使用asp.net开发客户端脚本代码(Chinese ,from csdn)

最新推荐文章于 2024-06-20 09:28:34 发布

原创最新推荐文章于 2024-06-20 09:28:34 发布 · 1.5k 阅读

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#脚本 #asp.net #string #microsoft #javascript #input

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博客介绍了将RegisterClientScriptBlock方法与IsClientScriptBlockRegistered方法配合使用的示例，给出了Visual Basic和C#的代码实现。还展示了自定义的MessageBox方法，通过StringBuilder拼接JavaScript脚本，并利用IsStartupScriptRegistered和RegisterStartupScript进行脚本注册。

下面的示例说明如何将 RegisterClientScriptBlock 方法与 IsClientScriptBlockRegistered 方法配合使用。如果尚未注册用代码声明块编写的 ECMAScript（如 IsClientScriptBlockRegistered 测试的那样），则将发出 RegisterClientScriptBlock 调用。 [Visual Basic] <html> <head> <script language="VB" runat="server"> Sub Page_Load( sender as Object,e as EventArgs) 'Form the script that is to be registered at client side. Dim scriptString as String = "<script language=JavaScript> function DoClick() {" scriptString += "myForm.show.value='Welcome to Microsoft .NET'}<" scriptString += "/" scriptString += "script>" If(Not IsClientScriptBlockRegistered("clientScript")) RegisterClientScriptBlock("clientScript", scriptString) End If End Sub </script> </head> <body topmargin="20" leftmargin="10"> <form id="myForm" runat="server"> <input type="text" id="show" style="width=200"> <input type="button" value="ClickMe" onclick="DoClick()"> </form> </body> </html> [C#] <html> <head> <script language="C#" runat="server"> public void Page_Load(Object sender, EventArgs e) { // Form the script that is to be registered at client side. String scriptString = "<script language=JavaScript> function DoClick() {"; scriptString += "myForm.show.value='Welcome to Microsoft .NET'}<"; scriptString += "/"; scriptString += "script>"; if(!this.IsClientScriptBlockRegistered("clientScript")) this.RegisterClientScriptBlock("clientScript", scriptString); } </script> </head> <body topmargin="20" leftmargin="10"> <form id="myForm" runat="server"> <input type="text" id="show" style="width=200"> <input type="button" value="ClickMe" onclick="DoClick()"> </form> </body> </html>

我的写法 public static void MessageBox( Page page, string msg ) { StringBuilder StrScript = new StringBuilder(); StrScript.Append( "<script language=javascript>" ); StrScript.Append( "alert('"+ msg +"');" ); StrScript.Append( "</script>" ); if ( ! page.IsStartupScriptRegistered( "MessageBox" ) ) { page.RegisterStartupScript( "MessageBox", StrScript.ToString() ); } }

我是写一个类封装了所有可能要用的方法：
using System;
using System.Web;
using System.Web.UI;

namespace SHBT
{
	/// <summary>
	/// Alert 的摘要说明。
	/// </summary>
	public class Alert
	{
		public Alert()
		{
			//
			// TODO: 在此处添加构造函数逻辑
			//
		}

private static string scriptbegin = "<script  language=/"JavaScript/">";
		private static string scriptend = "</script>";

/// <summary>
		/// 弹出对话框
		/// </summary>
		/// <param name="content"></param>
		public static void ShowAlert(string content)
		{
			string alertcontent = "alert('" + content + "');";
			alertcontent = scriptbegin + alertcontent + scriptend;
			Page p = (Page)System.Web.HttpContext.Current.Handler;
			p.RegisterStartupScript("alert",alertcontent);
			
		}

/// <summary>
		/// 执行脚本
		/// </summary>
		/// <param name="content"></param>
		public static void ExeScript(string content)
		{
			content = scriptbegin + content + scriptend;
			Page p = (Page)System.Web.HttpContext.Current.Handler;
			p.RegisterStartupScript("Script",content);
		}

/// <summary>
		/// 执行脚本
		/// </summary>
		/// <param name="content"></param>
		public static void ExeScriptBlock(string content)
		{
			content = scriptbegin + content + scriptend;
			Page p = (Page)System.Web.HttpContext.Current.Handler;
			p.RegisterClientScriptBlock("Script",content);
		}

}
}

别的类中可以直接调用里面的静态方法非常方便。