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/**//// <summary>
/// Ãû³Æ£ºIsNumberic
/// ¹¦ÄÜ£ºÅжÏÊäÈëµÄÊÇ·ñÊÇÊý×Ö
/// ²ÎÊý£ºstring oText£ºÔ´Îı¾
/// ·µ»ØÖµ£º¡¡bool true:ÊÇ¡¡false:·ñ
/// </summary>
public bool IsNumberic(string oText)
{
try
{
int var1=Convert.ToInt32 (oText);
return true;
}
catch
{
return false;
}
}
     try catch·½·¨
     Àý£º
     try
     {
       Convert.ToInt32("123"):
       Console.Write("ÊÇÊý×Ö");
     }
     catch(Exception ex)
     {
       Console.Write("·ÇÊý×Ö");
     }
     ×¢£ºÈç¹ûÓкܶà×Ö·û´®ÒªÇóÅжϣ¬´Ë·½·¨ÐèÒª´óÁ¿µÄtry catch ÒÔ¼°finallyÀ´´¦ÀíºóÐøµÄ³ÌÐò.²»½¨ÒéʹÓô˷½·¨¡£
¸Ä½øÒ»ÏÂ:
ÒòΪ¿ÉÒÔתint ¿ÉÒÔתDecimal
    public bool IsNumberic(string oText)
    {
        try
        {
            Decimal Number = Convert.ToDecimal (oText);
            return true;
        }
        catch
        {
            return false;
        }
    }
·½°¸¶þ:
//Èç¹ûÊÇ´¿Êý×Ö»¹¿ÉÒÔ²ÉÓÃASCIIÂë½øÐÐÅжÏ
/// <summary>  
/// ÅжÏÊÇ·ñÊÇÊý×Ö  
/// </summary>  
/// <param name="str">×Ö·û´®</param>  
/// <returns>bool</returns>  
public bool IsNumeric(string str)  
{  
    if (str == null || str.Length == 0) &nbs