鼠标单击时弹出输入对话框

Question

我试图做到这一点，当用户单击画布中的某个位置时，会显示一个弹出窗口，允许用户输入两个单独的数据片段。所以我需要两个文本块，然后是保存输入到代码隐藏中某些变量中的数据的方法。我一直在看不同的教程，很容易制作一个带有输入 texblocks 的窗口。只是不确定如何使用弹出窗口来做到这一点。addNode_MouseDown方法是我尝试添加弹出窗口的地方，因为输入的信息将是关于用户单击画布时制作的圆圈。任何帮助将不胜感激。

这是我目前的代码：

XAML：

<Window x:Class="CanvasStuff.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Main Window" Height="410" Width="869">
 <Grid Height="387">
    <Label Content="Image" Height="32" HorizontalAlignment="Left" Margin="11,10,0,0"
           Name="selectedFileName" VerticalAlignment="Top" Width="137"
           Background="LightGray" BorderBrush="Gray" BorderThickness="1"/>
    <Button Content="Browse File" Height="34" HorizontalAlignment="Left" Margin="154,6,0,0"
            Name="BrowseButton" VerticalAlignment="Top" Width="119"
            Foreground="Maroon" FontSize="16" FontFamily="Georgia" Click="BrowseButton_Click" />
    <Button Content="Input Range and Heading" Height="34" HorizontalAlignment="Left" Margin="279,6,0,0"
            Name="InputRangeBearing" VerticalAlignment="Top" Width="191"
            Foreground="Maroon" FontSize="16" FontFamily="Georgia" Click="InputButton_Click" />
    <Canvas Margin="0,45,2,8" x:Name="canvas1" MouseDown= "addNode_MouseDown">
    </Canvas>
 </Grid>
</Window>

代码隐藏：

namespace CanvasStuff
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class MainWindow
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private void BrowseButton_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.InitialDirectory = "c:\";
            dlg.Filter = "Image files (*.jpg)|*.jpg|All Files (*.*)|*.*";
            dlg.RestoreDirectory = true;
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                string selectedFileName = dlg.FileName;
                ImageBrush brush = new ImageBrush();
                brush.ImageSource = new BitmapImage(new Uri(selectedFileName));
                canvas1.Background = brush;
                BitmapImage bitmap = new BitmapImage();
            }
        }
        private void InputButton_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("Please click on known object to enter range and heading of that     object.");
        }
        private void addNode_MouseDown(object sender, MouseButtonEventArgs e)
        {
            Point currentPoint = new Point();
            if (e.ButtonState == MouseButtonState.Pressed)
                currentPoint = e.GetPosition(this);
            Ellipse ellipse = new Ellipse();
            SolidColorBrush mySolidColorBrush = new SolidColorBrush();
            mySolidColorBrush.Color = Color.FromArgb(255, 255, 255, 0);
            ellipse.Fill = mySolidColorBrush;
            ellipse.Width = 10;
            ellipse.Height = 10;
            Canvas.SetLeft(ellipse, e.GetPosition(canvas1).X);
            Canvas.SetTop(ellipse, e.GetPosition(canvas1).Y);
            canvas1.Children.Add(ellipse);
        } 
    }
}

Answer 1

您是否尝试使用PopUp窗口？

XAML：

<Popup Name="errMsg" StaysOpen="False">
<TextBox/>
</Popup>

在代码隐藏中：

errMsg.IsOpen = true;

或者，您可以完全使用代码创建：

WPF 弹出窗口

参考：

弹出用户控件