does GetRectFromCharacterIndex work?????

Question

this does not seems to work
 TextBox2.Text = TextBox1.GetRectFromCharacterIndex(TextBox1.Text.Length).Width & "/" & TextBox1.GetRectFromCharacterIndex(TextBox1.Text.Length).Height & "=" & TextBox1.Text.Length

it does not matters how much text i write in thext box but the .wdith and heigh of the rect is fixed while the TextBox1.Text.Length gives the right results


why is that


<Window x:Class="Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="471" Width="858">

 <Grid>
  <Button Height="23" HorizontalAlignment="Right" Margin="0,124,186,0" Name="Button1" VerticalAlignment="Top" Width="75">Button</Button>
  <TextBox Margin="35,37,357,91" Name="TextBox1" AcceptsReturn="True" AcceptsTab="True"
  TextChanged="TextBox1_TextChanged" ></TextBox>
  <TextBox Height="65" HorizontalAlignment="Right" Margin="0,30,40,0" Name="TextBox2" VerticalAlignment="Top" Width="201" />
 </Grid>



 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Button1.Click
 
        TextBox2.Text = TextBox1.GetRectFromCharacterIndex(TextBox1.Text.Length).Width & "/" & TextBox1.GetRectFromCharacterIndex(TextBox1.Text.Length).Height & "=" & TextBox1.Text.Length
        Beep()

    End Sub

Answer 1

Hi Mark,

The MSDN document says:

Because this method returns a rectangle that represents an edge of the character, the width of the rectangle is 0.

It's by design that the GetRectFromCharacterIndex method should return a rectangle of 0 width.

What are you trying to do? If you mean the same thing in this thread(http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/2b8e8f9b-b8a6-4a2e-8c9e-4987f2e6ab44 ), please check my sample in it.


If you have any questions or concerns, please feel free to let me know.

Best Regards,
Zhi-Xin

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