)

[wuhj]

String str=ValidationCode();
            Bitmap b = new Bitmap(80, 120);
            Graphics g = Graphics.FromImage(b);
            g.DrawString(str, new Font("Verdana", 20), new SolidBrush(Color.Tomato), 10, 10);
            g.Dispose();
            picBox1.Image = b;

[daima222]

但是，这样实现的效果是验证码下面没有背景图案的。请问，如果想实现带背景图案的功能应该如何修改？（非Web)

[lovelan1748]

graphics把背景图画上再画验证码

[open666111]

要的话偶可以提供源码给你哦

[daima222]

我尝试了类似于label.Image=Photo的语句，运行时报错“参数不正确”

[daima222]

顶上。继续等待更多的高手来解决。

[江南小鱼]

/// <summary>

    /// 生成验证码图片

    /// </summary>

    /// <param name="checkCode"></param>

    private void CreateCheckCodeImage(string checkCode)

    {

        if (checkCode == null || checkCode.Trim() == String.Empty)

            return;


        System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22);

        Graphics g = Graphics.FromImage(image);


        try

        {

            //生成随机生成器

            Random random = new Random();


            //清空图片背景色

            g.Clear(Color.White);


            //画图片的背景噪音线

            for (int i = 0; i < 25; i++)

            {

                int x1 = random.Next(image.Width);

                int x2 = random.Next(image.Width);

                int y1 = random.Next(image.Height);

                int y2 = random.Next(image.Height);


                g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);

            }


            Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));

            System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);

            g.DrawString(checkCode, font, brush, 2, 2);


            //画图片的前景噪音点

            for (int i = 0; i < 100; i++)

            {

                int x = random.Next(image.Width);

                int y = random.Next(image.Height);


                image.SetPixel(x, y, Color.FromArgb(random.Next()));

            }


            //画图片的边框线

            g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);


            System.IO.MemoryStream ms = new System.IO.MemoryStream();

            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);

            Response.ClearContent();

            Response.ContentType = "image/Gif";

            Response.BinaryWrite(ms.ToArray());

        }

        finally

        {

            g.Dispose();

            image.Dispose();

        }

    }

}

[江南小鱼]

/// <summary>

    /// 产生随机数

    /// </summary>

    /// <returns></returns>

    private string GenerateCheckCode()

    {

        int number;

        char code;

        string checkCode = String.Empty;


        System.Random random = new Random();


        for (int i = 0; i < 5; i++)

        {

            number = random.Next();


            if (number % 2 == 0)

                code = (char)('0' + (char)(number % 10));

            else

                code = (char)('A' + (char)(number % 26));


            checkCode += code.ToString();

        }

        Session["CheckCode"] = checkCode;

        return checkCode;

    }

[cjnkd]

ding

[kensouterry]

Mark,

[daima222]

7楼的方法是Web下的，我之前尝试过了，也做了相应的修改，但是还是编译不了。

[luzehan]

[Quote=引用 11 楼 daima222 的回复:]
7楼的方法是Web下的，我之前尝试过了，也做了相应的修改，但是还是编译不了。
[/Quote]

老大 服你..

using System;

public sealed class RandomCodeCreater
{

    /// <summary>
    /// 生成验证码图片
     /// </summary>
    /// <returns>生成的图片</returns>
    public static System.Drawing.Image CreateCheckCodeImage()
    {
       return CreateCheckCodeImage(GenerateCheckCode());
    }

    /// <summary>
    /// 生成验证码图片
     /// </summary>
    /// <param name="checkCode">要显示在验证码图片上的文字</param>
    /// <returns>生成的图片</returns>
    public static System.Drawing.Image CreateCheckCodeImage(string checkCode)
    {

        if (checkCode == null || checkCode.Trim() == String.Empty)
            return null;


        System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22);

        System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);


            //生成随机生成器
            Random random = new Random();


            //清空图片背景色
            g.Clear(System.Drawing.Color.White);


            //画图片的背景噪音线
            for (int i = 0; i < 25; i++)

            {

                int x1 = random.Next(image.Width);

                int x2 = random.Next(image.Width);

                int y1 = random.Next(image.Height);

                int y2 = random.Next(image.Height);


                g.DrawLine(new System.Drawing.Pen(System.Drawing.Color.Silver), x1, y1, x2, y2);

            }


            System.Drawing.Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));

            System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new System.Drawing.Rectangle(0, 0, image.Width, image.Height), System.Drawing.Color.Blue, System.Drawing.Color.DarkRed, 1.2f, true);

            g.DrawString(checkCode, font, brush, 2, 2);


            //画图片的前景噪音点

            for (int i = 0; i < 100; i++)

            {

                int x = random.Next(image.Width);

                int y = random.Next(image.Height);


                image.SetPixel(x, y, System.Drawing.Color.FromArgb(random.Next()));

            }


            //画图片的边框线

            g.DrawRectangle(new System.Drawing.Pen(System.Drawing.Color.Silver), 0, 0, image.Width - 1, image.Height - 1);


            System.IO.MemoryStream ms = new System.IO.MemoryStream();

            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);

           /*
            Response.ClearContent();

            Response.ContentType = "image/Gif";

            Response.BinaryWrite(ms.ToArray());
           */
           return image;


    }




    /// <summary>
    /// 产生随机字符串
    /// </summary>
    /// <returns>生成的字符串</returns>
    public static string GenerateCheckCode()
    {

        int number;

        char code;

        string checkCode = String.Empty;


        System.Random random = new Random();


        for (int i = 0; i < 5; i++)

        {

            number = random.Next();


            if (number % 2 == 0)

                code = (char)('0' + (char)(number % 10));

            else

                code = (char)('A' + (char)(number % 26));


            checkCode += code.ToString();

        }

        //Session["CheckCode"] = checkCode;

        return checkCode;

    }

}



//调用方例子:

public class TestWindow:System.Windows.Forms.Form
{

  System.Windows.Forms.PictureBox pictureBox=null;

  public TestWindow()
  {

    pictureBox=new System.Windows.Forms.PictureBox();
    Controls.Add(pictureBox);

    OnInitialize();

  }

  private void OnInitialize()
  {
    System.Drawing.Image image = RandomCodeCreater.CreateCheckCodeImage();
    
    pictureBox.Image=image;
  }

 
}

[江南小鱼]

[Quote=引用 11 楼 daima222 的回复:]
7楼的方法是Web下的，我之前尝试过了，也做了相应的修改，但是还是编译不了。
[/Quote]
web下的代码给你，自己改下不就行了？^_^
LS的给你改好了..