只允許輸入數字的多種表現形式....

程序中，我們經常用到只需要輸入數字的地方..
示例1：用數組來實現
(VB.Net 部分)
               Private istg_char() As Char = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"}   ' 定義一個數組
               
              Dim istg_check_char as string
               istg_check_char=Text1.Text.Trim(Me.istg_char)
               If istg_check_char="" then
                    Messagebox.show("為數字型")
               else
                    Messagebox.show("為字符串")
                End If    

(C# 部分)
                char[] number=new char(10){'0','1','2','3','4','5','6','7','8','9'};
                   
                strng check=textbox1.text.trim(number);
                if(check= ="")
                    {
                        MessageBox.Show("為數字型");
                    }
                   Else
                    {
                    Messagebox.show("為字符串");
                    }