Question

I created a grid on my WPF application with 4 rows and columns to display media:

        <Grid Name="ControlsGrid">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="33*" />
                <ColumnDefinition Width="33*" />
                <ColumnDefinition Width="33*" />
                <ColumnDefinition Width="33*" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="33*" />
                <RowDefinition Height="33*" />
                <RowDefinition Height="33*" />
                <RowDefinition Height="33*" />
            </Grid.RowDefinitions>
        </Grid>

And from another method i add to the grid:

            WindowsFormsHost formhost = new WindowsFormsHost();
            formhost.Child = new System.Windows.Forms.Control();
            formhost.Child = control;
            ControlsGrid.Children.Add(formhost);

The objects are loading fine, during debug i see the size of collection increases.. but the control is being displayed on the first 0,0 grid and when adding a new control it over ride the control that was there.
How can i set the control on an empty place on the grid ?

Answer 1

You just have to set the Grid.Column and Grid.Row for the controls to be in each space.

However I noticed you are setting all the Grid Columns/Rows the same size, so perhaps UniformGrid would be a better option

Xaml:

<Window x:Class="WpfApplication16.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" Name="UI">
    <UniformGrid Name="ControlsGrid" Rows="4" Columns="4" />
</Window>

Code:

public partial class MainWindow : Window
{

    public MainWindow()
    {
        InitializeComponent();
        AddWinformControls();
    }

    private void AddWinformControls()
    {
        for (int i = 0; i < 12; i++)
        {
            WindowsFormsHost formhost = new WindowsFormsHost();
            formhost.Child = new System.Windows.Forms.Label() { Text = "Hello" };
            ControlsGrid.Children.Add(formhost);
        }
    }
}