ASP.NET 简单的 JSON 处理实现 Ajax 功能代码,Asp.Net代码库,德仔网

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【Asp.Net】 ASP.NET 简单的 JSON 处理实现 Ajax 功能
作者:Dezai.CN / 发布于2011/6/15/ 553
<div>[JavaScript]代码</div>
<div>var ajax = {</div>
<div> setDebugMode: function(){
 this.debugMode = true;
 },</div>
<div> get: function (requestUrl, data, loaderImageId, onSuccess, onComplete) {</div>
<div> if (loaderImageId) {
 $("#" + loaderImageId).css('display', 'inline');
 }
<div> var completeFunction = function () {
 if (onComplete) {
 onComplete();
 }
 if (loaderImageId) {
 $("#" + loaderImageId).css('display', 'none');
 }
 };</div>
<div> $.ajax({
 type: "GET",
 url: requestUrl,
 data: data,
 context: this,
 success: function (response) {
 onSuccess(response);
 completeFunction();
 },
 error: function (response) {
 alert("Ajax Request Failed");
 this.showError(response);
 completeFunction();
 }
 });
 },</div>
<div> post: function (requestUrl, data, loaderImageId, onSuccess, onComplete) {</div>
<div> if (loaderImageId) {
 $("#" + loaderImageId).css('display', 'inline');
 }
<div> var completeFunction = function () {
 if (onComplete) {
 onComplete();
 }
 if (loaderImageId) {
 $("#" + loaderImageId).css('display', 'none');
 }
 };</div>
<div> $.ajax({
 type: "POST",
 url: requestUrl,
 context: this,
 data: data,
 success: function (response) {
 onSuccess(response);
 completeFunction();
 },
 error: function (response) {
 alert("Ajax Request Failed");
 this.showError(response);
 completeFunction();
 }
 });
 },</div>
<div> showError: function(requestObject){
 if (this.debugMode){
 alert(requestObject.responseText);
 }
 }
};</div>
<div>JsonRequestHandler.cs</div>
<div>using System;
using System.Collections.Generic;
using System.Web;
using System.Text;
using System.Reflection;
using System.Web.SessionState;</div>
<div>namespace SampleJSONWeb
{
 public abstract class JsonRequestHandler : IHttpHandler, IRequiresSessionState
 {</div>
<div> public abstract void ProcessRequest(HttpContext context);</div>
<div> protected void SetResponse(HttpContext context, string jsonResponse)
 {
 context.Response.Cache.SetExpires(DateTime.Now);
 context.Response.ContentType = "application/json";
 context.Response.Write(jsonResponse);
 context.Response.End();
 }
<div> protected void SetResponse(HttpContext context, Dictionary<string, string> attributes)
 {
 SetResponse(context, GetJsonObject(attributes));
 }
<div> protected void SetResponse<T>(HttpContext context, T obj)
 {
 SetResponse(context, GetJsonObject<T>(obj));
 }
<div> protected T CreateObjectFromRequest<T>(HttpContext context) where T: new()
 {
 T ob = new T();
 PropertyInfo[] properties = typeof(T).GetProperties();
 foreach (PropertyInfo property in properties)
 {
 string value = context.Request.Params[property.Name];
 if (value == null)
 {
 continue;
 }
<div> if (property.PropertyType != typeof(string) && value == string.Empty)
 {
 continue;
 }
<div> object convertedValue = Convert.ChangeType(value, property.PropertyType);
 if (convertedValue == null)
 {
 continue;
 }
<div> property.SetValue(ob, convertedValue, null);
 }
 return ob;
 }
<div> protected string GetJsonObject(Dictionary<string, string> attributes)
 {
 StringBuilder jsonBuilder = new StringBuilder();
 jsonBuilder.Append("{");
 bool firstTime = true;
 foreach (string key in attributes.Keys)
 {
 if (!firstTime)
 {
 jsonBuilder.Append(",");
 }
<div> string name = key;
 object value = attributes[key];
 jsonBuilder.Append("\"" + name + "\":" + value.ToString());
 firstTime = false;
 }
 jsonBuilder.Append("}");
 return jsonBuilder.ToString();
 }
<div> protected string GetJsonCollection<T>(IEnumerable<T> collection)
 {
 StringBuilder jsonBuilder = new StringBuilder();
 jsonBuilder.Append("[");</div>
<div> bool first = true;
 foreach (T item in collection)
 {
 if (!first)
 {
 jsonBuilder.Append(",");
 }
 jsonBuilder.Append(GetJsonObject<T>(item));
 first = false;
 }
<div> jsonBuilder.Append("]");
 return jsonBuilder.ToString();
 }
<div> protected string GetJsonObject<T>(T obj)
 {
 PropertyInfo[] properties = typeof(T).GetProperties();
 StringBuilder jsonBuilder = new StringBuilder();
 jsonBuilder.Append("{");
 bool firstTime = true;
 foreach (PropertyInfo property in properties)
 {
 if (!firstTime)
 {
 jsonBuilder.Append(",");
 }
<div> string name = property.Name;
 object value = property.GetValue(obj, null);
 jsonBuilder.Append("\"" + name + "\":\"" + value.ToString() + "\"");
 firstTime = false;
 }
 jsonBuilder.Append("}");
 return jsonBuilder.ToString();
 }
<div> public bool IsReusable
 {
 get
 {
 return false;
 }
 }
 }
}
<div></div>
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