【蛤蟆】頁面驗證碼程式(C#)
在.NET中新建一個Web專案，新增一個.ASPX頁面，取名VerifyCode.aspx, 轉到其程式碼編輯狀態，將下面的程式碼Copy&Paste過去就可以用了，有什麼意見或問題歡迎提出^@^
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Drawing.Imaging;
using System.Drawing.Text;
namespace VerifyCode
{
/**////
/// 頁面驗證碼程式
/// 使用：在頁面中加入HTML程式碼 ![【蛤蟆】頁面驗證碼程式(C#)]()
///
public class VerifyCode : System.Web.UI.Page
{
Private Members#region Private Members
static string[] FontItems = new string[] { "Arial",
"Helvetica",
"Geneva",
"sans-serif",
"Verdana"
};
static Brush[] BrushItems = new Brush[] { Brushes.OliveDrab,
Brushes.ForestGreen,
Brushes.DarkCyan,
Brushes.LightSlateGray,
Brushes.RoyalBlue,
Brushes.SlateBlue,
Brushes.DarkViolet,
Brushes.MediumVioletRed,
Brushes.IndianRed,
Brushes.Firebrick,
Brushes.Chocolate,
Brushes.Peru,
Brushes.Goldenrod
};
static string[] BrushName = new string[] { "OliveDrab",
"ForestGreen",
"DarkCyan",
"LightSlateGray",
"RoyalBlue",
"SlateBlue",
"DarkViolet",
"MediumVioletRed",
"IndianRed",
"Firebrick",
"Chocolate",
"Peru",
"Goldenrod"
};
private static Color BackColor = Color.White;
private static Pen BorderColor = Pens.DarkGray;
private static int Width = 52;
private static int Height = 21;
private Random _random;
private string _code;
private int _brushNameIndex;
#endregion // end of Private Members
Web Form Designer generated code#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/**////
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
PageLoad Event#region PageLoad Event
public void Page_Load(object sender, System.EventArgs e)
{
//
// TODO : initialize
//
this._random = new Random();
this._code = GetRandomCode();
//
// TODO : use Session["code"] save the VerifyCode
//
Session["code"] = this._code;
//
// TODO : output Image
//
this.SetPageNoCache();
this.OnPaint();
}
#endregion // end of PageLoad Event
Helper Methods#region Helper Methods
/**////
/// 設定頁面不被快取
///
private void SetPageNoCache()
{
Response.Buffer = true;
Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
Response.Expires = 0;
Response.CacheControl = "no-cache";
Response.AppendHeader("Pragma","No-Cache");
}
/**////
/// 取得一個 4 位的隨機碼
///
///
private string GetRandomCode()
{
return Guid.NewGuid().ToString().Substring(0, 4);
}
/**////
/// 隨機取一個字型
///
///
private Font GetFont()
using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.Drawing.Imaging;using System.Drawing.Text;namespace VerifyCode{ /**//// /// 頁面驗證碼程式 /// 使用：在頁面中加入HTML程式碼 /// public class VerifyCode : System.Web.UI.Page { Private Members#region Private Members static string[] FontItems = new string[] { "Arial", "Helvetica", "Geneva", "sans-serif", "Verdana" }; static Brush[] BrushItems = new Brush[] { Brushes.OliveDrab, Brushes.ForestGreen, Brushes.DarkCyan, Brushes.LightSlateGray, Brushes.RoyalBlue, Brushes.SlateBlue, Brushes.DarkViolet, Brushes.MediumVioletRed, Brushes.IndianRed, Brushes.Firebrick, Brushes.Chocolate, Brushes.Peru, Brushes.Goldenrod }; static string[] BrushName = new string[] { "OliveDrab", "ForestGreen", "DarkCyan", "LightSlateGray", "RoyalBlue", "SlateBlue", "DarkViolet", "MediumVioletRed", "IndianRed", "Firebrick", "Chocolate", "Peru", "Goldenrod" }; private static Color BackColor = Color.White; private static Pen BorderColor = Pens.DarkGray; private static int Width = 52; private static int Height = 21; private Random _random; private string _code; private int _brushNameIndex; #endregion // end of Private Members Web Form Designer generated code#region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent(); base.OnInit(e); } /**//// /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// private void InitializeComponent() { this.Load += new System.EventHandler(this.Page_Load); } #endregion PageLoad Event#region PageLoad Event public void Page_Load(object sender, System.EventArgs e) { // // TODO : initialize // this._random = new Random(); this._code = GetRandomCode(); // // TODO : use Session["code"] save the VerifyCode // Session["code"] = this._code; // // TODO : output Image // this.SetPageNoCache(); this.OnPaint(); } #endregion // end of PageLoad Event Helper Methods#region Helper Methods /**//// /// 設定頁面不被快取 /// private void SetPageNoCache() { Response.Buffer = true; Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1); Response.Expires = 0; Response.CacheControl = "no-cache"; Response.AppendHeader("Pragma","No-Cache"); } /**//// /// 取得一個 4 位的隨機碼 /// /// private string GetRandomCode() { return Guid.NewGuid().ToString().Substring(0, 4); } /**//// /// 隨機取一個字型 /// /// private Font GetFont()
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/12639172/viewspace-349317/，如需轉載，請註明出處，否則將追究法律責任。
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