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Hi, I want to create simple application with DiagramWebControl and PaletteGroupBar. All works great with palettes shipped with installation, but when i design my own palette with Symbol Designer i keep getting this error message:
Unable to cast object of type 'Syncfusion.Windows.Forms.Diagram.SymbolPalette' to type 'Syncfusion.Windows.Forms.Diagram.SymbolPalette'
MWMelba Winshia Syncfusion Team July 12, 2010 09:36 AM UTC
Hi Lukas,
Thank you for using Syncfusion products.
By default the "Symbol designer" which you run from "Syncfusion -> Utilities -> Diagram -> Symbol designer" will run only in 2.0 framework version(refers to 8.202.0.18 ES version). So, if you modify any edp files with this, the version saved in that file would be in 2.0 framework version only.
So, if you want to run symbol designer utility in 3.5 framework version ( refers to 8.303.0.18 ES version), then please follow the following steps:
1) Open the source of Symbol designer from the following location