写在代码之前：

有一条小河，因为怕湿了脚，所以去搭桥。

结果是脚没有湿，却弄脏了全身。

谷歌地图下载器下载的图片四个角点的经纬度坐标为十进制的度，在ArcGIS里做配准，由于图比较大，导出的时候做了分割，

分割成了很多张图片。需要找出其中一张与研究区一致的影像，一个个配准需要输入经纬度，但ArcGIS中输入的是度分秒，

所以，写程序对txt文件进行批量处理。代码如下：

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.IO;

namespace 十进制度转度分秒

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

string folderpath = "";

private void button1_Click(object sender, EventArgs e)

{

FolderBrowserDialog fbd = new FolderBrowserDialog();

fbd.Description = "选择包含谷歌地图下载器经纬度的文件夹";

if (fbd.ShowDialog() == DialogResult.OK)

{

folderpath = fbd.SelectedPath;

}

textBox1.Text = folderpath;

}

private void button2_Click(object sender, EventArgs e)

{

char[] split = new char[] { ':', ',' }; //分割字符串

folderpath = textBox1.Text;

//获取所选文件夹路径下的所有txt文档

List list = new List();

string[] strlist = Directory.GetFiles(folderpath);

for (int i = 0; i < strlist.Length; i++)

{

FileInfo f = new FileInfo(strlist[i]);

if (f.Extension == ".txt")

list.Add(strlist[i]);

}

for (int i = 0; i < list.Count; i++)

{

try

{

StringBuilder sb = new StringBuilder();

StreamReader sr = new StreamReader(list[i],Encoding.GetEncoding(936),true);

string s;

while (!sr.EndOfStream)

{

s = sr.ReadLine();

string[] tempstr = s.Split(split);

if (!tempstr[0].Contains("角"))

{

MessageBox.Show("所选择的不是谷歌地图下载器的坐标文件");

return;

}

else

{

//转换并写入文件

double[] dt1 = trandu2m(tempstr[1]);

double[] dt2 = trandu2m(tempstr[2]);

string s1 = tempstr[0]+dt1[0].ToString()

+ "°" + dt1[1].ToString()+"′"+dt1[2].ToString()+"″";

string s2 = dt2[0].ToString()

+ "°" + dt2[1].ToString() + "′" + dt2[2].ToString() + "″";

sb.AppendLine(s1 + "，" + s2);

}

}

sr.Close();

FileStream fs = new FileStream(list[i], FileMode.Append);

StreamWriter sw = new StreamWriter(fs,Encoding.GetEncoding(936));

sw.WriteLine(); //写入一空行

sw.WriteLine(sb);

sw.Close();

}

catch (System.Exception ex)

{

throw new Exception(ex.Message);

}

}

MessageBox.Show("操作成功");

}

///

/// 十进制度转化为度分秒

///

///

///

private double[] trandu2m(string str)

{

try

{

//double dd = Convert.ToDouble(str);

double[] dt = new double[3];

dt[0] = Convert.ToDouble(str.ToString().Substring(0, str.IndexOf(".")));

string str1= str.Substring(str.IndexOf(".")+1);

str1 = "0." + str1;

string str2 = (Convert.ToDouble(str1) * 60).ToString();

dt[1] = Convert.ToDouble(str2.Substring(0,str2.IndexOf(".")));

string str3 = str2.Substring(str2.IndexOf(".") + 1);

str3 = "0." + str3;

string str4 = (Convert.ToDouble(str3) * 60).ToString();

dt[2] = Convert.ToDouble(str4);

return dt;

}

catch (System.Exception ex)

{

throw new Exception(ex.Message);

}

}

}

}