ValidationSummary.Render(HtmlTextWriter) Metode
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mengirim konten kontrol server ke objek yang disediakan HtmlTextWriter , yang menulis konten yang akan dirender pada klien.
protected:
override void Render(System::Web::UI::HtmlTextWriter ^ writer);
protected public:
override void Render(System::Web::UI::HtmlTextWriter ^ writer);
protected override void Render (System.Web.UI.HtmlTextWriter writer);
protected internal override void Render (System.Web.UI.HtmlTextWriter writer);
override this.Render : System.Web.UI.HtmlTextWriter -> unit
Protected Overrides Sub Render (writer As HtmlTextWriter)
Protected Friend Overrides Sub Render (writer As HtmlTextWriter)
Parameter
- writer
- HtmlTextWriter
Aliran output yang merender konten HTML ke klien.
Contoh
Contoh kode berikut menunjukkan cara mengambil Render alih metode dalam kontrol server kustom sehingga kontrol dikelilingi ValidationSummary oleh Small tag.
Penting
Contoh ini memiliki kotak teks yang menerima input pengguna, yang merupakan potensi ancaman keamanan. Secara default, ASP.NET halaman Web memvalidasi bahwa input pengguna tidak menyertakan elemen skrip atau HTML. Untuk informasi selengkapnya, lihat Gambaran Umum Eksploitasi Skrip.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Custom ValidationSummary - Render - C# Example</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom ValidationSummary - Render - C# Example</h3>
<table id="Table1" cellpadding="4" cellspacing="0">
<tr>
<td>
<table id="Table2" cellpadding="4" cellspacing="0" style="background-color:#eeeeee">
<tr>
<td colspan="3"><b>Credit Card Information</b> </td>
</tr>
<tr>
<td align="right">Card Type: </td>
<td>
<asp:RadioButtonList id="RadioButtonList1" runat="server" RepeatLayout="Flow">
<asp:ListItem>MasterCard</asp:ListItem>
<asp:ListItem>Visa</asp:ListItem>
</asp:RadioButtonList>
</td>
<td align="center" rowspan="1">
<asp:RequiredFieldValidator
id="RequiredFieldValidator1"
runat="server"
ErrorMessage="Card Type"
Width="100%"
Display="Static"
ControlToValidate="RadioButtonList1">*
</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="right">Card Number: </td>
<td><asp:TextBox id="TextBox1" runat="server"></asp:TextBox></td>
<td>
<asp:RequiredFieldValidator
id="RequiredFieldValidator2"
runat="server"
ErrorMessage="Card Number"
Width="100%"
Display="Static"
ControlToValidate="TextBox1">*
</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td></td>
<td><asp:Button id="Button1" runat="server" text="Validate"></asp:Button></td>
<td></td>
</tr>
</table>
</td>
</tr>
<tr>
<td valign="top">
<aspSample:CustomValidationSummaryRender
id="ValidationSummary1"
runat="server"
DisplayMode="BulletList"
HeaderText="You must enter a value in the following fields:" />
</td>
</tr>
</table>
</form>
</body>
</html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Custom ValidationSummary - Render - VB.NET Example</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom ValidationSummary - Render - VB.NET Example</h3>
<table id="Table1" cellpadding="4" cellspacing="0">
<tr>
<td>
<table id="Table2" cellpadding="4" cellspacing="0" style="background-color:#eeeeee">
<tr>
<td colspan="3"><b>Credit Card Information</b> </td>
</tr>
<tr>
<td align="right">Card Type: </td>
<td><asp:RadioButtonList id="RadioButtonList1" runat="server" RepeatLayout="Flow">
<asp:ListItem>MasterCard</asp:ListItem>
<asp:ListItem>Visa</asp:ListItem>
</asp:RadioButtonList>
</td>
<td align="center" rowspan="1">
<asp:RequiredFieldValidator id="RequiredFieldValidator1"
runat="server" ErrorMessage="Card Type" Width="100%"
Display="Static" ControlToValidate="RadioButtonList1">*</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="right">Card Number: </td>
<td><asp:TextBox id="TextBox1" runat="server"></asp:TextBox></td>
<td>
<asp:RequiredFieldValidator id="RequiredFieldValidator2"
runat="server" ErrorMessage="Card Number" Width="100%"
Display="Static" ControlToValidate="TextBox1">*</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td></td>
<td><asp:Button id="Button1" runat="server" text="Validate"></asp:Button></td>
<td></td>
</tr>
</table>
</td>
</tr>
<tr>
<td valign="top">
<aspSample:CustomValidationSummaryRender
id="ValidationSummary1" runat="server" DisplayMode="BulletList"
HeaderText="You must enter a value in the following fields:" />
</td>
</tr>
</table>
</form>
</body>
</html>
using System.Web;
using System.Security.Permissions;
namespace Samples.AspNet.CS.Controls
{
[AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class CustomValidationSummaryRender : System.Web.UI.WebControls.ValidationSummary
{
protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
// Write out begining Small HTML tag.
writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Small);
// Call the base class's Render method.
base.Render(writer);
// Write out ending Small HTML tag.
writer.RenderEndTag();
}
}
}
Imports System.Web
Imports System.Security.Permissions
Namespace Samples.AspNet.VB.Controls
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomValidationSummaryRender
Inherits System.Web.UI.WebControls.ValidationSummary
Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)
' Write out begining Small HTML tag.
writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Small)
' Call the base class's Render method.
MyBase.Render(writer)
' Write out ending Small HTML tag.
writer.RenderEndTag()
End Sub
End Class
End Namespace
Berlaku untuk
Saran dan Komentar
https://aka.ms/ContentUserFeedback.
Segera hadir: Sepanjang tahun 2024 kami akan menghentikan penggunaan GitHub Issues sebagai mekanisme umpan balik untuk konten dan menggantinya dengan sistem umpan balik baru. Untuk mengetahui informasi selengkapnya, lihat:Kirim dan lihat umpan balik untuk