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aspx\u7c7b\u7684\u9a8c\u8bc1\u7801\u5904\u7406\u7a0b\u5e8f\uff0c\u968f\u540e\u8fd8\u4f1a\u8bb0\u5f55\u4e00\u822c\u7a0b\u5e8f\u7684\u7684\u9a8c\u8bc1\u7801\u7c7b<\/p> \n

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 1<\/span> using<\/span> System;\n<\/span> 2<\/span> using<\/span> System.Collections.Generic;\n<\/span> 3<\/span> using<\/span> System.Web;\n<\/span> 4<\/span> using<\/span> System.Web.UI;\n<\/span> 5<\/span> using<\/span> System.Web.UI.WebControls;\n<\/span> 6<\/span> using<\/span> System.Drawing;\n<\/span> 7<\/span> using<\/span> Maticsoft.Common;\n<\/span> 8<\/span> namespace<\/span> Maticsoft.Web\n<\/span> 9<\/span> {\n<\/span>10<\/span>     public<\/span> partial<\/span> class<\/span> ValidateCode : System.Web.UI.Page\n<\/span>11<\/span>     {\n<\/span>12<\/span>         private<\/span> static<\/span> char<\/span>[] constant =    \/\/<\/span>\u58f0\u660e\u4e00\u4e2a\u9759\u6001\u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u9a8c\u8bc1\u7801\u4ece\u8fd9\u91cc\u9762\u968f\u673a\u7684\u53d6<\/span>\n13<\/span>       {   \n<\/span>14<\/span>         '<\/span>1<\/span>'<\/span>,'<\/span>2<\/span>'<\/span>,'<\/span>3<\/span>'<\/span>,'<\/span>4<\/span>'<\/span>,'<\/span>5<\/span>'<\/span>,'<\/span>6<\/span>'<\/span>,'<\/span>7<\/span>'<\/span>,'<\/span>8<\/span>'<\/span>,'<\/span>9<\/span>'<\/span>,\n<\/span>15<\/span>         '<\/span>a<\/span>'<\/span>,'<\/span>b<\/span>'<\/span>,'<\/span>c<\/span>'<\/span>,'<\/span>d<\/span>'<\/span>,'<\/span>e<\/span>'<\/span>,'<\/span>f<\/span>'<\/span>,'<\/span>g<\/span>'<\/span>,'<\/span>h<\/span>'<\/span>,'<\/span>i<\/span>'<\/span>,'<\/span>j<\/span>'<\/span>,'<\/span>k<\/span>'<\/span>,'<\/span>l<\/span>'<\/span>,'<\/span>m<\/span>'<\/span>,'<\/span>n<\/span>'<\/span>,'<\/span>p<\/span>'<\/span>,'<\/span>q<\/span>'<\/span>,'<\/span>r<\/span>'<\/span>,'<\/span>s<\/span>'<\/span>,'<\/span>t<\/span>'<\/span>,'<\/span>u<\/span>'<\/span>,'<\/span>v<\/span>'<\/span>,'<\/span>w<\/span>'<\/span>,'<\/span>x<\/span>'<\/span>,'<\/span>y<\/span>'<\/span>,'<\/span>z<\/span>'<\/span>,   \n<\/span>16<\/span>         '<\/span>A<\/span>'<\/span>,'<\/span>B<\/span>'<\/span>,'<\/span>C<\/span>'<\/span>,'<\/span>D<\/span>'<\/span>,'<\/span>E<\/span>'<\/span>,'<\/span>F<\/span>'<\/span>,'<\/span>G<\/span>'<\/span>,'<\/span>H<\/span>'<\/span>,'<\/span>I<\/span>'<\/span>,'<\/span>J<\/span>'<\/span>,'<\/span>K<\/span>'<\/span>,'<\/span>L<\/span>'<\/span>,'<\/span>M<\/span>'<\/span>,'<\/span>N<\/span>'<\/span>,'<\/span>O<\/span>'<\/span>,'<\/span>P<\/span>'<\/span>,'<\/span>Q<\/span>'<\/span>,'<\/span>R<\/span>'<\/span>,'<\/span>S<\/span>'<\/span>,'<\/span>T<\/span>'<\/span>,'<\/span>U<\/span>'<\/span>,'<\/span>V<\/span>'<\/span>,'<\/span>W<\/span>'<\/span>,'<\/span>X<\/span>'<\/span>,'<\/span>Y<\/span>'<\/span>,'<\/span>Z<\/span>'<\/span>   \n17<\/span>       };\n<\/span>18<\/span>         private<\/span> void<\/span> Page_Load(object<\/span> sender, System.EventArgs e)\n<\/span>19<\/span>         {\n<\/span>20<\/span>             string<\/span> checkCode = CreateNumber(4<\/span>);\n<\/span>21<\/span>           \/\/<\/span>  Session["validateCode"] = checkCode.ToLower()<\/span>\n22<\/span>             Common_Sesson.Add("<\/span>validateCode<\/span>"<\/span>, checkCode.ToLower());\n<\/span>23<\/span>             CreateCheckCodeImage(checkCode);\n<\/span>24<\/span>         }\n<\/span>25<\/span> \n26<\/span>         #region<\/span> \u753b\u51fa\u56fe\u7247\u5e76\u663e\u793a\u5230\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u7684\u753b\u5e03\u4e0a\n27<\/span>         private<\/span> void<\/span> CreateCheckCodeImage(string<\/span> code)\n<\/span>28<\/span>         {\n<\/span>29<\/span>             var<\/span> imageCode = new<\/span> System.Drawing.Bitmap((int<\/span>)Math.Ceiling((code.Length * 12.5<\/span>)), 23<\/span>); \/\/<\/span>\u5b9a\u4e49\u56fe\u7247\u7684\u5bbd\u5ea6\u548c\u9ad8\u5ea6<\/span>\n30<\/span>             var<\/span> g = Graphics.FromImage(imageCode);  \/\/<\/span>\u52a0\u8f7d\u56fe\u7247\u5230\u753b\u5e03\u4e0a<\/span>\n31<\/span> \n32<\/span>             HttpContext.Current.Session["<\/span>Code_Char<\/span>"<\/span>] = code; \/\/<\/span>\u5c06\u9a8c\u8bc1\u7801\u5199\u5165\u5230session\u4e2d\u5b9e\u73b0\u9a8c\u8bc1<\/span>\n33<\/span> \n34<\/span>             try<\/span>\n35<\/span>             {\n<\/span>36<\/span>                 var<\/span> random = new<\/span> Random();\n<\/span>37<\/span>                 g.Clear(Color.White); \/\/<\/span>\u6e05\u7a7a\u56fe\u7247\u80cc\u666f\u8272\n<\/span>38<\/span> \n39<\/span>                 \/\/<\/span>\u753b\u56fe\u7247\u7684\u80cc\u666f\u566a\u97f3\u7ebf<\/span>\n40<\/span>                 for<\/span> (int<\/span> i = 0<\/span>; i < 25<\/span>; i++)\n<\/span>41<\/span>                 {\n<\/span>42<\/span>                     var<\/span> x1 = random.Next(imageCode.Width);\n<\/span>43<\/span>                     var<\/span> x2 = random.Next(imageCode.Width);\n<\/span>44<\/span>                     var<\/span> y1 = random.Next(imageCode.Height);\n<\/span>45<\/span>                     var<\/span> y2 = random.Next(imageCode.Height);\n<\/span>46<\/span> \n47<\/span>                     g.DrawLine(new<\/span> Pen(Color.Silver), new<\/span> Point(x1, y1), new<\/span> Point(x2, y2));\n<\/span>48<\/span>                 }\n<\/span>49<\/span> \n50<\/span>                 var<\/span> font = new<\/span> System.Drawing.Font("<\/span>Arial<\/span>"<\/span>, 12F, System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic);\n<\/span>51<\/span>                 var<\/span> brush = new<\/span> System.Drawing.Drawing2D.LinearGradientBrush(\n<\/span>52<\/span>                     new<\/span> Rectangle(0<\/span>, 0<\/span>, imageCode.Width, imageCode.Height),\n<\/span>53<\/span>                     Color.Blue, Color.DarkRed, 1.2F<\/span>, true<\/span>);\n<\/span>54<\/span>                 g.DrawString(code, font, brush, 2<\/span>, 2<\/span>);\n<\/span>55<\/span> \n56<\/span>                 \/\/<\/span>\u753b\u56fe\u7247\u7684\u524d\u666f\u566a\u97f3\u70b9<\/span>\n57<\/span>                 for<\/span> (int<\/span> i = 0<\/span>; i < 100<\/span>; i++)\n<\/span>58<\/span>                 {\n<\/span>59<\/span>                     var<\/span> x = random.Next(imageCode.Width);\n<\/span>60<\/span>                     var<\/span> y = random.Next(imageCode.Height);\n<\/span>61<\/span>                     imageCode.SetPixel(x, y, Color.FromArgb(random.Next()));\n<\/span>62<\/span>                 }\n<\/span>63<\/span> \n64<\/span>                 \/\/<\/span>\u753b\u56fe\u7247\u7684\u8fb9\u6846\u7ebf<\/span>\n65<\/span>                 g.DrawRectangle(new<\/span> Pen(Color.Silver), 0<\/span>, 0<\/span>, imageCode.Width - 1<\/span>, imageCode.Height - 1<\/span>);\n<\/span>66<\/span>                 var<\/span> ms = new<\/span> System.IO.MemoryStream();\n<\/span>67<\/span>                 imageCode.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);\n<\/span>68<\/span> \n69<\/span>                 HttpContext.Current.Response.ClearContent();\n<\/span>70<\/span>                 HttpContext.Current.Response.ContentType = "<\/span>image\/jpg<\/span>"<\/span>;\n<\/span>71<\/span>                 HttpContext.Current.Response.BinaryWrite(ms.ToArray());\n<\/span>72<\/span>             }\n<\/span>73<\/span>             finally<\/span>\n74<\/span>             {\n<\/span>75<\/span>                 g.Dispose();\n<\/span>76<\/span>                 imageCode.Dispose();\n<\/span>77<\/span>             }\n<\/span>78<\/span>         }\n<\/span>79<\/span>         #endregion<\/span>\n80<\/span>         #region<\/span> \u751f\u62100\u2014\u201460\u7684\u968f\u673a\u6570\n81<\/span>         private<\/span> static<\/span> string<\/span> CreateNumber(int<\/span> n) \/\/<\/span>n\u8868\u793a\u4ea7\u751f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6<\/span>\n82<\/span>         {\n<\/span>83<\/span>             string<\/span> str = ""<\/span>;\n<\/span>84<\/span>             System.Text.StringBuilder newRandom = new<\/span> System.Text.StringBuilder(60<\/span>);\n<\/span>85<\/span>             Random rd = new<\/span> Random();\n<\/span>86<\/span>             while<\/span> (n-- > 0<\/span>)\n<\/span>87<\/span>             {\n<\/span>88<\/span>                 str = str + constant[rd.Next(60<\/span>)];\n<\/span>89<\/span>             }\n<\/span>90<\/span>             return<\/span> str;\n<\/span>91<\/span>         }\n<\/span>92<\/span>         #endregion<\/span>\n93<\/span> \n94<\/span> \n95<\/span>     }\n<\/span>96<\/span> }<\/pre> \n  <\/div> \n  View Code<\/span>\n <\/div> \n 
 <\/p> \n 
\u524d\u53f0\u7684\u89c6\u56fe\u4ee3\u7801<\/p> \n 
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1<\/span> <p>\u9a8c\u8bc1\u7801\uff1a <input type="<\/span>text<\/span>"<\/span> id="<\/span>yzm<\/span>"<\/span> style="<\/span> width:100px<\/span>"<\/span>\/>\n2<\/span>          <img title="<\/span>\u770b\u4e0d\u6e05\uff1f<\/span>"<\/span> style="<\/span> cursor:pointer ;vertical-align:middle<\/span>"<\/span> width="<\/span>70px<\/span>"<\/span>  src="<\/span>Valid","orderid":"0","title":"\u9879\u76ee\u4e2d\u9a8c\u8bc1\u7801\u7684\u4f7f\u7528(\u4e00)","smalltitle":"","mid":"0","fname":".NET","special_id":"0","bak_id":"0","info":"0","hits":"4601","pages":"2","comments":"0","posttime":"2017-10-16 18:19:49","list":"1508149189","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"http:\/\/images.cnblogs.com\/OutliningIndicators\/ContractedBlock.gif","ispic":"1","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"\u9879\u76ee<\/A> \u9a8c\u8bc1<\/A> \u4f7f\u7528<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"113.108.110.181","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"\u9879\u76ee\u4e2d\u9a8c\u8bc1\u7801\u7684\u4f7f\u7528","lastview":"1713572533","digg_num":"778","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}