常见的类整理
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Drawing;
using System.Text.RegularExpressions;//regex
using System.Text;//Encoding
using System.Security;//登录验证
using System.IO;
/**//// <summary>
/// Summary description for config
/// </summary>
public class config
{
构造函数#region 构造函数
public config()
{
//
// TODO: Add constructor logic here
//
}
#endregion
access建立连接#region access建立连接
public static OleDbConnection createCon()
{
OleDbConnection con = new OleDbConnection(System.Configuration.ConfigurationManager.ConnectionStrings["creTableConnectionString"].ConnectionString);
return con;
}
#endregion
sqlserver2000建立连接#region sqlserver2000建立连接
public static SqlConnection createSqlCon()
{
SqlConnection consql = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["creTableConnectionString"].ConnectionString);
return consql;
}
#endregion
过滤单引号#region 过滤单引号
/**//// <summary>
/// 过滤单引号 返回String
/// </summary>
/// <param name="Str"></param>
/// <returns></returns>
public static string Chk39(string Str)
{
if ((Str=="")||(Str==null))
Str = "";
else
Str = Str.Replace("'","'");
return Str;
}
#endregion
反过滤单引号#region 反过滤单引号
/**//// <summary>
/// 反过滤单引号 Return String
/// </summary>
/// <param name="Str"></param>
/// <returns></returns>
public static string ReChk39(string Str)
{
Str = Str.Replace("'","'");
return Str;
}
#endregion
判断用户是否登录#region 判断用户是否登录
public static void sessionIS()//判断用户是否登陆
{
//System.Web.HttpResponse response = new System.Web.HttpContext.
//System.Web.HttpResponse response = new System.Web.HttpContext.
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
string sid = Convert.ToString(System.Web.HttpContext.Current.Session["USERID"]);
string name = Convert.ToString(System.Web.HttpContext.Current.Session["USERNAME"]);
if (name == null || name == "" || sid == null || sid == "")
{
response.Write("<script>window.parent.location.href='login.aspx';</script>");
response.End();
}
}
#endregion
弹出JavaScript小窗口#region 弹出JavaScript小窗口
/**//// <summary>
/// 弹出JavaScript小窗口
/// </summary>
/// <param name="js">窗口信息</param>
public static void Alert(string message)
{
string js = @"<Script language='JavaScript'>
alert('" + message + "');</Script>";
HttpContext.Current.Response.Write(js);
}
#endregion
弹出消息框并且转向到新的#region 弹出消息框并且转向到新的
/**///// <summary>
/// 弹出消息框并且转向到新的URL
/// </summary>
/// <param name="message">消息内容</param>
/// <param name="toURL">连接地址</param>
public static void AlertAndRedirect(string message, string toURL)
{
string js = "<script language=javascript>alert('{0}');window.location.replace('{1}')</script>";
HttpContext.Current.Response.Write(string.Format(js, message, toURL));
}
#endregion
回到历史页面#region 回到历史页面
/**//**//**//// <summary>
/// 回到历史页面
/// </summary>
/// <param name="value">-1/1</param>
public static void GoHistory(int value)
{
string js = @"<Script language='JavaScript'>
history.go({0});
</Script>";
HttpContext.Current.Response.Write(string.Format(js, value));
}
#endregion
关闭当前窗口#region 关闭当前窗口
/**//**//**//// <summary>
/// 关闭当前窗口
/// </summary>
public static void CloseWindow()
{
string js = @"<Script language='JavaScript'>
parent.opener=null;window.close();
</Script>";
HttpContext.Current.Response.Write(js);
HttpContext.Current.Response.End();
}
#endregion
刷新父窗口#region 刷新父窗口
/**//**//**//// <summary>
/// 刷新父窗口
/// </summary>
public static void RefreshParent(string url)
{
string js = @"<Script language='JavaScript'>
window.opener.location.href='"+url+"';window.close();</Script>";
HttpContext.Current.Response.Write(js);
}
#endregion
刷新打开窗口#region 刷新打开窗口
/**//**//**//// <summary>
/// 刷新打开窗口
/// </summary>
public static void RefreshOpener()
{
string js = @"<Script language='JavaScript'>
windows.opener.location.reload();
</Script>";
HttpContext.Current.Response.Write(js);
}
#endregion
打开指定大小的新窗体#region 打开指定大小的新窗体
/**//**//**//// <summary>
/// 打开指定大小的新窗体
/// </summary>
/// <param name="url">地址</param>
/// <param name="width">宽</param>
/// <param name="heigth">高</param>
/// <param name="top">头位置</param>
/// <param name="left">左位置</param>
public static void OpenWebFormSize(string url, int width,int heigth,int top,int left)
{
string js = @"<Script language='JavaScript'>window.open('" + url + @"','','height=" + heigth + ",width=" + width + ",top="+top+",left="+left+",location=no,menubar=no,resizable=yes,scrollbars=yes,status=yes,titlebar=no,toolbar=no,directories=no');</Script>";
HttpContext.Current.Response.Write(js);
}
#endregion
转向Url制定的页面#region 转向Url制定的页面
/**//**//**//// <summary>
/// 转向Url制定的页面
/// </summary>
/// <param name="url">连接地址</param>
public static void JavaScriptLocationHref(string url)
{
string js = @"<Script language='JavaScript'>
window.location.replace('{0}');
</Script>";
js = string.Format(js, url);
HttpContext.Current.Response.Write(js);
}
#endregion
打开指定大小位置的模式对话框#region 打开指定大小位置的模式对话框
/**//**//**//// <summary>
/// 打开指定大小位置的模式对话框
/// </summary>
/// <param name="webFormUrl">连接地址</param>
/// <param name="width">宽</param>
/// <param name="height">高</param>
/// <param name="top">距离上位置</param>
/// <param name="left">距离左位置</param>
public static void ShowModalDialogWindow(string webFormUrl, int width, int height, int top, int left)
{
string features = "dialogWidth:" + width.ToString() + "px"
+ ";dialogHeight:" + height.ToString() + "px"
+ ";dialogLeft:" + left.ToString() + "px"
+ ";dialogTop:" + top.ToString() + "px"
+ ";center:yes;help=no;resizable:no;status:no;scroll=yes";
ShowModalDialogWindow(webFormUrl, features);
}
public static void ShowModalDialogWindow(string webFormUrl, string features)
{
string js = ShowModalDialogJavascript(webFormUrl, features);
HttpContext.Current.Response.Write(js);
}
public static string ShowModalDialogJavascript(string webFormUrl, string features)
{
string js = @"<script language=javascript>
showModalDialog('" + webFormUrl + "','','" + features + "');</script>";
return js;
}
#endregion
过滤输入的信息#region 过滤输入的信息
/**//// <summary>
/// 过滤输入的信息
/// </summary>
/// <param name="text">要过滤的字符串</param>
/// <param name="maxLength">最大长度</param>
/// <returns></returns>
public static string InputText(string text, int maxLength)
{
text = text.Trim();
if (string.IsNullOrEmpty(text))
return string.Empty;
if (text.Length > maxLength)
text = text.Substring(0, maxLength);
text = Regex.Replace(text, "[\\s]{2,}", " "); //two or more spaces
text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n"); //<br>
text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " "); //
text = Regex.Replace(text, "<(.|\\n)*?>", string.Empty); //any other tags
text = text.Replace("'", "''");
return text;
}
#endregion
截取字符串函数#region 截取字符串函数
/**//// <summary>
/// 截取字符串函数
/// </summary>
/// <param name="str">所要截取的字符串</param>
/// <param name="num">截取字符串的长度</param>
/// <returns></returns>
public static string GetSubString(string str, int num)
{
return (str.Length > num) ? str.Substring(0, num) + "" : str;
}
#endregion
特殊字符的转换#region 特殊字符的转换
public static string Encode(string str)
{
str = str.Replace("'", "＇");
str = str.Replace("\"", """);
str = str.Replace("<", "<");
str = str.Replace(">", ">");
return str;
}
public static string Decode(string str)
{
str = str.Replace(">", ">");
str = str.Replace("<", "<");
str = str.Replace(" ", " ");
str = str.Replace(""", "\"");
return str;
}
#endregion
字符传的转换 用在查询 登陆时 防止恶意的盗取密码#region 字符传的转换 用在查询 登陆时 防止恶意的盗取密码
public static string TBCode(string strtb)
{
strtb = strtb.Replace("!", "");
strtb = strtb.Replace("@", "");
strtb = strtb.Replace("#", "");
strtb = strtb.Replace("$", "");
strtb = strtb.Replace("%", "");
strtb = strtb.Replace("^", "");
strtb = strtb.Replace("&", "");
strtb = strtb.Replace("*", "");
strtb = strtb.Replace("(", "");
strtb = strtb.Replace(")", "");
strtb = strtb.Replace("_", "");
strtb = strtb.Replace("+", "");
strtb = strtb.Replace("|", "");
strtb = strtb.Replace("?", "");
strtb = strtb.Replace("/", "");
strtb = strtb.Replace(".", "");
strtb = strtb.Replace(">", "");
strtb = strtb.Replace("<", "");
strtb = strtb.Replace("{", "");
strtb = strtb.Replace("}", "");
strtb = strtb.Replace("[", "");
strtb = strtb.Replace("]", "");
strtb = strtb.Replace("-", "");
strtb = strtb.Replace("=", "");
strtb = strtb.Replace(",", "");
return strtb;
}
#endregion
获取汉字第一个拼音#region 获取汉字第一个拼音
/**//**/
/**//// <summary>
/// 获取汉字第一个拼音
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
static public string getSpells(string input)
{
int len = input.Length;
string reVal = "";
for (int i = 0; i < len; i++)
{
reVal += getSpell(input.Substring(i, 1));
}
return reVal;
}
static public string getSpell(string cn)
{
byte[] arrCN = Encoding.Default.GetBytes(cn);
if (arrCN.Length > 1)
{
int area = (short)arrCN[0];
int pos = (short)arrCN[1];
int code = (area << 8) + pos;
int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };
for (int i = 0; i < 26; i++)
{
int max = 55290;
if (i != 25) max = areacode[i + 1];
if (areacode[i] <= code && code < max)
{
return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
}
}
return "?";
}
else return cn;
}
#endregion
半角转全角#region 半角转全角
/**//**/
/**//// <summary>
/// 半角转全角
/// </summary>
/// <param name="BJstr"></param>
/// <returns></returns>
static public string GetQuanJiao(string BJstr)
{
char[] c = BJstr.ToCharArray();
for (int i = 0; i < c.Length; i++)
{
byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
if (b.Length == 2)
{
if (b[1] == 0)
{
b[0] = (byte)(b[0] - 32);
b[1] = 255;
c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
}
}
}
string strNew = new string(c);
return strNew;
}
#endregion
全角转半角#region 全角转半角
/**//**/
/**//// <summary>
/// 全角转半角
/// </summary>
/// <param name="QJstr"></param>
/// <returns></returns>
static public string GetBanJiao(string QJstr)
{
char[] c = QJstr.ToCharArray();
for (int i = 0; i < c.Length; i++)
{
byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
if (b.Length == 2)
{
if (b[1] == 255)
{
b[0] = (byte)(b[0] + 32);
b[1] = 0;
c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
}
}
}
string strNew = new string(c);
return strNew;
}
#endregion
生成随机数#region 生成随机数
/**//**/
/**//// <summary>
/// 生成随机数
/// </summary>
/// <returns></returns>
static 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();
}
System.Web.HttpContext.Current.Response.Cookies.Add(new HttpCookie("CheckCode", checkCode));
return checkCode;
}
#endregion
生成验证码图片生成验证码图片#region 生成验证码图片生成验证码图片
/**//// <summary>
/// 生成验证码图片
/// </summary>
public static void CreateCheckCodeImage()
{
string checkCode = GenerateCheckCode();
System.Web.HttpContext.Current.Session["username"] = checkCode ;
//Console.Write(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);
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType = "image/Gif";
HttpContext.Current.Response.BinaryWrite(ms.ToArray());
}
finally
{
g.Dispose();
image.Dispose();
}
}
#endregion
获取文本框中输入内容#region 获取文本框中输入内容
/**//**/
/**//// <summary>
/// 获取文本框中输入内容
/// </summary>
/// <param name="ctrl">TextBox控件ID</param>
/// <returns></returns>
static public string GetText(TextBox ctrl)
{
return ctrl.Text.Trim().Replace("'", "\"");
}
#endregion
清除文本框内容#region 清除文本框内容
/**//**/
/**//// <summary>
/// 清除文本框内容
/// </summary>
/// <param name="list">TextBox控件数组</param>
static public void ClearText(TextBox[] list)
{
foreach (TextBox ctrl in list)
ctrl.Text = null;
}
#endregion
加密的类型#region 加密的类型
/**//**/
/**//// <summary>
/// 加密的类型
/// </summary>
public enum PasswordType
{
SHA1,
MD5
}
#endregion
字符串加密#region 字符串加密
/**//// <summary>
/// 字符串加密
/// </summary>
/// <param name="PasswordString">要加密的字符串</param>
/// <param name="PasswordFormat">要加密的类别</param>
/// <returns></returns>
static public string EncryptPassword(string PasswordString, string PasswordFormat)
{
switch (PasswordFormat)
{
case "SHA1":
{
PasswordString = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "SHA1");
break;
}
case "MD5":
{
PasswordString = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(PasswordString, "MD5");
break;
}
default:
{
// passWord = string.Empty;
break;
}
}
return PasswordString;
}
#endregion
}
原文地址：https://www.cnblogs.com/Hdsome/p/1215216.html