globaldb.cs

本系统实现了网上考试的目的

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.Collections;
using System.Text;
using System.Data.SqlClient;

/// <summary>
/// GlobalDB 的摘要说明
/// </summary>
public class GlobalDB
{//自定义Exception
    public class MyException : Exception
    {
        //包含系统Excepton
        public MyException(string source, string message, Exception inner)
            : base(message, inner)
        {
            base.Source = source;
        }

        //不包含系统Exception
        public MyException(string source, string message)
            : base(message)
        {
            base.Source = source;
        }
    }
    //自定义字符串处理类CleanString
    public sealed class CleanString
    {//定义InputText函数处理用于输入
        public static string InputText(string inputString, int maxLength)
        {
            StringBuilder retVal = new StringBuilder();    //构造临时字符串数组
            if ((inputString != null) && (inputString != String.Empty))
            {
                inputString = inputString.Trim();  //清空字符串两段的空白符号
                //设置字符串的长度
                if (inputString.Length > maxLength)
                {
                    inputString = inputString.Substring(0, maxLength);
                }

               
                for (int i = 0; i < inputString.Length; i++)
                {
                    switch (inputString[i])    //替换危险字符串
                    {
                        case '"':
                            retVal.Append("&quot;");
                            break;
                        case '<':
                            retVal.Append("&lt;");
                            break;
                        case '>':
                            retVal.Append("&gt;");
                            break;
                        default:
                            retVal.Append(inputString[i]);
                            break;
                    }
                }

                
                retVal.Replace("'", " ");
            }

            return retVal.ToString();
        }
    }
	
}