02【ArcGIS Pro SDK for Microsoft .NET】开发实现登录页面

写在前面

前一篇文章介绍了ArcGIS Pro SDK for Microsoft .NET开发环境的搭建，并且在文章最后我们创建了一个demo并让它成功运行。这一篇文章我们介绍下如何在前面创建的demo基础之上增加一个登录页面。

操作步骤

1、打开上一节创建的demo代码，然后在"UI"文件夹上面鼠标右击，依次选择【添加 | 新建项】，在打开的新建项窗口选择新建一个WPF的窗口，并为其取名为"Login"，如下图所示：

 

2、新建Login窗口之后，我们的右侧项目代码UI目录下会出现新建的Login窗口代码文件，如下所示：

 

3、鼠标双击新建的Login窗口代码文件，然后在左侧的设计窗口将【工具栏】中的Label、Button、TextBox控件拖动至Login的设计器面板，最终形成如下所示的一个窗体：

 

4、然后鼠标依次点击此页面中的登录和取消两个按钮，在右下方的属性面板中给这两个分别设置名称，如下：

 

 

5、在设计器面板分别鼠标双击登录和取消按钮，分别为这两个按钮绑定点击事件，在这里就做一些简单的操作，点击登录按钮时不进行登录校验，只需要打开后续的面板即可，点击取消按钮时就让系统退出，代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace ProConfigurationdemo2.UI
{
    /// <summary>
    /// Login.xaml 的交互逻辑
    /// </summary>
    public partial class Login : Window
    {
        public Login()
        {
            InitializeComponent();
        }

        private void login_btn_Click(object sender, RoutedEventArgs e)
        {
            //实现登录验证相关的代码
            this.DialogResult = true;
        }

        private void login_cance_btn_Click(object sender, RoutedEventArgs e)
        {
            //取消登录
            this.DialogResult = false;
        }
    }
}

6、然后在代码目录结构中双击UI目录下的SplashScreen.xaml文件，打开此页面的设计器面板，这个面板默认会展示我们的项目名称，我们在这里将展示的文字修改成我们系统的名称，如下：

 

 

7、双击代码目录中的ConfigurationManager1.cs代码文件，然后在此代码文件中新建ConfigurationManager1构造函数，并且在构造函数中实例化我们之前新建的Login面板，这样一来，我们项目启动时会首先打开新建的登录面板，然后只有我们点击登录时才会真正进入系统，如下：

using ArcGIS.Core.CIM;
using ArcGIS.Core.Data;
using ArcGIS.Core.Geometry;
using ArcGIS.Desktop.Catalog;
using ArcGIS.Desktop.Core;
using ArcGIS.Desktop.Editing;
using ArcGIS.Desktop.Extensions;
using ArcGIS.Desktop.Framework;
using ArcGIS.Desktop.Framework.Contracts;
using ArcGIS.Desktop.Framework.Dialogs;
using ArcGIS.Desktop.Framework.Threading.Tasks;
using ArcGIS.Desktop.Mapping;
using ProConfigurationdemo2.UI;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;



namespace ProConfigurationdemo2
{
    internal class ConfigurationManager1 : ConfigurationManager
    {

        public ConfigurationManager1()
        {
            //启用login页面
            //只有在调用Application对象的Shutdown方法时，应用程序才会关闭
            System.Windows.Application.Current.ShutdownMode = System.Windows.ShutdownMode.OnExplicitShutdown;
            Login login = new Login();
            if((bool)login.ShowDialog())
            {
                login.Close();
            }
            else
            {
                Environment.Exit(0);
            }
        }


        /// <summary>
        /// Replaces the default ArcGIS Pro application name
        /// </summary>
        protected override string ApplicationName
        {
            get { return "ProConfigurationdemo2"; }
        }

        /// <summary>
        /// Replaces the ArcGIS Pro Main window icon.
        /// </summary>
        protected override ImageSource Icon
        {
            get
            {
                return new BitmapImage(new Uri(@"pack://application:,,,/ProConfigurationdemo2;component/Images/favicon.ico"));
            }
        }

        #region Override Startup Page

        private StartPageViewModel _vm;
        /// <summary>
        /// Called before ArcGIS Pro starts up. Replaces the default Pro start-up page (Optional)
        /// </summary>
        /// <returns> Implemented UserControl with start-up page functionality. 
        /// Return null if a custom start-up page is not needed. Default ArcGIS Pro start-up page will be displayed.</returns>
        protected override System.Windows.FrameworkElement OnShowStartPage()
        {
            if (_vm == null)
            {
                _vm = new StartPageViewModel();
            }
            var page = new StartPage();
            page.DataContext = _vm;
            return page;
        }

        ///<summary>
        ///During the start up this method is called after it is safe to access Portal and use ArcGIS.Desktop.Core. 
        ///ArcGIS Pro Theme has already been set. 
        ///</summary>
        ///<param name="cancelEventArgs">
        ///To cancel initialization, set the cancelEventArgs.Cancel property to true.
        ///</param>
        protected override void OnApplicationInitializing(CancelEventArgs cancelEventArgs)
        {

        }

        ///<summary>
        ///During the start up this method is called after the Application Window Start page is ready. From here on calls to ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask are safe.
        ///ArcGIS Pro Extension modules can now be accessed. 
        ///</summary>
        protected override void OnApplicationReady()
        {

        }

        #endregion

        #region Override Splash screen
        /// <summary>
        /// Called while ArcGIS Pro starts up. Replaces the default Pro splash screen. (Optional)
        /// </summary>
        /// <returns>Implemented Window with splash screen functionality. 
        /// Return null if a custom splash screen is not needed. Default ArcGIS Pro splash screen will be displayed.</returns>
        protected override System.Windows.Window OnShowSplashScreen()
        {
            return new SplashScreen();
        }
        #endregion

        #region Override About page
        /// <summary>
        /// Customized UserControl is displayed in ArcGIS Pro About property page. Allows to add information about this specific managed configuration.
        /// </summary>
        /// <returns>Implemented UserControl with about box information. 
        /// Return null if a custom about box is not needed. Default ArcGIS Pro About box will be displayed.</returns>
        protected override System.Windows.FrameworkElement OnShowAboutPage()
        {
            return new AboutPage();
        }
        #endregion
    }
}

8、此时我们启动项目，发现系统首先进入登录面板，然后我们点击登录按钮时，才会出现之前我们创建的demo系统界面，如下所示：

 

 

 

9、至此，我们的登陆界面定制开发完成。当然，我们在此处仅仅是介绍了如何新建一个登录页面，并将其注册为系统起始页的方法，里面的逻辑代码并没有详细的编写，大家在实际项目中自己编写登录页面的逻辑代码即可。