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Posted 28 Jul 2008

Change the height of a PropertyGrid's description area

, 28 Jul 2008
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How to change the height of a PropertyGrid's description area.

Background

I recently created a tool that used a PropertyGrid. The property descriptions tended to be very long, and would not fit in the control's description area. I decided to change the description height at runtime, since I couldn't figure out how to do it at design time. Since I had no clue how to proceed (my first C# project and my first time using Visual Studio 7.1), I searched the web for existing solutions. I failed to find any C# solution on the Web, but I did find a VB article on Matthew Cosier’s blog, and adapted that code to my purposes.

Using the code

Simply insert the function below into your code and call it:

Private bool ResizeDescriptionArea(ref PropertyGrid grid, int nNumLines)
{
  try
  {
    System.Reflection.PropertyInfo pi = grid.GetType().GetProperty("Controls");
    Control.ControlCollection cc = (ControlCollection)pi.GetValue(grid, null);

    foreach(Control c in cc)
    {
       Type ct = c.GetType();
       string sName = ct.Name;
       
       if(sName == "DocComment")
       {
           pi = ct.GetProperty("Lines");
           pi.SetValue(c, nNumLines, null);

           System.Reflection.FieldInfo fi = ct.BaseType.GetField("userSized",
               System.Reflection.BindingFlags.Instance,
               System.Reflection.BindingFlags.NonPublic);
 
           fi.SetValue(c, true);
       }
    }

    return true;
  }
  catch(Exception error)
  {
     #if(DEBUG)
        MessageBox.Show(error.Message, "ResizeDescriptionArea()");
     #endif
  
     return false;
  }
}

I call it like this:

private void Form1_load(object sender, System.EventArgs e)
{
    .
    .
    .
    ResizeDescriptionArea(ref grid1, 6);
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Geno Carman
United States United States
No Biography provided

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Comments and Discussions

 
QuestionMaximized Form Pin
Scott 9710-Apr-12 10:49
memberScott 9710-Apr-12 10:49 
AnswerRe: Maximized Form Pin
Member 15069666-Mar-14 12:19
memberMember 15069666-Mar-14 12:19 
QuestionOK, but can you GET the height? Pin
Graham Downs23-Feb-10 21:20
memberGraham Downs23-Feb-10 21:20 
AnswerRe: OK, but can you GET the height? Pin
Geno Carman25-Feb-10 4:51
memberGeno Carman25-Feb-10 4:51 
GeneralRe: OK, but can you GET the height? Pin
Graham Downs25-Feb-10 20:16
memberGraham Downs25-Feb-10 20:16 
GeneralRe: OK, but can you GET the height? Pin
Geno Carman26-Feb-10 13:17
memberGeno Carman26-Feb-10 13:17 
GeneralRe: OK, but can you GET the height? Pin
Graham Downs28-Feb-10 19:27
memberGraham Downs28-Feb-10 19:27 
GeneralThere is an error in the sample code Pin
Member 151940420-Jan-10 3:44
memberMember 151940420-Jan-10 3:44 
GeneralRe: There is an error in the sample code Pin
Geno Carman25-Feb-10 4:56
memberGeno Carman25-Feb-10 4:56 
GeneralGet"ControlCollection"Fail Pin
elvis_pan22-Nov-08 18:09
memberelvis_pan22-Nov-08 18:09 
AnswerRe: Get"ControlCollection"Fail Pin
Geno Carman23-Nov-08 5:56
memberGeno Carman23-Nov-08 5:56 
GeneralRe: Get"ControlCollection"Fail Pin
elvis_pan23-Nov-08 17:22
memberelvis_pan23-Nov-08 17:22 
GeneralRe: Get"ControlCollection"Fail Pin
Geno Carman23-Nov-08 17:36
memberGeno Carman23-Nov-08 17:36 
GeneralRe: Get"ControlCollection"Fail Pin
elvis_pan23-Nov-08 20:23
memberelvis_pan23-Nov-08 20:23 
GeneralRe: Get"ControlCollection"Fail Pin
Geno Carman24-Nov-08 14:58
memberGeno Carman24-Nov-08 14:58 
GeneralRe: Get"ControlCollection"Fail Pin
elvis_pan25-Nov-08 19:54
memberelvis_pan25-Nov-08 19:54 
GeneralRe: Get"ControlCollection"Fail Pin
julian_perrott17-Mar-09 7:00
memberjulian_perrott17-Mar-09 7:00 
Generalhi Pin
Member 43421426-Aug-08 15:42
memberMember 43421426-Aug-08 15:42 
GeneralRe: hi Pin
Geno Carman6-Aug-08 18:54
memberGeno Carman6-Aug-08 18:54 
GeneralRe: hi Pin
Member 434214211-Aug-08 15:03
memberMember 434214211-Aug-08 15:03 
GeneralRe: hi Pin
Geno Carman12-Aug-08 15:29
memberGeno Carman12-Aug-08 15:29 
GeneralRe: hi Pin
jmt9n29-Aug-08 5:14
memberjmt9n29-Aug-08 5:14 
GeneralRe: hi Pin
Geno Carman29-Aug-08 9:34
memberGeno Carman29-Aug-08 9:34 

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