如何在 XAML WPF TextBox 的代码隐藏中存储用户文本输入答案

【问题标题】：How to Store User Text Input in Code-Behind From XAML WPF TextBox如何在 XAML WPF TextBox 的代码隐藏中存储用户文本输入
【发布时间】：2016-10-05 21:26:51
【问题描述】：

我的问题很简单。

正如标题所述，我想知道如何将从 XAML 输入到 WPF TextBox 中的用户文本存储为代码隐藏中的字符串元素。其概念是用户在 TextBox 中输入文本，然后在单击“完成”按钮时，该 TextBox 中的值作为字符串元素存储在代码隐藏中（可以输入到数组中）。

XAML

<Window x:Class = "WpfApplication3.MainWindow" 
xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
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:WpfApplication3" 
mc:Ignorable = "d" Title = "MainWindow" Height = "350" Width = "604">
<Grid Background = "White" Margin="0,4,0,-4">
    <Grid.RowDefinitions>
        <RowDefinition Height = "*" />
        <RowDefinition Height = "*" />
        <RowDefinition Height = "*" />
        <RowDefinition Height = "*" />
        <RowDefinition Height = "*" />
    </Grid.RowDefinitions>

    <Grid.ColumnDefinitions>
        <ColumnDefinition Width = "*" />
    </Grid.ColumnDefinitions>

    <Label Content = "Employee Info" FontSize = "15"
     FontWeight = "Bold" Grid.Column = "0" Grid.Row = "0"/>

    <StackPanel Grid.Column = "0" Orientation = "Horizontal" Margin="0,38,0,26" Grid.RowSpan="2">
        <Label Content = "Name"  VerticalAlignment = "Center" Width = "70"/>
        <TextBox Name = "txtName" Text = "Muhammad Ali" VerticalAlignment = "Center"
        Width = "200">
        </TextBox>
    </StackPanel>

    <StackPanel Grid.Column = "0" Grid.Row = "1" Orientation = "Horizontal" Margin="0,2,0,62" Grid.RowSpan="2">
        <Label Content = "ID" VerticalAlignment = "Center" Width = "70"/>
        <TextBox Name = "txtID" Text = "421" VerticalAlignment = "Center"
        Width = "50">
        </TextBox>
    </StackPanel>

    <StackPanel Grid.Column = "0" Grid.Row = "1" Orientation = "Horizontal" Margin="0,32" Grid.RowSpan="2">
        <Label Content = "Age" VerticalAlignment = "Center" Width = "70"/>
        <TextBox Name = "txtAge" Text = "32" VerticalAlignment = "Center"
        Width = "50"></TextBox>
    </StackPanel>

    <StackPanel Grid.Column = "0" Grid.Row = "1" Orientation = "Horizontal" Margin="0,61,0,4" Grid.RowSpan="2">
        <Label Content = "Position" VerticalAlignment = "Center" Width = "70"/>
        <TextBox Name = "txtPosition" Text = "Programmer" VerticalAlignment = "Center"
        Width = "200"></TextBox>

    </StackPanel>
    <Button Click ="Button_Click" x:Name="button" Content="Finished" HorizontalAlignment="Left" Margin="172,21,0,0" Grid.Row="4" VerticalAlignment="Top" Width="237"/>

</Grid>

代码隐藏

namespace WpfApplication3
{
    public partial class MainWindow : Window


    string EmpName = "blank";
    string EmpID = "blank";
    string EmpAge = "blank";
    string EmpPosition = "blank";

    public MainWindow()
    {
        InitializeComponent();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        txtName = EmpName;   //Here's where I attempt to store the TextBox Information
        txtID = EmpID;
        txtAge = EmpAge;
        txtPosition = EmpPosition;
    }


  }
}

感谢观看！

【问题讨论】：

你试过txtName.Text = EmpName吗？目前您正在更改整个文本框控件，而不仅仅是其中的文本。要将数据从 gui 读取到您的代码中，只需交换这两者即可得到 EmpName = txtName.Text。可能你应该看看 assignments 和 Properties 在 C# 中是如何工作的，这可以帮助你理解。
啊，所以必须颠倒过来。很简单！非常感谢！
或者，只需将文本框绑定到您要使用的属性。了解了赋值和属性的基础知识后，您可能希望查找“WPF 中的 MVVM”。

标签： c# wpf string xaml code-behind

【解决方案1】：

正如 CShark 所写，您还应该对 assignments 和其他基本语言用法进行一些研究。这是点击事件处理程序：

private void button_Click(object sender, RoutedEventArgs e)
{
    EmpName = txtName.Text;             // Use the Text property to get the (string) value of the entered text.
    EmpID = txtID.Text;                 // The left hand side of the assignment operator gets assigned the right hand side expression.
    EmpAge = txtAge.Text;               
    EmpPosition = txtPosition.Text;
}

请注意，许多其他控件将其值存储在属性内容中（例如标签）

【讨论】：