04-22 12:31 阅读 587

WPF实例系列一：登录、注册界面设计

文章目录

WPF实例系列一：登录、注册界面设计

前言

一、实例演示

1. 登录界面展示

2. 注册界面展示

3. 数据存储

4. 效果演示

二、结构及源码

1.主界面跳转登录界面设计

2.登录界面设计

3.注册界面设计

4.Excel保存数据类设计

5.源码

前言

本实例将展示利用WPF设计登录界面、注册界面，并实现相应的功能，其中账户数据将存储在excel表中。

一、实例演示

1. 登录界面展示

2. 注册界面展示

3. 数据存储

4. 效果演示

二、结构及源码

1.主界面跳转登录界面设计

MainWindow.xaml.cs跳转登录界面代码如下：

using System;

using System.Windows;

using System.Windows.Threading;

namespace sample5

{

/// <summary>

/// MainWindow.xaml 的交互逻辑

/// </summary>

public partial class MainWindow : Window

{

//public int play_state = 1;

public MainWindow()

{

InitializeComponent();

#region 登录界面加载及验证

//显示登陆界面，验证后返回。

LoginWindow loginWindow = new LoginWindow();

loginWindow.ShowDialog();

if (loginWindow.DialogResult != Convert.ToBoolean(1))

{

this.Close();

}

//显示登陆界面结束

#endregion

}

2.登录界面设计

Xaml代码如下（添加1个Nuget库：MaterialDesignThemes.3.1.0-ci981 ；可参考）：

<Window x:Class="sample5.LoginWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:local="clr-namespace:sample5"

mc:Ignorable="d"

Title="用户登录" Height="500" Width="350"

ResizeMode="NoResize"

WindowStartupLocation="CenterScreen"

WindowStyle="None"

MouseLeftButtonDown="MoveWindow_MouseLeftButtonDown"

FontFamily="Segoe UI Emoji">

<Grid>

<Rectangle.Fill>

</LinearGradientBrush>

</Rectangle.Fill>

</Rectangle>

<Rectangle.Fill>

</Rectangle.Fill>

</Rectangle>

<Rectangle.Effect>

</Rectangle.Effect>

</Rectangle>

</StackPanel>

</Grid>

<materialDesign:PackIcon Kind="Close"/>

</Button>

<Border.Background>

</Border.Background>

</Border>

</Grid>

</Window>

后台代码如下（LoginWindow.xaml.cs）：

using System;

using System.Collections;

using System.Windows;

using System.Windows.Input;

using Window = System.Windows.Window;

namespace sample5

{

/// <summary>

/// LoginWindow.xaml 的交互逻辑

/// </summary>

public partial class LoginWindow : Window

{

public string UserName;

public string UserPassword;

public int border = 1;

public static Hashtable userall_harsh;

public LoginWindow()

{

InitializeComponent();

}

private void MoveWindow_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

{

DragMove();

}

private void Close_Click(object sender, RoutedEventArgs e)

{

this.Close();

}

private void Login_Button(object sender, RoutedEventArgs e)

{

ExcelSave excel1 = new ExcelSave();

userall_harsh = excel1.readExcel();

if (userall_harsh == null)

{

MessageBox.Show("无此账户，请先注册!");

return;

}

else

{

IDictionaryEnumerator myEnumerator = userall_harsh.GetEnumerator(); //读取harshtable中的key和value值

while (myEnumerator.MoveNext()) //将枚举数推到集合的下一元素，若为空，则退出循环

{

UserName = myEnumerator.Key.ToString(); //key值赋给UserName

UserPassword = myEnumerator.Value.ToString(); //value值赋给UserPassword

if (Account.Text.ToString() == UserName && Password.Password.ToString() == UserPassword)

{

this.DialogResult = Convert.ToBoolean(1);

this.Close();

break;

}

else if (border<=userall_harsh .Count-1) //给循环一边界，若循环到所存数据最后一个数仍然不正确，则执行else语句

{

border++;

}

else

MessageBox.Show("账号或密码错误，请重试！");

}

//“注册账户”TextBlock触发事件

private void TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

{

RegisterWindow register1 = new RegisterWindow(); //Login为窗口名，把要跳转的新窗口实例化

this.Close(); //关闭当前窗口

register1.ShowDialog(); //打开新窗口

}

3.注册界面设计

Xaml代码如下：

<Window x:Class="sample5.RegisterWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:local="clr-namespace:sample5"

mc:Ignorable="d"

Title="用户登录" Height="500" Width="350"

ResizeMode="NoResize"

WindowStartupLocation="CenterScreen"

WindowStyle="None"

MouseLeftButtonDown="MoveWindow_MouseLeftButtonDown"

FontFamily="Segoe UI Emoji">

<Grid>

<Rectangle.Fill>

</LinearGradientBrush>

</Rectangle.Fill>

</Rectangle>

<Rectangle.Fill>

</Rectangle.Fill>

</Rectangle>

<Rectangle.Effect>

</Rectangle.Effect>

</Rectangle>

</StackPanel>

</Grid>

<Border.Background>

</Border.Background>

</Border>

<materialDesign:PackIcon Kind="Close"/>

</Button>

</Grid>

</Window>

后台代码如下：

using System;

using System.Collections;

using System.Windows;

using System.Windows.Input;

using Window = System.Windows.Window;

namespace sample5

{

/// <summary>

/// RegisterWindow.xaml 的交互逻辑

/// </summary>

public partial class RegisterWindow : Window

{

public static Hashtable userall;

public RegisterWindow()

{

InitializeComponent();

}

private void MoveWindow_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

{

DragMove();

}

private void ReClose_Click(object sender, RoutedEventArgs e)

{

this.Close();

}

private void Register_Button(object sender, RoutedEventArgs e)

{

string u = Re_Account.Text.ToString();

string p = Re_Password.Password.ToString();

string rp = Re_PasswordAgain.Password.ToString();

ExcelSave excel = new ExcelSave();

if (String.IsNullOrEmpty(u))

{

MessageBox.Show("user is not null");

return;

}

if (String.IsNullOrEmpty(p))

{

MessageBox.Show("password is not null");

return;

}

if (String.IsNullOrEmpty(rp))

{

MessageBox.Show("Repassword is not null");

return;

}

if (!p.Equals(rp))

{

MessageBox.Show("password is not equals repassword");

return;

}

userall = excel.readExcel(); //读取excel数据

if (userall == null)

{

userall = new Hashtable();

userall.Add(u, p);

}

else

{

bool isexist = userall.ContainsKey(u); //判断用户是否存在

if (isexist)

{

MessageBox.Show("user is exist!");

return;

}

else

{

userall.Add(u, p);

Console.WriteLine(userall.Count);

}

System.Windows.Application.Current.Properties["users"] = userall; //类似于Session的功能,用户登录后，可以将用户的信息保存在Properties中。

excel.InsertExcel(u, p);

MessageBox.Show("regist success!");

MainWindow main = new MainWindow();

main.WindowStartupLocation = WindowStartupLocation.Manual; //使新窗口位置在原来的位置上

main.Left = this.Left; //使新窗口位置在原来的位置上

main.Top = this.Top; //使新窗口位置在原来的位置上

this.Close();

main.ShowDialog(); //打开新窗口

}

4.Excel保存数据类设计

学习使用Csharp处理excel表，创建ExcelSave.cs：

using System;

using Excel = Microsoft.Office.Interop.Excel;

using System.Collections;

using System.Windows;

namespace sample5

{

public class ExcelSave

{

Excel.Application ExcelApp = new Excel.Application();

#region 创建excel工作簿

public void InsertExcel(string u, string p)

{

//1.创建Excel

try

{

//2.打开已经存在的工作簿

string path = "C:\\Users\\非黑不即白\\Desktop\\code.xlsx";

ExcelApp.Workbooks.Open(path, ReadOnly: false);

//3.

ExcelApp.Cells[1, 1].Value = "username";

ExcelApp.Cells[1, 2].Value = "password";

int RowCount = ExcelApp.ActiveSheet.UsedRange.Rows.Count + 1;

//ExcelApp.ActiveSheet.Rows[RowCount].Insert(u, p);

ExcelApp.Cells[RowCount, 1].Value = u;

ExcelApp.Cells[RowCount, 2].Value = p;

ExcelApp.DisplayAlerts = false; //保存Excel的时候，不弹出是否保存的窗口直接进行保存

//4.保存工作表

ExcelApp.ActiveWorkbook.Save();

}

catch

{

MessageBox.Show("导出文件保存失败,可能原因该文件已打开！", "警告！");

}

finally

{

//5.关闭工作簿

ExcelApp.ActiveWorkbook.Close();

//6.退出excel

ExcelApp.Quit();

// PublicMethod.Kill(ExcelApp);

}

#endregion

#region 读取excel工作簿数据

public Hashtable readExcel()

{

try

{

//2.打开已经存在的工作簿

string path = "C:\\Users\\非黑不即白\\Desktop\\code.xlsx";

//ExcelApp.Workbooks.Open(path, ReadOnly: true);

Hashtable h = new Hashtable();

Excel.Workbook wb = ExcelApp.Application.Workbooks.Open(path, ReadOnly: true); //取得工作簿

Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets.get_Item(1);

int rowsint = ws.UsedRange.Cells.Rows.Count; //得到行数

Excel.Range rng1 = ws.Cells.get_Range("A2", "A" + rowsint); // 取得数据范围区域(不包括标题列)

Excel.Range rng2 = ws.Cells.get_Range("B2", "B" + rowsint);

string[,] arry = new string[rowsint - 1, 2]; //将新值赋给一个数组

if (rowsint <= 1)

{

//MessageBox.Show("无账户信息，请先注册!"); LoginWindow已做判断，无需重复

return null;

}

else

{

if (rowsint == 2) //解决表格有一个数据用户，再添加时报错的问题

{

arry[0, 0] = rng1.Value2.ToString(); //rng.value2获取单元格数据

arry[0, 1] = rng2.Value2.ToString();

h.Add(rng1.Value2.ToString(), rng2.Value2.ToString());

Console.WriteLine(rng1.Value2.ToString() + " :" + rng2.Value2.ToString());

return h;

}

else

{

for (int i = 1; i <= rowsint - 1; i++)

{

arry[i - 1, 0] = rng1.Value2[i, 1].ToString(); //rng.value2获取单元格数据

arry[i - 1, 1] = rng2.Value2[i, 1].ToString();

h.Add(rng1.Value2[i, 1].ToString(), rng2.Value2[i, 1].ToString());

Console.WriteLine(rng1.Value2[i, 1].ToString() + " :" + rng2.Value2[i, 1].ToString());

}

return h;

}

catch

{

MessageBox.Show("read excel error");

return null;

}

finally

{

//5.关闭工作簿

ExcelApp.ActiveWorkbook.Close();

//6.退出excel

ExcelApp.Quit();

//PublicMethod.Kill(ExcelApp); //关闭excel后台进程，此处无需添加

}

#endregion

}

/* 关闭excel后台进程

public class PublicMethod

{

[DllImport("User32.dll", CharSet = CharSet.Auto)]

public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);

public static void Kill(Excel.Application excel)

{

IntPtr t = new IntPtr(excel.Hwnd);//得到这个句柄，具体作用是得到这块内存入口

int k = 0;

GetWindowThreadProcessId(t, out k); //得到本进程唯一标志k

System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k); //得到对进程k的引用

p.Kill(); //关闭进程k

}

}*/

}

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5.源码

结构总览：

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原文链接：https://blog.csdn.net/iceberg7012/article/details/115828265