将文本框值从父窗口传递到页面wpf

时间:2013-10-26 19:41:28

标签: c# wpf windows data-binding mvvm

毫无疑问,我不是第一个提出这种性质的人。对于大多数这些问题,回复将提到MVVM,当涉及到wpf时,并没有真正解释它是如何完成的,或至少给出一个适用的例子。其余的是特定于这些人的特殊情况。

想象一下,我在主窗口中有一个文本框,我在页面中也有一个文本框。我需要将主窗口中文本框中的文本传递到子窗口中的文本框。怎么做的?

winforms中使用的方法似乎只适用于窗口到窗口。每次在页面声明中输入值并运行它时,它都会引发异常。

页面是通过链接打开的,如果它有用,我正在使用wpf的现代ui主题:http://mui.codeplex.com

主窗口xaml

  <mui:ModernWindow x:Class="Masca.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mui="http://firstfloorsoftware.com/ModernUI"
Title="Masca Database Admin" Height="800" Width="1280" IsTitleVisible="True"
LogoData="F1 M 24.9015,43.0378L 25.0963,43.4298C 26.1685,49.5853 31.5377,54.2651 38,54.2651C 44.4623,54.2651 49.8315,49.5854 50.9037,43.4299L 51.0985,43.0379C 51.0985,40.7643 52.6921,39.2955 54.9656,39.2955C 56.9428,39.2955 58.1863,41.1792 58.5833,43.0379C 57.6384,52.7654 47.9756,61.75 38,61.75C 28.0244,61.75 18.3616,52.7654 17.4167,43.0378C 17.8137,41.1792 19.0572,39.2954 21.0344,39.2954C 23.3079,39.2954 24.9015,40.7643 24.9015,43.0378 Z M 26.7727,20.5833C 29.8731,20.5833 32.3864,23.0966 32.3864,26.197C 32.3864,29.2973 29.8731,31.8106 26.7727,31.8106C 23.6724,31.8106 21.1591,29.2973 21.1591,26.197C 21.1591,23.0966 23.6724,20.5833 26.7727,20.5833 Z M 49.2273,20.5833C 52.3276,20.5833 54.8409,23.0966 54.8409,26.197C 54.8409,29.2973 52.3276,31.8106 49.2273,31.8106C 46.127,31.8106 43.6136,29.2973 43.6136,26.197C 43.6136,23.0966 46.127,20.5833 49.2273,20.5833 Z"          
ContentSource="/Pages/Home.xaml">

    

子窗口xaml

  <UserControl x:Class="Masca.Mail.Configuration"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     xmlns:mui="http://firstfloorsoftware.com/ModernUI"
     mc:Ignorable="d" 
     d:DesignHeight="800" d:DesignWidth="1280">

<TextBox x:Name="alias" Margin="186,64,0,0" Height="18" VerticalAlignment="Top" HorizontalAlignment="Left" Width="211" FontSize="11" ></TextBox>

我这样做是为了让程序知道哪个用户正在登录,可以记录谁在对数据库进行哪些更改。

1 个答案:

答案 0 :(得分:0)

我将如何做到这一点是将第二页的DataContext属性设置为第一页。然后我可以通过Binding访问第二页的第一页的属性。为此,最好在您的应用程序中使用MVVM,然后在第1页的ViewModel中定义属性,然后在第2页中定义DataContext。现在您可以在第2页访问该属性。