C#中的RenderControl怎么使用

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2023/7/13 19:38:21
栏目: 编程语言
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在C#中,RenderControl是一个方法,用于将Web控件的内容呈现到指定的HtmlTextWriter对象中。

以下是RenderControl方法的使用示例:

  1. 创建一个HtmlTextWriter对象:
StringWriter stringWriter = new StringWriter();
HtmlTextWriter writer = new HtmlTextWriter(stringWriter);
  1. 创建一个Web控件,并将其内容呈现到HtmlTextWriter对象中:
Button btn = new Button();
btn.Text = "Click me";
btn.RenderControl(writer);
  1. 获取呈现的内容:
string renderedHtml = stringWriter.ToString();

完整示例:

using System;
using System.IO;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
StringWriter stringWriter = new StringWriter();
HtmlTextWriter writer = new HtmlTextWriter(stringWriter);
Button btn = new Button();
btn.Text = "Click me";
btn.RenderControl(writer);
string renderedHtml = stringWriter.ToString();
// 输出呈现的内容
Response.Write(renderedHtml);
}
}
}

当访问页面时,将输出一个按钮的HTML代码:

<input type="submit" name="ctl00$MainContent$btn" value="Click me" id="MainContent_btn" />

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