arcgis api for js入门开发系列十九图层在线编辑

前言

关于本篇功能实现用到的 api 涉及类看不懂的，请参照 esri 官网的 arcgis api 3.x for js：esri 官网 api，里面详细的介绍 arcgis api 3.x 各个类的介绍，还有就是在线例子：esri 官网在线例子，这个也是学习 arcgis api 3.x 的好素材。

本篇主要讲述的是利用 arcgis api 3.x 实现图层在线编辑功能模块，效果图如下：

实现思路

• arcgis serve r发布的 FeatureServer 服务提供的图层在线编辑能力
  
• 实现的在线编辑（增删改），主要是通过前端 ajax 请求后台 FeatureServer 服务来实现的

1. http://120.199.78.138:6080/arcgis/rest/services/dlsde/FeatureServer/0/updateFeatures

public void ProcessRequest (HttpContext context) {
string featureserverurl = context.Request.Params["featureserverurl"];
string features = context.Request.Params["features"];
string param = "features=" + features + "&f=json";
string url = featureserverurl + "/updateFeatures";
string ret = PostDataToUrl(param, url, "application/x-www-form-urlencoded");

context.Response.Write(ret);
}

1. http://120.199.78.138:6080/arcgis/rest/services/dlsde/FeatureServer/0/addFeatures

public void ProcessRequest (HttpContext context) {
string featureserverurl = context.Request.Params["featureserverurl"];
string features = context.Request.Params["features"];
string param = "features=" + features + "&f=json";
string url = featureserverurl + "/addFeatures";
string ret = PostDataToUrl(param, url, "application/x-www-form-urlencoded");

context.Response.Write(ret);
}

1. http://120.199.78.138:6080/arcgis/rest/services/dlsde/FeatureServer/0/deleteFeatures

public void ProcessRequest (HttpContext context) {
string featureserverurl = context.Request.Params["featureserverurl"];
string id = context.Request.Params["OBJECTID"];
string param = "where=OBJECTID=" + id + "&f=json";
string url = featureserverurl + "/deleteFeatures";
string ret = PostDataToUrl(param, url, "application/x-www-form-urlencoded");

context.Response.Write(ret);
context.Response.End();
}

• 前端 ajax 请求

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