C# 经纬度格式化输入控件的简单实现(附html、Qt实现)

一、简述

记--C# 经纬度格式化输入控件的简单实现，方便用户输入。简单实现，待优化。

主要思路是监听用户的每次输入，删除就往光标后补上默认的格式，输入就将光标后面一个字符删除。

例子打包：外链:https://wwa.lanzoui.com/b0c9iuyba 密码:c34t

二、效果

三、工程结构

四、代码

Form1.cs文件

using System;
using System.Windows.Forms;namespace LonLatInput
{public partial class Form1 : Form{public Form1(){InitializeComponent();this.Text = "经纬度格式化输入控件测试";textBoxLon.Text = "123:45:12.98754E";textBoxLon.MaxLength = textBoxLon.Text.Length + 1;textBoxLat.Text = "11:45:12.98754N";textBoxLat.MaxLength = textBoxLon.Text.Length + 1;}private void textBoxLon_TextChanged(object sender, EventArgs e){TextBox textbox = (TextBox)(sender);if (0 >= textbox.Text.Length || textbox.Text.Equals("")){textbox.Text = LonLatTools.LON_FORMAT;return;}int start_index = textbox.SelectionStart;textbox.Text = LonLatTools.FormatLon(textbox.Text, ref start_index);textbox.SelectionStart = start_index;}private void textBoxLat_TextChanged(object sender, EventArgs e){TextBox textbox = (TextBox)(sender);if (0 >= textbox.Text.Length || textbox.Text.Equals("")){textbox.Text = LonLatTools.LAT_FORMAT;return;}int start_index = textbox.SelectionStart;textbox.Text = LonLatTools.FormatLat(textbox.Text, ref start_index);textbox.SelectionStart = start_index;}}
}

LonLatFormat.cs文件

using System;namespace LonLatInput
{enum eType{Longitude = 0,Latitude = 1};class LonLatTools{public const string LON_FORMAT = "000:00:00.00000E";public const string LAT_FORMAT = "00:00:00.00000N";/// <summary>/// 判断是否是0-9数字/// </summary>/// <param name="num"></param>/// <returns></returns>public static bool IsANumber(char num){if ('0' <= num && '9' >= num){return true;}return false;}/// <summary>/// 检查经纬度范围/// </summary>/// <param name="lonlat"></param>/// <param name="type"></param>/// <returns></returns>public static bool CheckLonLat(string lonlat, eType type){if (null == lonlat){return false;}string[] str_arr = lonlat.Split(new char[] { ':', '.', 'E', 'e', 'W', 'w', 'N', 'n', 'S', 's' });if (4 > str_arr.Length){return false;}double dd = Convert.ToDouble(str_arr[0]);double mm = Convert.ToDouble(str_arr[1]);double ss = Convert.ToDouble(str_arr[2]);double sssss = Convert.ToDouble(str_arr[3]);double degree = (dd * 60 * 60 + mm * 60 + ss) * 10000 + sssss;if (eType.Longitude == type){if (degree > (180.0 * 60 * 60 * 10000)){return false;}}else{if (degree > (90.0 * 60 * 60 * 10000)){return false;}}return true;}/// <summary>/// 格式化经度/// </summary>/// <param name="lon"></param>/// <param name="start_index"></param>/// <returns></returns>public static string FormatLon(string lon, ref int start_index){if (0 >= lon.Length || lon.Equals("")){start_index = lon.Length - 1;return LON_FORMAT;}else if (lon.Length > LON_FORMAT.Length){int index = start_index - 1;//输入：将光标后面的字符删除char add_ch = lon[index];char old_ch = '0';//超限后用来恢复原来的值，表现出用户不能输入超限值lon = lon.Remove(index, 1);//先将输入的字符删除，再执行替换操作char[] value_arr = lon.ToCharArray();bool is_change = false;switch (index){//数字类直接替换case 0:case 1:case 2:case 5:case 8:case 10:case 11:case 12:case 13:case 14:if (IsANumber(add_ch)){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 4:case 7://0-5if ('0' <= add_ch && '5' >= add_ch){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 3:case 6:if (':' == add_ch){value_arr[index] = add_ch;is_change = true;}else if ('0' <= add_ch && '5' >= add_ch){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 9:if ('.' == add_ch){value_arr[index] = add_ch;is_change = true;}else if (IsANumber(add_ch)){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 15:if (0 > "[EeWw]".IndexOf(add_ch)){//经纬度需以EeWw结尾value_arr[index] = 'E';}else{value_arr[index] = add_ch;}is_change = true;break;}string new_value = new string(value_arr);//输入无效将光标回退if (!is_change){start_index--;}else{//判断范围是否合法，超限就撤回                    if (!CheckLonLat(new_value, eType.Longitude)){value_arr[index] = old_ch;new_value = new string(value_arr);start_index--;}}lon = new_value;}else if (lon.Length < LON_FORMAT.Length){//删除：在光标后面补默认值lon = lon.Substring(0, start_index)+ LON_FORMAT.Substring(start_index, (LON_FORMAT.Length - lon.Length))+ lon.Substring(start_index);}return lon;}/// <summary>/// 格式化纬度/// </summary>/// <param name="lat"></param>/// <param name="start_index"></param>/// <returns></returns>public static string FormatLat(string lat, ref int start_index){if (0 >= lat.Length || lat.Equals("")){start_index = lat.Length - 1;return LAT_FORMAT;}else if (lat.Length > LAT_FORMAT.Length){int index = start_index - 1;//输入：将光标后面的字符删除char add_ch = lat[index];char old_ch = '0';//超限后用来恢复原来的值，表现出用户不能输入超限值lat = lat.Remove(index, 1);//先将输入的字符删除，再执行替换操作char[] value_arr = lat.ToCharArray();bool is_change = false;switch (index){//数字类直接替换case 0:case 1:case 4:case 7:case 9:case 10:case 11:case 12:case 13:if (IsANumber(add_ch)){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 3:case 6://0-5if ('0' <= add_ch && '5' >= add_ch){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 2:case 5:if (':' == add_ch){value_arr[index] = add_ch;is_change = true;}else if ('0' <= add_ch && '5' >= add_ch){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 8:if ('.' == add_ch){value_arr[index] = add_ch;is_change = true;}else if (IsANumber(add_ch)){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 14:if (0 > "[NnSs]".IndexOf(add_ch)){//经纬度需以EeWw结尾value_arr[index] = 'N';}else{value_arr[index] = add_ch;}is_change = true;break;}string new_value = new string(value_arr);//输入无效将光标回退if (!is_change){start_index--;}else{//判断范围是否合法，超限就撤回                    if (!CheckLonLat(new_value, eType.Latitude)){value_arr[index] = old_ch;new_value = new string(value_arr);start_index--;}}lat = new_value;}else if (lat.Length < LAT_FORMAT.Length){//删除：在光标后面补默认值lat = lat.Substring(0, start_index)+ LAT_FORMAT.Substring(start_index, (LAT_FORMAT.Length - lat.Length))+ lat.Substring(start_index);}return lat;}}
}

五、总结

1、待考虑选中字符输入的情况，粘贴情况。

2、简单实现，待优化。

六、附加

1、html实现

测试代码：

<!DOCTYPE html>
<html><head><title>经纬度格式化输入控件测试</title></head><body>经度: <input type="text" id="lon_id" placeholder="000:00:00.00000E" value="000:00:00.00000E" maxlength="17" oninput="FormatLongitude('lon_id')"/></br>纬度: <input type="text" id="lat_id" placeholder="00:00:00.00000N" value="00:00:00.00000N" maxlength="16" oninput="FormatLatitude('lat_id')"/><script>function IsANumber(num) { /* 判断num是不是0~9之间的数字 */if (undefined == num || null == num || "" == num) {return false;}if (0 <= num && 9 >= num) {return true;}return false;}function CheckLonLat(lonlat, type) {var str_arr = lonlat.split(/[:.]/);if (4 > str_arr.length) {return false;}var dd = parseFloat(str_arr[0]);var mm = parseFloat(str_arr[1]);var ss = parseFloat(str_arr[2]);var sssss = parseFloat(str_arr[3]);var degree = (dd * 60 * 60 + mm * 60 + ss) *10000 + sssss;if ("lon" == type) {if (degree > (180.0 * 60 * 60 * 10000)){return false;}} else {if (degree > (90.0 * 60 * 60 * 10000)){return false;}}return true;}function FormatLongitude(id) {var format = "000:00:00.00000E";var input_obj = document.getElementById(id);var value = input_obj.value;var start_index = input_obj.selectionStart;if (0 >= value.length) { /* 为空就默认为初始状态 */value = format;} else if (value.length > format.length) {  /* 输入：将光标后面一个字符删除 */var index = start_index - 1;var add_ch = value.charAt(index);var value_arr = value.split(""); /*字符串转数组*/value_arr.splice(index, 1);/* 将新添加的字符去掉，后面使用add_ch替换光标后的字符*/var is_change = false;switch (index){//数字类直接替换case 0:case 1:case 2:                                            case 5:                    case 8:case 10:case 11:case 12:case 13:case 14:if (IsANumber(add_ch)){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}                        break;case 4:case 7://0-5if ('0' <= add_ch && '5' >= add_ch){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 3:case 6:if (':' == add_ch){value_arr[index] = add_ch;is_change = true;}else if ('0' <= add_ch && '5' >= add_ch){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 9:if ('.' == add_ch){value_arr[index] = add_ch;is_change = true;}else if (IsANumber(add_ch)){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 15:if (0 > "EeWw".indexOf(add_ch)) {//经纬度需以EeWw结尾value_arr[index] = 'E';}else{                           value_arr[index] = add_ch;}is_change = true;break;}value = value_arr.join("");/*新字符串拼接*///输入无效将光标回退if (!is_change) {start_index--;} else {//判断范围是否合法，超限就撤回                    if (!CheckLonLat(value, "lon")){value_arr[index] = old_ch;value = value_arr.join("");/*新字符串拼接*/start_index--;}}                    } else if (value.length < format.length) { /* 删除：在光标补上默认值 */value = value.substring(0, start_index) + format.substr(start_index, format.length-value.length) + value.substring(start_index);                   }input_obj.value = value;  /*设置新值*/input_obj.setSelectionRange(start_index, start_index);/*设置光标位置*/return value;}function FormatLatitude(id) {var format = "00:00:00.00000N";var input_obj = document.getElementById(id);var value = input_obj.value;var start_index = input_obj.selectionStart;if (0 >= value.length) { /* 为空就默认为初始状态 */value = format;} else if (value.length > format.length) {   /* 输入：将光标后面一个字符删除 */var index = start_index - 1;var add_ch = value.charAt(index);var value_arr = value.split(""); /*字符串转数组*/value_arr.splice(index, 1);/* 将新添加的字符去掉，后面使用add_ch替换光标后的字符*/var is_change = false;switch (index){//数字类直接替换case 0:case 1:case 4:case 7:case 9:case 10:case 11:case 12:case 13:if (IsANumber(add_ch)){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 3:case 6://0-5if ('0' <= add_ch && '5' >= add_ch){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 2:case 5:if (':' == add_ch){value_arr[index] = add_ch;is_change = true;}else if ('0' <= add_ch && '5' >= add_ch){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 8:if ('.' == add_ch){value_arr[index] = add_ch;is_change = true;}else if (IsANumber(add_ch)){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 14:if (0 > "[NnSs]".indexOf(add_ch)){//经纬度需以EeWw结尾value_arr[index] = 'N';}else{value_arr[index] = add_ch;}is_change = true;break;}value = value_arr.join("");/*新字符串拼接*///输入无效将光标回退if (!is_change) {start_index--;} else {//判断范围是否合法，超限就撤回                    if (!CheckLonLat(value, "lat")){value_arr[index] = old_ch;value = value_arr.join("");/*新字符串拼接*/start_index--;}}                  } else if (value.length < format.length) { /* 删除：在光标补上默认值 */value = value.substring(0, start_index) + format.substr(start_index, format.length-value.length) + value.substring(start_index);                   }input_obj.value = value;  /*设置新值*/input_obj.setSelectionRange(start_index, start_index);/*设置光标位置*/return value;}</script></body>
</html>

2、Qt实现

测试主要代码:lonlathelper.cpp

#include "lonlathelper.h"bool IsANumber(char num)
{if ('0' <= num && '9' >= num) {return true;}return false;
}bool CheckLonLat(QString lonlat, eType type)
{QStringList str_arr = lonlat.split(QRegExp("[:.]"));if (4 > str_arr.count()) {return false;}double dd = str_arr[0].toDouble();double mm = str_arr[1].toDouble();double ss = str_arr[2].toDouble();double sssss = str_arr[3].toDouble();double degree = (dd * 60 * 60 + mm * 60 + ss) *10000 + sssss;if (Longitude == type) {if (degree > (180.0 * 60 * 60 * 10000)){return false;}} else {if (degree > (90.0 * 60 * 60 * 10000)){return false;}}return true;
}LonLatHelper::LonLatHelper()
{}QString LonLatHelper::FormatLon(QString lon, int &start_index)
{if (0 >= lon.length()){start_index = lon.length() - 1;return QString(LON_FORMAT);}else if (lon.length() > (int)strlen(LON_FORMAT)){int index = start_index - 1;//输入：将光标后面的字符删除char add_ch = lon.at(index).toLatin1();char old_ch = '0';//超限后用来恢复原来的值，表现出用户不能输入超限值lon = lon.remove(index, 1);//先将输入的字符删除，再执行替换操作QByteArray value_arr = lon.toLocal8Bit();bool is_change = false;switch (index){//数字类直接替换case 0:case 1:case 2:case 5:case 8:case 10:case 11:case 12:case 13:case 14:if (IsANumber(add_ch)){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 4:case 7://0-5if ('0' <= add_ch && '5' >= add_ch){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 3:case 6:if (':' == add_ch){value_arr[index] = add_ch;is_change = true;}else if ('0' <= add_ch && '5' >= add_ch){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 9:if ('.' == add_ch){value_arr[index] = add_ch;is_change = true;}else if (IsANumber(add_ch)){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 15:if (0 > QString("[EeWw]").indexOf(add_ch)){//经纬度需以EeWw结尾value_arr[index] = 'E';}else{value_arr[index] = add_ch;}is_change = true;break;}QString new_value = QString(value_arr);//输入无效将光标回退if (!is_change){start_index--;}else{//判断范围是否合法，超限就撤回if (!CheckLonLat(new_value, Longitude)){value_arr[index] = old_ch;new_value = QString(value_arr);start_index--;}}lon = new_value;}else if (lon.length() < (int)strlen(LON_FORMAT)){//删除：在光标后面补默认值lon = lon.left(start_index)+ QString(LON_FORMAT).mid(start_index, (strlen(LON_FORMAT) - lon.length()))+ lon.right(lon.length()-start_index);}return lon;
}QString LonLatHelper::FormatLat(QString lat, int &start_index)
{if (0 >= lat.length()){start_index = lat.length() - 1;return QString(LAT_FORMAT);}else if (lat.length() > (int)strlen(LAT_FORMAT)){int index = start_index - 1;//输入：将光标后面的字符删除char add_ch = lat.at(index).toLatin1();char old_ch = '0';//超限后用来恢复原来的值，表现出用户不能输入超限值lat = lat.remove(index, 1);//先将输入的字符删除，再执行替换操作QByteArray value_arr = lat.toLocal8Bit();bool is_change = false;switch (index){//数字类直接替换case 0:case 1:case 4:case 7:case 9:case 10:case 11:case 12:case 13:if (IsANumber(add_ch)){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 3:case 6://0-5if ('0' <= add_ch && '5' >= add_ch){old_ch = value_arr[index];value_arr[index] = add_ch;is_change = true;}break;case 2:case 5:if (':' == add_ch){value_arr[index] = add_ch;is_change = true;}else if ('0' <= add_ch && '5' >= add_ch){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 8:if ('.' == add_ch){value_arr[index] = add_ch;is_change = true;}else if (IsANumber(add_ch)){index++;old_ch = value_arr[index];value_arr[index] = add_ch;start_index++;is_change = true;}break;case 14:if (0 > QString("[NnSs]").indexOf(add_ch)){//经纬度需以EeWw结尾value_arr[index] = 'N';}else{value_arr[index] = add_ch;}is_change = true;break;}QString new_value = QString(value_arr);//输入无效将光标回退，表现出来就是非法字符不能输入if (!is_change){start_index--;}else{//判断范围是否合法，超限就撤回，表现出来就是超限不能输入if (!CheckLonLat(new_value, Latitude)){value_arr[index] = old_ch;new_value = QString(value_arr);start_index--;}}lat = new_value;}else if (lat.length() < (int)strlen(LAT_FORMAT)){//删除：在光标后面补默认值lat = lat.left(start_index)+ QString(LAT_FORMAT).mid(start_index, (strlen(LAT_FORMAT) - lat.length()))+ lat.right(lat.length()-start_index);}return lat;
}

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