Thanks for using Syncfusion products.
1. We suggest you to use the ‘TextNode’ instead of using Label to rotate the text in vertical because the TextNode contains the property of “DirectionVertical” to rotate the text in vertical when it is set to ‘true’. Please refer the below code to achieve your requirement.
Here is the code snippet:
TextNode txtnode = new TextNode("Syncfusion",new RectangleF(100,100,100,100));
//To set the text in Vertical position.
txtnode.DirectionVertical = true;
//Adjusting size of the node to fit the text.
txtnode.SizeToText(new SizeF(0, 0));
//Hiding the Boundary line of the textnode.
txtnode.LineStyle.LineWidth = 0;
Group grp = new Group();
2. You can also use the container node to host the label and rotate the label to vertical by rotating the container node.Please refer the below code snippet.
Here is the code:
//Label inside a container node.
Syncfusion.Windows.Forms.Diagram.Rectangle rect = new Syncfusion.Windows.Forms.Diagram.Rectangle(250, 100, 100, 100);
//Changing the fillcolor of the node to Transparent.
rect.FillStyle.Color = Color.Transparent;
//Hiding the Boundary line of the node.
rect.LineStyle.LineWidth = 0;
//Rotating the node in 90 degree
rect.RotationAngle = 90;
//Adding label to the container node.
rect.Labels.Add(new Syncfusion.Windows.Forms.Diagram.Label(rect, "Label inside container"));
Group grp1 = new Group();
For your convenience, we have created a simple sample to achieve your requirement.
Please try the below sample and let us know if you have any queries.Forum adding labels to group node-312248110.zip
Amsath Ali. M