CODEWITHSUNDEEP
c#wpftextboxgrid
SinTek Solutions
SinTek Solutions

Reputation: 115

Add textbox to grid with C#

I am fairly new to C#. I am trying to add a textbox to the grid by clicking a button. When I click this button, everything on my grid disappears:

    private void addLine_Click(object sender, System.EventArgs e)
    {
        System.Windows.Controls.TextBox txt = new System.Windows.Controls.TextBox();
        txt.Name = "textBox8";
        dxfLines.Children.Add(txt);
    }

Here is the xaml too:

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="DXFGenerator" Height="350" Width="525" Loaded="Window_Loaded">
    <Grid Name="dxfLines">
        <TextBox Height="23" HorizontalAlignment="Left" Margin="271,94,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" />
        <Button Content="Generate DXF" Height="23" HorizontalAlignment="Left" Margin="286,194,0,0" Name="button1" VerticalAlignment="Top" Width="84" Click="button1_Click" />
        <Button Content="Add Line" Height="23" HorizontalAlignment="Left" Margin="391,196,0,0" Name="button2" VerticalAlignment="Top" Width="75" Click="addLine_Click" />
    </Grid>
</Window>

Upvotes: 2

Views: 14071

Answers (1)

Reubene
Reubene

Reputation: 146

If you are using a grid you need to define rows and columns. Your xaml should look something like this:

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="DXFGenerator" Height="350" Width="525" Loaded="Window_Loaded">
    <Grid Name="dxfLines" x:FieldModifier="private" >
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition />
            <RowDefinition />
            <RowDefinition />
            <RowDefinition />
            <RowDefinition />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition />
            <ColumnDefinition />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <TextBox Height="23" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Grid.Column="2" Grid.Row="4" />
        <Button Content="Generate DXF" Height="23" HorizontalAlignment="Left" Grid.Column="1" Grid.Row="6" VerticalAlignment="Top" Width="84" Click="button1_Click" />
        <Button Content="Add Line" Height="23" HorizontalAlignment="Left"  Grid.Column="2" Grid.Row="6" VerticalAlignment="Top" Width="75" Click="addLine_Click" />
    </Grid>
</Window>

You also need to specify a row and column for the text box you are adding so the grid knows where to place the text box. The content of your addLine click should look something like:

System.Windows.Controls.TextBox txt = new System.Windows.Controls.TextBox();
txt.Name = "textBox8";
Grid.SetColumn(txt,1);
Grid.SetRow(txt, 1);
dxfLines.Children.Add(txt);

Besides, keep in mind that, in order to add a new child item, you select the Grid form and not the Window form . The Window form does not have the Children property, however in this example the Grid form has it.

Upvotes: 6

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