验证控件的使用二（RequiredFieldValidator ）

  

   <
   script runat
   =
   "
   server
   "
   >
   
 
   protected
    
   void
    Button1_Click(Object sender, EventArgs e) {
 
   if
    (Page.IsValid) {
 Label1.Text 
   =
    
   "
   Page is valid!
   "
   ;
 }
 }

   </
   script
   >
   


   <
   html xmlns
   =
   "
   http://www.w3.org/1999/xhtml
   "
    
   >
   

   <
   head runat
   =
   "
   server
   "
    id
   =
   "
   Head1
   "
   >
   
 
   <
   title
   >
   RequiredFieldValidator
   </
   title
   >
   

   </
   head
   >
   

   <
   body
   >
   
 
   <
   form id
   =
   "
   form1
   "
    runat
   =
   "
   server
   "
   >
   
 
   <
   div
   >
   
 
   <
   asp:TextBox ID
   =
   "
   TextBox1
   "
    Runat
   =
   "
   server
   "
   ></
   asp:TextBox
   >
   
 
   <
   asp:RequiredFieldValidator ID
   =
   "
   RequiredFieldValidator1
   "
    Runat
   =
   "
   server
   "
    Text
   =
   "
   Required!
   "
    ControlToValidate
   =
   "
   TextBox1
   "
   >
   
 
   </
   asp:RequiredFieldValidator
   >
   
 
   <
   br 
   />
   
 
   <
   asp:Button ID
   =
   "
   Button1
   "
    Runat
   =
   "
   server
   "
    Text
   =
   "
   Submit
   "
    OnClick
   =
   "
   Button1_Click
   "
    
   />
   
 
   <
   br 
   />
   
 
   <
   br 
   />
   
 
   <
   asp:Label ID
   =
   "
   Label1
   "
    Runat
   =
   "
   server
   "
   ></
   asp:Label
   >
    
 
   </
   div
   >
   
 
   </
   form
   >
   

   </
   body
   >
   

   </
   html
   >
  

InitialValue 表示默认值 文本框

 

  

    1 
   <
   script runat
   =
   "
   server
   "
   >
   

    2 
    
   protected
    
   void
    Button1_Click(Object sender, EventArgs e) {

    3 
    
   if
    (Page.IsValid) {

    4 
    Label1.Text 
   =
    
   "
   Page is valid!
   "
   ;

    5 
    }

    6 
    }

    7 
    
   </
   script
   >
   

    8 
   

    9 
   
   <
   html xmlns
   =
   "
   http://www.w3.org/1999/xhtml
   "
    
   >
   

   10 
   
   <
   head runat
   =
   "
   server
   "
    id
   =
   "
   Head1
   "
   >
   

   11 
    
   <
   title
   >
   RequiredFieldValidator
   </
   title
   >
   

   12 
   
   </
   head
   >
   

   13 
   
   <
   body
   >
   

   14 
    
   <
   form id
   =
   "
   form1
   "
    runat
   =
   "
   server
   "
   >
   

   15 
    
   <
   div
   >
   

   16 
   
   <
   asp:TextBox ID
   =
   "
   TextBox1
   "
    Runat
   =
   "
   server
   "
   >
   My Initial Value
   </
   asp:TextBox
   >&
   nbsp; 

   17 
   

   18 
   
   <
   asp:RequiredFieldValidator ID
   =
   "
   RequiredFieldValidator1
   "
    Runat
   =
   "
   server
   "
    

   19 
    Text
   =
   "
   Please change value
   "
    ControlToValidate
   =
   "
   TextBox1
   "
    

   20 
    InitialValue
   =
   "
   My Initial Value
   "
   ></
   asp:RequiredFieldValidator
   >
   

   21 
   

   22 
   
   <
   asp:RequiredFieldValidator ID
   =
   "
   RequiredFieldValidator2
   "
    Runat
   =
   "
   server
   "
    

   23 
    Text
   =
   "
   Do not leave empty
   "
    ControlToValidate
   =
   "
   TextBox1
   "
   >
    

   24 
   
   </
   asp:RequiredFieldValidator
   >
   

   25 
   

   26 
    
   <
   br 
   />
   

   27 
    
   <
   asp:Button ID
   =
   "
   Button1
   "
    Runat
   =
   "
   server
   "
    Text
   =
   "
   Submit
   "
    OnClick
   =
   "
   Button1_Click
   "
    
   />
   

   28 
    
   <
   br 
   />
   

   29 
    
   <
   br 
   />
   

   30 
    
   <
   asp:Label ID
   =
   "
   Label1
   "
    Runat
   =
   "
   server
   "
   ></
   asp:Label
   >
    

   31 
    
   </
   div
   >
   

   32 
    
   </
   form
   >
   

   33 
   
   </
   body
   >