C#验证输入是否未数字类型

public bool IsNumber(String strNumber)
{
Regex objNotNumberPattern = new Regex("[^0-9.-]");
Regex objTwoDotPattern = new Regex("[0-9][.][0-9][.][0-9]");
Regex objTwoMinusPattern = new Regex("[0-9][-][0-9][-][0-9]");
String strValidRealPattern = "^([-]|[.]|[-.]|[0-9])[0-9][.][0-9]+$";
String strValidIntegerPattern = "^([-]|[0-9])[0-9]*$";
Regex objNumberPattern = new Regex("(" + strValidRealPattern + ")|(" + strValidIntegerPattern + ")");
Regex objNumberPattern = new Regex("(" + strValidIntegerPattern + ")");
return !objNotNumberPattern.IsMatch(strNumber) &&
!objTwoDotPattern.IsMatch(strNumber) &&
!objTwoMinusPattern.IsMatch(strNumber) &&
objNumberPattern.IsMatch(strNumber);
}

调用

var sp= IsNumber(Sparestr2.Value);
if (!sp)
{
ShowMsgHelper.Alert_Error("格式不正确！");
return;
}