WPF文本在文本框中未对齐

Question

How to solve the text out of alignment in text box UI, but it was fine in copy to clipboard function to text file.

Thanks

XAML：

     <Grid>
         <Grid.ColumnDefinitions>
            <ColumnDefinition Width="20" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <StackPanel Orientation="Vertical" HorizontalAlignment="Left" Grid.Column="1" >
            <TextBox Name="txtServiceParameter" Width="550" Height="460" IsReadOnly="True" Margin="10, 10, 0, 0" AcceptsReturn="True" VerticalScrollBarVisibility="Auto" TextWrapping="Wrap" Text="{Binding DefaultText}" FontSize="12" FontFamily="Microsoft Sans Serif" HorizontalContentAlignment="Left"/>
            <Button Content="Copy to Clipboard" Width="150" Height="30" Margin="10, 10, 0, 0" Command="{Binding CopyToClipboardCommand}" />
        </StackPanel>
    </Grid>

C#:

        defaultText += "Hello World - Class 1 Day 1 " + DateTime.Now.ToString("dd/MM/yyyy H:mm:ss");
        defaultText += Environment.NewLine;
        defaultText += Environment.NewLine;
        defaultText += Environment.NewLine;
        defaultText += "************************************************************************";
        defaultText += Environment.NewLine;
        defaultText += "Mathemathic Class";
        defaultText += Environment.NewLine;
        defaultText += "************************************************************************";
        defaultText += Environment.NewLine;
        defaultText += Environment.NewLine;
        defaultText += string.Format("{0, -3}, {1,-34}, {2}", "01", "Hello", "EEE910");
        defaultText += Environment.NewLine;
        defaultText += string.Format("{0, -3}, {1,-34}, {2}", "02", "Belo haha", "");          

        private void ExecuteCopyToClipboardCommand()
        {
          Clipboard.SetText(defaultText);
        }

Answer 1

Change the font family on the TextBox to one that is Monospaced . The problem is the font you are using. It does not have a fixed with for each character.

Answer 2

通常，对于空格，我通常会使用某种空格字符的乘法，例如，如果需要10个空格，则将1-乘以2。这不是最好的答案，但它可以工作