Ehm, umm, this means some lines should be two-lined in size. My boss think this is more simple solution, than limit displayed text to fit width and don't like horizontal scroll bar >_<
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4 Answers
lst.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable;
lst.MeasureItem += lst_MeasureItem;
lst.DrawItem += lst_DrawItem;
private void lst_MeasureItem(object sender, MeasureItemEventArgs e)
{
e.ItemHeight = (int)e.Graphics.MeasureString(lst.Items[e.Index].ToString(), lst.Font, lst.Width).Height;
}
private void lst_DrawItem(object sender, DrawItemEventArgs e)
{
e.DrawBackground();
e.DrawFocusRectangle();
e.Graphics.DrawString(lst.Items[e.Index].ToString(), e.Font, new SolidBrush(e.ForeColor), e.Bounds);
}
13 Comments
Bill Sambrone
Love it. One minor thing though. When I databind a custom class, the DisplayMember gets wiped and I can't seem to reset it. Any tips?
Kosmo零
@BillSambrone - Sorry, but I don't use databind and never meet same problem and don't know how to solve.
Sebastien H.
@AycanYaşıt : totaly agree
Diego C Nascimento
@Kosmos Seems that the
ListBox caches the items height, what is good. The problem is that if the ListBox is resized it don't recalculates the height! I'm trying someway to clean the cache of items height without removing and adding then, in the resize, but I don't find any method for that. At least documented.Kosmo零
@DiegoCNascimento - I used
ListBox.Refresh method in resize handler for that. |
private void lst_MeasureItem(object sender, MeasureItemEventArgs e)
{
e.ItemHeight = (int)e.Graphics.MeasureString(lst.Items[e.Index].ToString(), lst.Font, lst.Width).Height;
}
private void lst_DrawItem(object sender, DrawItemEventArgs e)
{
e.DrawBackground();
e.DrawFocusRectangle();
e.Graphics.DrawString(lst.Items[e.Index].ToString(), e.Font, new SolidBrush(e.ForeColor), e.Bounds);
}
To get the right display member to show up when data binding, replace
lst.Items[e.Index].ToString()
with a casted version of the property. So if your binding source is class object Car it would look like
((Car)lst.Items[e.Index]).YourDisplayProperty
Then the above functions can appropriately measure the string and draw it. :)
Comments
Check out this answer. It overrides the template of the listbox with a textblock which wraps the text. Hope it's useful. To solve your problem I think you shold add : ScrollViewer.HorizontalScrollBarVisibility="Disabled" . Found it here
1 Comment
Kosmo零
Thanks, but I use win forms :(
To make binding correct, be sure to add check "lst.Items.Count > 0" to lst_MeasureItem function. Here is my example:
if (lst.Items.Count > 0)
{
e.ItemHeight = (int)e.Graphics.MeasureString(lst.Items[e.Index].ToString(), lst.Font, lst.Width).Height;
}
Everything else seems to work nicely after that.
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