I am trying to figure out a way to use the StringFormat class to add new line to a given TreeNode text. For example, the string ID1:123456, ID2:789000, can be split by comma and insert a newline in between, so it has two lines.
I understand there is no need to make a TreeNode text into multiple lines, but this is required by my supervisor and I have no choice.
My current solution is to override a DrawNode function, and use the DrawString function to customize TreeNode text format, but my question is I don't know how to insert newline at this stage.
private void TreeView_SO_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
e.DrawDefault = false;
string drawString = e.Node.Text;
Font drawFont = ((TreeView)sender).Font;
SolidBrush drawBrush = new SolidBrush(Color.Black);
StringFormat drawFormat = new StringFormat();
// what to put in here to insert a new line?
e.Graphics.DrawString(drawString, drawFont, drawBrush, e.Node.Bounds, drawFormat);
}
Update
Thank you for everyone's help. I ended up finding this is quite easy, thanks to EskeRahn's codes posted on: WINDOWS TREEVIEW WITH E.G. MULTI-LINE TREE CONTENT. This code is quite useful; however, I only need part of EskeRnhn's code to perform my ideal operation. So my code ended up like this,
private void TreeView_SO_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
e.DrawDefault = false;
string drawString = e.Node.Text;
Font drawFont = ((TreeView)sender).Font;
SolidBrush drawBrush = new SolidBrush(Color.Black);
Rectangle eNodeBounds = NodeBounds(e.Node);
e.Graphics.DrawString(drawString, drawFont, drawBrush, eNodeBounds);
}
private Rectangle NodeBounds(TreeNode node)
{
if (node?.TreeView != null && node?.Text != null && (0 < node.Bounds.Location.X || 0 < node.Bounds.Location.Y))
{
using (Graphics g = node.TreeView.CreateGraphics())
{
SizeF textSize = g.MeasureString(node.Text, node.NodeFont ?? node.TreeView.Font);
return Rectangle.Ceiling(new RectangleF(PointF.Add(node.Bounds.Location,
new SizeF(0, (node.TreeView.ItemHeight - textSize.Height) / 2)),
textSize));
}
}
else
{
return node?.Bounds ?? new Rectangle();
}
}
, where I don't need to worry about the the StringFormat class at all, because I already override the a DrawNode function, so when I pass the string to TreeNode text, I just need to add newline symbols. I have tested multiple cases and this piece of code works well.
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