如何验证textBox输入的是数字，字符

Question

a)         纯数字 – [0-9]*b)        纯字母 – [a-zA-Z]*

Answer 1

在ToolBox工具条中找到并拖出RegularExpressionValidator控件到你的TextBox所在的文件...
然后选中它，设置ValidationExpression属性中写入  \d+
然后设置ControlToValidate属性中选择要验证的TextBox的ID
就ok啦

Answer 2

(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");
                    }    

Answer 3

http://blog.csdn.net/zwxrain/archive/2004/12/22/225408.aspx