/// <summary>
/// 取得运算随机字符串，并设置Session值
/// </summary>
public static void IdentifyCode2()
{
string[] number1 = new string[] { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };
string[] number2 = new string[] { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10" };
string[] operate = new string[] { "加", "减" };
string[] equals = new string[] { "=", "等于" };
IList <string[]> number = new List <string[]>();
number.Add(number1);
number.Add(number2);
Random r = new Random();
int num1 = r.Next(1, 11);
int num2 = r.Next(1, 11);
int result = 0;
int operation = r.Next(0, 2);
if (operation == 0)
{
result = num1 + num2;
}
else
{
if (num1 < num2)
{
int num3 = 0;
num3 = num1;
num1 = num2;
num2 = num3;
}
result = num1 - num2;
}
string checkCode = string.Empty;
checkCode = ((string[])number[r.Next(0, 2)])[num1 - 1];
checkCode += operate[operation];
checkCode += ((string[])number[r.Next(0, 2)])[num2 - 1];
checkCode += equals[r.Next(0, 2)];
checkCode += "?";
Cookie2.Set("IdentifyCode", result.ToString());
DrawIdentifyCode2(checkCode);
}
//#endregion
//#region IdentifyCode
/// <summary>
/// 取得随机字符串，并设置Session值
/// </summary>
/// <example>
/// <code>
/// string strIdentifyCode = Pub.Class.Identify.IdentifyCode(4);
/// Pub.Class.Identify.DrawIdentifyCode(strIdentifyCode, 50, 100);
/// Response.End();
/// 在登录页面引用此文件:<img src="Valid.aspx" border="0" />
/// Session["IdentifyCode"]
/// </code>
/// </example>
/// <param name="intLength">长</param>
/// <returns>取得随机字符串</returns>
public static string IdentifyCode(int intLength)
{
int intNumber;
char chrCode;
string strIdentifyCode = String.Empty;
Random rndRandom = new Random();
for (int i = 0; i < intLength; i++)
{
intNumber = rndRandom.Next();
if (intNumber % 2 == 0)
{
chrCode = (char)('0' + (char)(intNumber % 10));//如果随机数是偶数 取余
}
else
{
chrCode = (char)('A' + (char)(intNumber % 26));//如果随机数是奇数 选择从[A-Z]
}
strIdentifyCode += chrCode.ToString();
}
Cookie2.Set("IdentifyCode", strIdentifyCode);
return(strIdentifyCode);
}
//#endregion
//#region COOKIES防刷新页面代码
/// <summary>
/// 设置打开页面的时间
/// </summary>
public static void SetDateTime()
{
Cookie2.Set("__sysTime", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
}