asp.net 判断字符串是否是数字的，int的，整型的
- #region 判断字符串是否是数字的
- /// <summary>
- /// 判断是否是数字
- /// </summary>
- /// <param name="str">字符串</param>
- /// <returns>bool</returns>
- publicbool IsNumeric(string str)
- {
- if (str == null || str.Length == 0)
- returnfalse;
- System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
- byte[] bytestr = ascii.GetBytes(str);
- foreach (byte c in bytestr)
- {
- if (c < 48 || c > 57)
- {
- returnfalse;
- }
- }
- returntrue;
- }