Hi team,

I encountered a strange problem when I used the Diagram component.

If the ImageFormat type is set to - image/png

and the backbrush is set to transparent - diagramView.Diagram.BackBrush = new SolidBrush(Color.Transarent).

When preview the diagram, the geneated text is get degraded and is not very clear.

Please take a look the image to see the effect.
.

Since we need to set the backbrush of the diagra view via image method, so it seems like we have to set the brush to transparent to show the real brush on the background of page.

Is there a way to solve this problem? Thanks.

Stoyo wrote on Jun 9^th, 2011 at 8:58am:


No, it's not print preview, we're just show it the diagram on the web. I have made a demo to show the problem, how can I upload it on the server?

This is the code snippet:
HTML-
<ndiag:DiagramView ID="diagramView" runat="server" ClientSideMode="ImageMap" ImageFormat="image/png">
</ndiag:DiagramView>

Code.cs -
diagramView.Diagram.BackBrush = new MindFusion.Drawing.SolidBrush(Color.Transparent);

Then if you view the page, you can see the problem.

Another point is "When text is in a non-transparent object it’s fine. When the object is made transparent it get degraded."

Stoyo wrote on Jun 9^th, 2011 at 9:51am:


Hi, I have sent the demo to the email, thanks for your replying.

Hoping yours feedback.

Thanks for your suggestion, it can solve the problem that the text is directly draw on the diagram.

However, it still has the problem that when the shape's transparent is set to True and the shape is included in the diagram. In this salutation, the text that displayed on the shape is degraded also.

I also tried:
diagramView.Diagram.DrawNode += new MindFusion.Diagramming.DrawNodeEventHandler(Diagram_DrawNode);
void Diagram_DrawNode(object sender, MindFusion.Diagramming.DrawNodeEventArgs e)
       {
           e.Graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
       }

But it still does not solve the problem. Do you have any other suggestion? Thanks again.