前台页面AjaxTest.htm,内容如下
| 代码如下 |
复制代码 |
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https://www.111cn.net>
本页用不同的方式与后台进行交互
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后台建立一个Handler.ashx页面 内容如下
| 代码如下 |
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using System;
using System.Web;
public class Handler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
if (context.Request["command"]!=null)
{
//得到前台传过来的command,确定调用哪个方法
string command = context.Request["command"].ToString();
string data = context.Request["value"].ToString();
switch (command)
{
case "method1":
method1(context);
break;
case "method2":
method2(context);
break;
default:
break;
}
}
}
public bool IsReusable {
get {
return false;
}
}
public void method1(HttpContext context)
{
context.Response.Write("hello,"+context.Request["value"].ToString());
}
public void method2(HttpContext context)
{
context.Response.Write("hello,"+context.Request["value"].ToString());
}
}
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如果有多个方法,switch case里的判断将会很多.考虑用更简单的方法.使用反射
| 代码如下 |
复制代码 |
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using System;
using System.Web;
public class Handler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
if (context.Request["command"] != null)
{
//
string command = context.Request["command"].ToString();
System.Reflection.MethodInfo method = this.GetType().GetMethod(command);
if (method != null)
{
method.Invoke(this, new object[] { context});
}
}
}
public bool IsReusable {
get {
return false;
}
}
public void method1(HttpContext context)
{
context.Response.Write("hello"+context.Request["value"].ToString());
}
public void method2(HttpContext context)
{
context.Response.Write("hello,"+context.Request["value"].ToString());
}
}
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使用反射大大简化了程序.
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使用aspx页面与ajax交互
新建一个aspx页面 WebMethod.aspx
将WebMethod.aspx页里的多余部分删除,只保留
这一条语句
WebMethod.aspx.cs内容如下
| 代码如下 |
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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.Services;
using System.Reflection;
public partial class WebMethod : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string methodName = HttpContext.Current.Request.PathInfo.Substring(1);
// Response.Write(methodName);
MethodInfo method = this.GetType().GetMethod(methodName);
if (method != null)
{
Response.Write(method.Invoke(this,new object[]{}));
}
// Response.Write(GetResult());
}
[WebMethod(EnableSession=true)]
public string GetResult()
{
//return "hello";
if (HttpContext.Current.Request["name"] != null)
{
string value = HttpContext.Current.Request["name"].ToString();
//HttpContext.Current.Request.PathInfo;
return "{'name':'"+value+"'}";
}
else
{
return "{name:'error'}";
}
}
}
test.html页面与WebMethod.aspx页面进行ajax交互 test.html页面内容
使用aspx页面进行交互
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