Question

I need to update textblock inside childWindow based on file name that is being selected with OpenDialog Window. Since I am not running OpenDialog from childWindow I have trouble passing that value to the texblock inside ChildWindow. I am wondering if someone can help. As a result of th issue I have, I am wondering if it is possible to have OpenDialog inside ChildWindow? Thank you for any ideas!

ChildWindow xaml:

<sdk:ChildWindow 
x:Class="AddPackages_ChildWindow"
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:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"   
xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit"
AutomationProperties.AutomationId="AddPackages_ChildWindow">

<Grid x:Name="AddPackages_ChildWindow_LayoutRoot" AutomationProperties.AutomationId="AddPackages_ChildWindow_LayoutRoot" Style="{StaticResource AVV_GridStyle}">
    <TextBlock x:Name="txtUpdate_Package" AutomationProperties.AutomationId="txtUpdate_Package" Text="FileName" />  </Grid>

Below is the code to open DialogBox and passing selected file name:

private void Package_Click(object sender, System.Windows.RoutedEventArgs e)
    {
        AddPackage_ChildWindow ap = new AddPackage_ChildWindow();
        ap.Show();

        OpenFileDialog openFileDialog1 = new OpenFileDialog();
        openFileDialog1.Filter = "App-V Packages (*.sprj)|*.sprj|App-V Packages (*.sprj)|*.sprj";
        openFileDialog1.FilterIndex = 1;

        openFileDialog1.Multiselect = true;

        bool? userClickedOK = openFileDialog1.ShowDialog();

        if (userClickedOK == true)
        {
            //passing the file name string
            txtUpdate_Package.Text = openFileDialog1.File.Name;
            System.IO.Stream fileStream = openFileDialog1.File.OpenRead();

            using (System.IO.StreamReader reader = new System.IO.StreamReader(fileStream))
            {
                // Read the first line from the file and write it the textbox.
                // txtUpdate_Package.Text = reader.ReadLine();
            }
            fileStream.Close();
        }
    }

Answer 1

You could expose a SetText method on your ChildWindow class like so:

public void SetText(string text) {
    this.txtUpdate_Package.Text = text;
}

Then you’d call it like so from your Package_Click method:

ap.SetText(reader.ReadLine());