Solved

ComboBox drop down width when font is bold

Posted on 2012-03-21
3
523 Views
Last Modified: 2012-03-25
Hello,

I am using Windows Forms, Visual Studio 2010.

I have several combo boxes with items longer than the combo is. So I've created a function which makes drop down width wide as the widest string is. Here is my function:

Public Sub WideComboDropDown()
        Dim conKontrola As ComboBox
        conKontrola = ComboBox2 'in this example I am using ComboBox2. Otherwise, it's
'conKontrola = Me, because whole class inherits ComboBox
       
        If conKontrola.Items.Count > 0 Then            
            Dim lengthHolding As Int32 = 0
            Dim stringWidth As Int32 = 0
            Dim g As Graphics = conKontrola.CreateGraphics
 'seeking for the longest item
            For Each myItem As Object In conKontrola.Items                              
                    lengthHolding = g.MeasureString(myItem, conKontrola.Font).Width + 15
             
                If lengthHolding > stringWidth Then
                    stringWidth = lengthHolding
                End If
            Next

            conKontrola.DropDownWidth = stringWidth + 15  '15 for scroll bar
End Sub

This function works perfect if use unbolded items. When I use bold font, width is not correctly calculated and I don't know what to do about it. Here are snap shots with text unbolded and bolded (I am from Slovenia, so text is Slovene).

Items are not in bolded text, string width is correct
Bolded text - width is not correct, string is much longer when text is bold

Best regards, Frenky
0
Comment
Question by:AntonioRodrigo
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 39

Expert Comment

by:appari
ID: 37746114
try changing this line

lengthHolding = g.MeasureString(myItem, conKontrola.Font).Width + 15

to

lengthHolding = g.MeasureString(myItem, New Font(conKontrola.Font, conKontrola.Font.Style)).Width + 15
0
 

Accepted Solution

by:
AntonioRodrigo earned 0 total points
ID: 37746141
Thanks for answer, but I was lucky on this one - I've found solution by myself. The problem was method g.MeasuerItem - this method calculates wrong.

I've used:

TextRenderer.MeasureText(string, font) - this one does the job correctly.

Helpful links:

http://stackoverflow.com/questions/263614/calculate-the-display-width-of-a-string-in-c#263637

http://msdn.microsoft.com/en-us/library/y4xdbe66.aspx
0
 

Author Closing Comment

by:AntonioRodrigo
ID: 37762434
TextRenderer.MesureText is the method you should use for measuring string sizes in combo boxes.
0

Featured Post

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This document covers how to connect to SQL Server and browse its contents.  It is meant for those new to Visual Studio and/or working with Microsoft SQL Server.  It is not a guide to building SQL Server database connections in your code.  This is mo…
For those of you who don't follow the news, or just happen to live under rocks, Microsoft Research released a beta SDK (http://www.microsoft.com/en-us/download/details.aspx?id=27876) for the Xbox 360 Kinect. If you don't know what a Kinect is (http:…
This is a high-level webinar that covers the history of enterprise open source database use. It addresses both the advantages companies see in using open source database technologies, as well as the fears and reservations they might have. In this…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question