如何利用arcgis api for javascript在graphicslayer绘制点线面

Posted 2023-05-05

参考技术A 建议你查看arcgis api for javascript官网，有详细的例子可以查看：
http://jshelp.thinkgis.cn/jssamples/toolbar_edit.html

arcgis api for js入门开发系列十九图层在线编辑

实现思路：arcgis server发布的FeatureServer服务提供的图层在线编辑能力以及前端ajax请求后台FeatureServer服务来实现的

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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