Override private method? Reflection? Please Help!

Matt

Hi,

I am trying to override a private method and to make things worse, the call is buried in another private method (several actually). Specifically, I have a custom DataGrid class (inheriting DataGrid) and I want to somehow get to the PaintColumnHeaderText(Graphics g, Rectangle boundingRect) method. My goal is to change the bounding rectangle's position to vertically align the headers.

any help is appreciated! ^_^

-Matt

4 Replies

Know the answer? Post it — somebody with the same question will find it here.

Matt19y ago
Thanks for the help, but it still isn't working. It worked but I can't cancel the original call so the method so it gets reset almost instantly. Any ideas to vertically align a colum header? I have a customized version that lets me have multiple rows.
0
Alan19y ago
Well, here's the code to call that particular method using reflection. I've assumed that you're calling it from your custom DataGrid class and that you're passing arguments of 'g 'and 'boundingRect' for the Graphcs and new Rectangle objects, respectively:

using System.Reflection;

.............

Type t = typeof(DataGrid);
BindingFlags bf = BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.InvokeMethod;
MethodInfo mi = t.GetMethod("PaintColumnHeaderText", bf);
int result = (int)mi.Invoke(this, new object[]{g, boundingRect});
0
Matt19y ago
If I could find a way to edit the location without it moving on me that'd work too. The problem is that I don't think that there is a variable that I can change. If I can move the bounding rectangle than I am happy.
0
Alan19y ago
Although it's possible to call a private virtual method using reflection, to the best of my knowledge it's not possible to override it in a derived class.

Would being able to simply call it suffice for what you're trying to do?
0