ASP.Net/Validation by Control/Validate Panel

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Validate a panel (C#)

   <source lang="csharp">

<%@ Page Language="C#" %> <script runat="server"> 

   void btnSubmit_Click(Object sender, EventArgs e)
   {
       if (Page.IsValid)
       {
           lblResult.Text = @"
Product: " + txtProductName.Text
               + "
Price: " + txtProductPrice.Text
               + "
Quantity: " + txtProductQuantity.Text;
       }
   }

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server"> 

   <title>Order Form</title>

</head> <body> 

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

   <fieldset>
   <legend>Product Order Form</legend>
   
   <asp:Label
       id="lblProductName"
       Text="Product Name:"
       AssociatedControlID="txtProductName"
       Runat="server" />
   

   <asp:TextBox
       id="txtProductName"
       Runat="server" />
   <asp:RequiredFieldValidator
       id="reqProductName"
       ControlToValidate="txtProductName"
       Text="(Required)"
       Runat="server" />
       
   


       
   <asp:Label
       id="lblProductPrice"
       Text="Product Price:"
       AssociatedControlID="txtProductPrice"
       Runat="server" />
   
    
   <asp:TextBox
       id="txtProductPrice"
       Columns="5"
       Runat="server" />    
   <asp:RequiredFieldValidator
       id="reqProductPrice"
       ControlToValidate="txtProductPrice"
       Text="(Required)"
       Display="Dynamic"
       Runat="server" />
   <asp:CompareValidator
       id="cmpProductPrice"
       ControlToValidate="txtProductPrice"
       Text="(Invalid Price)"
       Operator="DataTypeCheck"
       Type="Currency"
       Runat="server" />
   


   <asp:Label
       id="lblProductQuantity"
       Text="Product Quantity:"
       AssociatedControlID="txtProductQuantity"
       Runat="server" />
   
        
   <asp:TextBox
       id="txtProductQuantity"
       Columns="5"
       Runat="server" />    
   <asp:RequiredFieldValidator
       id="reqProductQuantity"
       ControlToValidate="txtProductQuantity"
       Text="(Required)"
       Display="Dynamic"
       Runat="server" />
   <asp:CompareValidator
       id="CompareValidator1"
       ControlToValidate="txtProductQuantity"
       Text="(Invalid Quantity)"
       Operator="DataTypeCheck"
       Type="Integer"
       Runat="server" />
   


   
   <asp:Button
       id="btnSubmit"
       Text="Submit Product Order"
       OnClick="btnSubmit_Click" 
       Runat="server" />
   
   </fieldset>
   <asp:Label
       id="lblResult"
       Runat="server" />
   

   </form>

</body> </html> 

      </source>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Validation_by_Control/Validate_Panel&oldid=1809»