csharp: WebBrowser read baidumap
setpoint.html:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>行政区域工具</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.4"></script>
</head>
<body>
<div style="width:520px;height:340px;border:1px solid gray" id="container"></div>
<p><input id="startBtn" type="button" onclick="startTool();" value="开启取点工具" /><input type="button" onclick="map.clearOverlays();document.getElementById('info').innerHTML = '';points=[];" value="清除" /></p>
<div id="info"></div>
<div id="lng"></div>
<div id="lat"></div>
</body>
</html>
<script type="text/javascript">
var map = new BMap.Map("container"); // 创建Map实例
map.centerAndZoom("北京", 11); // 初始化地图,设置中心点坐标和地图级别
map.addControl(new BMap.NavigationControl());
map.addControl(new BMap.ScaleControl()); var key = 1; //开关
var newpoint; //一个经纬度
var points = []; //数组，放经纬度信息
var polyline = new BMap.Polyline(); //折线覆盖物 function startTool(){ //开关函数
if(key==1){
document.getElementById("startBtn").style.background = "green";
document.getElementById("startBtn").style.color = "white";
document.getElementById("startBtn").value = "开启状态";
key=0;
}
else{
document.getElementById("startBtn").style.background = "red";
document.getElementById("startBtn").value = "关闭状态";
key=1;
}
}
map.addEventListener("click",function(e){ //单击地图，形成折线覆盖物
newpoint = new BMap.Point(e.point.lng,e.point.lat);
if(key==0){
// if(points[points.length].lng==points[points.length-1].lng){alert(111);}
points.push(newpoint); //将新增的点放到数组中
polyline.setPath(points); //设置折线的点数组
map.addOverlay(polyline); //将折线添加到地图上
document.getElementById("info").innerHTML += "new BMap.Point(" + e.point.lng + "," + e.point.lat + "),</br>"; //输出数组里的经纬度
document.getElementById("lng").innerHTML= e.point.lng;
document.getElementById("lat").innerHTML= e.point.lat;
}
});
map.addEventListener("dblclick",function(e){ //双击地图，形成多边形覆盖物
if(key==0){
map.disableDoubleClickZoom(); //关闭双击放大
var polygon = new BMap.Polygon(points);
map.addOverlay(polygon); //将折线添加到地图上
}
});
</script>
用Winform 读取百度地图的经纬度：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Security.Permissions; namespace baidudemo
{ [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
[System.Runtime.InteropServices.ComVisibleAttribute(true)]
public partial class Form2 : Form
{ /// <summary>
///
/// </summary>
public Form2()
{
InitializeComponent();
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form2_Load(object sender, EventArgs e)
{
string str_url = Application.StartupPath + "\\baidu\\setpoint.html";
Uri url = new Uri(str_url);
webBrowser1.Url = url;
webBrowser1.ObjectForScripting = this; }
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{ }
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
string tag_lng = webBrowser1.Document.GetElementById("lng").InnerText;
string tag_lat = webBrowser1.Document.GetElementById("lat").InnerText;
this.textBox1.Text = tag_lat;
this.textBox2.Text = tag_lng;
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void webBrowser1_LocationChanged(object sender, EventArgs e)
{
;
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Web;
using System.Web.Script.Serialization; //引用System.Web.Extensions
using System.Data;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Runtime.Serialization.Formatters;
/// <summary>
///
/// </summary>
public class JsonHelper
{
//对应JSON的singleInfo成员
public string singleInfo = string.Empty; protected string _error = string.Empty;
protected bool _success = true;
protected long _totalCount = 0;
protected System.Collections.ArrayList arrData = new ArrayList();
protected System.Collections.ArrayList arrDataItem = new ArrayList(); public JsonHelper()
{
//
//TODO: 在此处添加构造函数逻辑
//
} //对应于JSON的success成员
public bool success
{
get
{
return _success;
}
set
{
//如设置为true则清空error
if (success) _error = string.Empty;
_success = value;
}
} //对应于JSON的error成员
public string error
{
get
{
return _error;
}
set
{
//如设置error，则自动设置success为false
if (value != "") _success = false;
_error = value;
}
} public long totlalCount
{
get { return _totalCount; }
set { _totalCount = value; }
} //重置，每次新生成一个json对象时必须执行该方法
public void Reset()
{
_success = true;
_error = string.Empty;
singleInfo = string.Empty;
arrData.Clear();
arrDataItem.Clear();
} public void AddItem(string name, string value)
{
arrData.Add("/" + name + "/:" + "/" + value + "/");
} public void ItemOk()
{
arrData.Add("<BR>");
//返回总记录条数
totlalCount++;
} //序列化JSON对象，得到返回的JSON代码
public override string ToString()
{
StringBuilder sb = new StringBuilder();
sb.Append("{");
sb.Append("/totalCount/:/" + _totalCount.ToString() + "/,");
sb.Append("/success/:" + _success.ToString().ToLower() + "/,");
sb.Append("/error/:/" + _error.Replace("/", "///") + "/,");
sb.Append("/data/:/["); int index = 0;
sb.Append("{");
if (arrData.Count <= 0)
{
sb.Append("}");
}
else
{
foreach (string val in arrData)
{
index++; if (val != "<BR>")
{
sb.Append(val + ",");
}
else
{
sb = sb.Replace(",", "", sb.Length - 1, 1);
sb.Append("},");
if (index < arrData.Count)
{
sb.Append("{");
}
} }
sb = sb.Replace(",", "", sb.Length - 1, 1);
sb.Append("]");
} sb.Append("}");
return sb.ToString();
} public string ToSingleString()
{
StringBuilder sb = new StringBuilder();
sb.Append("{"); sb.Append("success:" + _success.ToString().ToLower() + ","); sb.Append("data:"); int index = 0;
sb.Append("{");
if (arrData.Count <= 0)
{
sb.Append("}");
}
else
{
foreach (string val in arrData)
{
index++; if (val != "<BR>")
{
sb.Append(val + ",");
}
else
{
sb = sb.Replace(",", "", sb.Length - 1, 1);
sb.Append("},");
if (index < arrData.Count)
{
sb.Append("{");
}
} }
sb = sb.Replace(",", "", sb.Length - 1, 1);
sb.Append("");
} sb.Append("}");
return sb.ToString();
} public static string ObjectToJSON(object obj)
{
JavaScriptSerializer jss =new JavaScriptSerializer();
try
{
return jss.Serialize(obj);
}
catch(Exception ex)
{
throw new Exception("JSONHelper.ObjectToJSON(): "+ ex.Message);
}
}
public static List<Dictionary<string,object>>DataTableToList(DataTable dt)
{
List<Dictionary<string,object>> list=new List<Dictionary<string,object>>();
foreach(DataRow dr in dt.Rows)
{
Dictionary<string,object> dic =new Dictionary<string,object>();
foreach(DataColumn dc in dt.Columns)
{
dic.Add(dc.ColumnName, dr[dc.ColumnName]);
}
list.Add(dic);
} return list;
}
/// <summary>
///
/// </summary>
/// <param name="ds"></param>
/// <returns></returns>
public static Dictionary<string,List<Dictionary<string,object>>>DataSetToDic(DataSet ds)
{
Dictionary<string,List<Dictionary<string,object>>> result =new Dictionary<string,List<Dictionary<string,object>>>();
foreach(DataTable dt in ds.Tables)
result.Add(dt.TableName,DataTableToList(dt));
return result;
}
/// <summary>
///
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string DataTableToJSON(DataTable dt)
{
return ObjectToJSON(DataTableToList(dt));
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonText"></param>
/// <returns></returns>
public static T JSONToObject<T>(string jsonText)
{
JavaScriptSerializer jss =new JavaScriptSerializer();
try
{
return jss.Deserialize<T>(jsonText);
}
catch(Exception ex)
{
throw new Exception("JSONHelper.JSONToObject(): "+ ex.Message);
}
}
/// <summary>
///
/// </summary>
/// <param name="jsonText"></param>
/// <returns></returns>
public static Dictionary<string,List<Dictionary<string,object>>>TablesDataFromJSON(string jsonText)
{
return JSONToObject<Dictionary<string,List<Dictionary<string,object>>>>(jsonText);
}
/// <summary>
///
/// </summary>
/// <param name="jsonText"></param>
/// <returns></returns>
public static Dictionary<string,object>DataRowFromJSON(string jsonText)
{
return JSONToObject<Dictionary<string,object>>(jsonText);
} public static string ToJsJson(object item)//参数要装换成JSON的对象
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(item.GetType());
using(MemoryStream ms=new MemoryStream())
{
serializer.WriteObject(ms, item);
StringBuilder sb = new StringBuilder();
sb.Append(Encoding.UTF8.GetString(ms.ToArray()));
return sb.ToString();
}
} //反序列化
//T指定要序列化的对象,jsonString是JSON字符串变量
public static T FromJsonTo<T>(string jsonString)
{
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)))
{
T jsonObject = (T)ser.ReadObject(ms);
return jsonObject;
}
}
}
/// <summary>
/// 提供 Http 相关方法。
/// </summary>
public class HttpUtils
{ /// <summary>
/// 执行HTTP GET请求。
/// </summary>
/// <param name="url">请求地址</param>
/// <param name="parameters">请求参数</param>
/// <returns>HTTP响应</returns>
public static string DoGet(string url, IDictionary<string, string> parameters)
{
if (parameters != null && parameters.Count > 0)
{
if (url.Contains("?"))
{
url = url + "&" + BuildPostData(parameters);
}
else
{
url = url + "?" + BuildPostData(parameters);
}
} HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.ServicePoint.Expect100Continue = false;
req.Method = "GET";
req.KeepAlive = true;
req.UserAgent = "Test";
req.ContentType = "application/x-www-form-urlencoded;charset=utf-8"; HttpWebResponse rsp = null;
try
{
rsp = (HttpWebResponse)req.GetResponse();
}
catch (WebException webEx)
{
if (webEx.Status == WebExceptionStatus.Timeout)
{
rsp = null;
}
} if (rsp != null)
{
if (rsp.CharacterSet != null)
{
Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
return GetResponseAsString(rsp, encoding);
}
else
{
return string.Empty;
}
}
else
{
return string.Empty;
}
} /// <summary>
/// 把响应流转换为文本。
/// </summary>
/// <param name="rsp">响应流对象</param>
/// <param name="encoding">编码方式</param>
/// <returns>响应文本</returns>
private static string GetResponseAsString(HttpWebResponse rsp, Encoding encoding)
{
StringBuilder result = new StringBuilder();
Stream stream = null;
StreamReader reader = null; try
{
// 以字符流的方式读取HTTP响应
stream = rsp.GetResponseStream();
reader = new StreamReader(stream, encoding); // 每次读取不大于256个字符，并写入字符串
char[] buffer = new char[256];
int readBytes = 0;
while ((readBytes = reader.Read(buffer, 0, buffer.Length)) > 0)
{
result.Append(buffer, 0, readBytes);
}
}
catch (WebException webEx)
{
if (webEx.Status == WebExceptionStatus.Timeout)
{
result = new StringBuilder();
}
}
finally
{
// 释放资源
if (reader != null) reader.Close();
if (stream != null) stream.Close();
if (rsp != null) rsp.Close();
} return result.ToString();
} /// <summary>
/// 组装普通文本请求参数。
/// </summary>
/// <param name="parameters">Key-Value形式请求参数字典。</param>
/// <returns>URL编码后的请求数据。</returns>
private static string BuildPostData(IDictionary<string, string> parameters)
{
StringBuilder postData = new StringBuilder();
bool hasParam = false; IEnumerator<KeyValuePair<string, string>> dem = parameters.GetEnumerator();
while (dem.MoveNext())
{
string name = dem.Current.Key;
string value = dem.Current.Value;
// 忽略参数名或参数值为空的参数
if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))
{
if (hasParam)
{
postData.Append("&");
} postData.Append(name);
postData.Append("=");
postData.Append(Uri.EscapeDataString(value));
hasParam = true;
}
} return postData.ToString();
}
/*
GoBack()：后退
GoForward()：前进
Refresh()：刷新
Stop()：停止
GoHome()：浏览主页
WebBrowser控件的常用属性：
Document：获取当前正在浏览的文档
DocumentTitle：获取当前正在浏览的网页标题
StatusText：获取当前状态栏的文本
Url：获取当前正在浏览的网址的Uri
ReadyState：获取浏览的状态
WebBrowser控件的常用事件：
DocumentTitleChanged,
CanGoBackChanged,
CanGoForwardChanged,
DocumentTitleChanged,
ProgressChanged,
ProgressChanged */
/// <summary>
/// 根据Name获取元素
/// </summary>
/// <param name="wb"></param>
/// <param name="Name"></param>
/// <returns></returns>
public HtmlElement GetElement_Name(WebBrowser wb, string Name)
{
HtmlElement e = wb.Document.All[Name];
return e;
} /// <summary>
/// 根据Id获取元素
/// </summary>
/// <param name="wb"></param>
/// <param name="id"></param>
/// <returns></returns>
public HtmlElement GetElement_Id(WebBrowser wb, string id)
{
HtmlElement e = wb.Document.GetElementById(id);
return e;
} /// <summary>
/// 根据Index获取元素
/// </summary>
/// <param name="wb"></param>
/// <param name="index"></param>
/// <returns></returns>
public HtmlElement GetElement_Index(WebBrowser wb, int index)
{
HtmlElement e = wb.Document.All[index];
return e;
} /// <summary>
/// 获取form表单名name,返回表单
/// </summary>
/// <param name="wb"></param>
/// <param name="form_name"></param>
/// <returns></returns>
public HtmlElement GetElement_Form(WebBrowser wb, string form_name)
{
HtmlElement e = wb.Document.Forms[form_name];
return e;
} /// <summary>
/// 设置元素value属性的值
/// </summary>
/// <param name="e"></param>
/// <param name="value"></param>
public void Write_value(HtmlElement e, string value)
{
e.SetAttribute("value", value);
} /// <summary>
/// 执行元素的方法，如：click，submit(需Form表单名)等
/// </summary>
/// <param name="e"></param>
/// <param name="s"></param>
public void Btn_click(HtmlElement e, string s)
{ e.InvokeMember(s);
}
}
工作流程图：
https://jsplumbtoolkit.com/demos/toolkit/flowchart-builder/index.html
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