代碼 ///?<summary>
????????///?判斷一個字符串是否為合法整數(shù)(不限制長度)
????????///?</summary>
????????///?<param?name="s">字符串</param>
????????///?<returns></returns>
????????public?static?bool?IsInteger(string?s)
????????{
????????????string?pattern?=?@"^\d*$";
????????????return?Regex.IsMatch(s,pattern);
????????}
????????/**////?<summary>
????????///?判斷一個字符串是否為合法數(shù)字(0-32整數(shù))
????????///?</summary>
????????///?<param?name="s">字符串</param>
????????///?<returns></returns>
????????public?static?bool?IsNumber(string?s)
????????{
????????????return?IsNumber(s,32,0);
????????}
????????/**////?<summary>
????????///?判斷一個字符串是否為合法數(shù)字(指定整數(shù)位數(shù)和小數(shù)位數(shù))
????????///?</summary>
????????///?<param?name="s">字符串</param>
????????///?<param?name="precision">整數(shù)位數(shù)</param>
????????///?<param?name="scale">小數(shù)位數(shù)</param>
????????///?<returns></returns>
????????public?static?bool?IsNumber(string?s,int?precision,int?scale)
????????{
????????????if((precision?==?0)&&(scale?==?0))
????????????{
????????????????return?false;
????????????}
????????????string?pattern?=?@"(^\d{1,"+precision+"}";
????????????if(scale>0)
????????????{
????????????????pattern?+=?@"\.\d{0,"+scale+"}$)|"+pattern;
????????????}
????????????pattern?+=?"$)";
????????????return?Regex.IsMatch(s,pattern);
????????}

?

轉(zhuǎn)載于:https://www.cnblogs.com/hantianwei/archive/2010/09/02/1816182.html

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