ASP.Net/Validation by Control/Validate Panel

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Validate a panel (C#)

<%@ Page Language="C#" %>
<script runat="server">
    void btnSubmit_Click(Object sender, EventArgs e)
    {
        if (Page.IsValid)
        {
            lblResult.Text = @"<br />Product: " + txtProductName.Text
                + "<br />Price: " + txtProductPrice.Text
                + "<br />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">
    <div>
    
    <fieldset>
    <legend>Product Order Form</legend>
    
    <asp:Label
        id="lblProductName"
        Text="Product Name:"
        AssociatedControlID="txtProductName"
        Runat="server" />
    <br />
    <asp:TextBox
        id="txtProductName"
        Runat="server" />
    <asp:RequiredFieldValidator
        id="reqProductName"
        ControlToValidate="txtProductName"
        Text="(Required)"
        Runat="server" />
        
    <br /><br />
        
    <asp:Label
        id="lblProductPrice"
        Text="Product Price:"
        AssociatedControlID="txtProductPrice"
        Runat="server" />
    <br />    
    <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" />
    <br /><br />
    <asp:Label
        id="lblProductQuantity"
        Text="Product Quantity:"
        AssociatedControlID="txtProductQuantity"
        Runat="server" />
    <br />        
    <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" />
    <br /><br />
    
    <asp:Button
        id="btnSubmit"
        Text="Submit Product Order"
        OnClick="btnSubmit_Click" 
        Runat="server" />
    
    </fieldset>
    <asp:Label
        id="lblResult"
        Runat="server" />
    
    </div>
    </form>
</body>
</html>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Validation_by_Control/Validate_Panel&oldid=1809»