【文件属性】：
文件名称：随机生成6位图片验证码
文件大小：11KB
文件格式：TXT
更新时间：2017-01-08 11:23:42
验证码
随机生成6位图片验证码.
///
/// PicHandler1 的摘要说明
///
public class PicHandler1 : IHttpHandler, IRequiresSessionState
{
private string mCheckNo = string.Empty;
protected ImgBuilder _ImgBuilder = new ImgBuilder();
protected VryImgGen _ImgBuilderNew = new VryImgGen();
private string _text = string.Empty;
private string _font = "宋体";
private int _fontSize = 8;
private int _padding = 2;
public void ProcessRequest(HttpContext context)
{
mCheckNo = DisCheckNo();
context.Session["CheckCode"] = mCheckNo;
this._ImgBuilder.FontSize = this._fontSize;
this._ImgBuilder.Padding = this._padding;
if (!string.IsNullOrEmpty(this._font))
{
this._ImgBuilder.Fonts = new string[] { this._font };
}
this._ImgBuilderNew.ChaosWight = 40;
this._ImgBuilderNew.FontSize = 25;
this._ImgBuilderNew.Padding = 3;
System.Drawing.Bitmap image =
this._ImgBuilderNew.CreateImage(mCheckNo);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
context.Response.ClearContent();
context.Response.ContentType = "image/Jpeg";
context.Response.BinaryWrite(ms.ToArray());
context.Session["CheckCode"] = mCheckNo.ToString(); //如果没有实现IRequiresSessionState，则这里会出错，也无法生成图片
context.Response.End();
}
//验证码生成
protected string DisCheckNo()
{
string hash = HashCode.GetNext();
string CheckNo = string.Empty;
Random rd = new Random(DateTime.Now.Millisecond);
for (int i = 0; i < 6; i++)
{
CheckNo += hash.Substring(rd.Next(1, hash.Length - 1), 1);
}
CheckNo = CheckNo.Replace("0", rd.Next(1, 9).ToString());
CheckNo = CheckNo.Replace("o", rd.Next(1, 9).ToString());
