C#生成隨機字符串

//<summary>
///得到隨機字符.
///</summary>
///<param name="intLength">Length of the int.</param>
///<param name="booNumber">if set to <c>true</c> [boo number].</param>
///<param name="booSign">if set to <c>true</c> [boo sign].</param>
///<param name="booSmallword">if set to <c>true</c> [boo smallword].</param>
///<param name="booBigword">if set to <c>true</c> [boo bigword].</param>
///<returns></returns>

public string getRandomizer(int intLength, bool booNumber, bool booSign, bool booSmallword, bool booBigword)
{
//定義
Random ranA = new Random();
int intResultRound = 0;
int intA = 0;
string strB = "";
while (intResultRound < intLength)
{
//生成隨機數A，表示生成類型
//1=數字，2=符號，3=小寫字母，4=大寫字母
intA = ranA.Next(1, 5);
//如果隨機數A=1，則運行生成數字
//生成隨機數A，范圍在0-10
//把隨機數A，轉成字符
//生成完，位數+1，字符串累加，結束本次循環
if (intA == 1 && booNumber)
{
intA = ranA.Next(0, 10);
strB = intA.ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
//如果隨機數A=2，則運行生成符號
//生成隨機數A，表示生成值域
//1：33-47值域，2：58-64值域，3：91-96值域，4：123-126值域
if (intA == 2 && booSign == true)
{
intA = ranA.Next(1, 5);
//如果A=1
//生成隨機數A，33-47的Ascii碼
//把隨機數A，轉成字符
//生成完，位數+1，字符串累加，結束本次循環
if (intA == 1)
{
intA = ranA.Next(33, 48);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}

//如果A=2
//生成隨機數A，58-64的Ascii碼
//把隨機數A，轉成字符
//生成完，位數+1，字符串累加，結束本次循環
if (intA == 2)
{
intA = ranA.Next(58, 65);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}

//如果A=3
//生成隨機數A，91-96的Ascii碼
//把隨機數A，轉成字符
//生成完，位數+1，字符串累加，結束本次循環
if (intA == 3)
{
intA = ranA.Next(91, 97);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}

//如果A=4
//生成隨機數A，123-126的Ascii碼
//把隨機數A，轉成字符
//生成完，位數+1，字符串累加，結束本次循環
if (intA == 4)
{
intA = ranA.Next(123, 127);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
}

//如果隨機數A=3，則運行生成小寫字母
//生成隨機數A，范圍在97-122
//把隨機數A，轉成字符
//生成完，位數+1，字符串累加，結束本次循環
if (intA == 3 && booSmallword == true)
{
intA = ranA.Next(97, 123);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}

//如果隨機數A=4，則運行生成大寫字母
//生成隨機數A，范圍在65-90
//把隨機數A，轉成字符
//生成完，位數+1，字符串累加，結束本次循環
if (intA == 4 && booBigword == true)
{
intA = ranA.Next(65, 89);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
}
return strB;
}