Adding OldToNewDeserializationBinder for loading old edp file in new version.
Convert old versioned EDP/EDD file in new version
To overcome the problems while loading old versioned EDP/EDD files in newer version projects, some conversion is needed in the WinForms Diagram. For example, if your EDP/EDD file version is 3.0 and the project version is 7.0, initially place the old versioned EDP/EDD files in the bin location of `<OldToIntermediate sample>`. After running the sample, it will generate an EDP/EDD file of the intermediate version.
Then, the generated intermediate file must be placed in the bin location of `<IntermediateToNew Sample>`. After running the sample, it will generate a new EDP/EDD file. This file can be loaded into the newer version projects, and the problem won’t occur.
Location for the Converter Sample:
C:\Users\<UserName>\AppData\Local\Syncfusion\EssentialStudio\<Installed Version>\Windows\Diagram.Windows\Samples\Converter
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While using the EDD/EDP files of older version and loading in newer version it will throw Serialization exception. To avoid that exception the assembly resolver code must be used.
Add the below code snippet in your customized sample:
[C#]
public void LoadPalette1(string filename)
{
SymbolPalette symbolPalette = null;
FileStream iStream;
IFormatter formatter = new BinaryFormatter();
((BinaryFormatter)formatter).AssemblyFormat = FormatterAssemblyStyle.Simple;
((BinaryFormatter)formatter).TypeFormat = FormatterTypeStyle.TypesWhenNeeded;
((BinaryFormatter)formatter).FilterLevel = TypeFilterLevel.Low;
//Assembly resolver
formatter.Binder = new OldToNewDeserializationBinder();
iStream = new FileStream(filename, FileMode.Open, FileAccess.Read);
symbolPalette = (SymbolPalette)formatter.Deserialize(iStream);
}
[C#]
//Use the below sealed class for Assembly resolver
public sealed class OldToNewDeserializationBinder : SerializationBinder
{
public override Type BindToType(string assemblyName, string typeName)
{
Type typeToDeserialize;
// For each assemblyName/typeName that you want to deserialize to
// a different type, set typeToDeserialize to the desired type.
string assem = Assembly.GetExecutingAssembly().FullName;
if (assemblyName.IndexOf("Syncfusion.Diagram") != -1 && assemblyName.IndexOf("Version", 0) != -1)
{
// find "Version" substring
int nIdxStart = assemblyName.IndexOf("Version", 0);
int nIdxEnd = assemblyName.IndexOf(",", nIdxStart);
int nIdxRplStart = assem.IndexOf("Version", 0);
int nIdxRplEnd = assem.IndexOf(",", nIdxRplStart);
// replace whole "Version" substring
assemblyName = assemblyName.Replace(
assemblyName.Substring(nIdxStart, nIdxRplStart + (nIdxEnd - nIdxStart)),
assem.Substring(nIdxRplStart, nIdxRplStart + (nIdxRplEnd - nIdxRplStart)));
}
if (typeName.IndexOf("LineNode") != -1)
{
// types binding to ensure loading previous versions
typeName = typeName.Replace("LineNode", "Line");
}
// The following line of code returns the type.
typeToDeserialize = Type.GetType(String.Format("{0}, {1}", typeName, assemblyName));
return typeToDeserialize;
}
}
}
[VB]
Public Sub LoadPalette1(ByVal filename As String) Dim symbolPalette As SymbolPalette = Nothing Dim iStream As FileStream Dim formatter As IFormatter = New BinaryFormatter() CType(formatter, BinaryFormatter).AssemblyFormat = FormatterAssemblyStyle.Simple CType(formatter, BinaryFormatter).TypeFormat = FormatterTypeStyle.TypesWhenNeeded CType(formatter, BinaryFormatter).FilterLevel = TypeFilterLevel.Low 'Assembly resolver formatter.Binder = New OldToNewDeserializationBinder() iStream = New FileStream(filename, FileMode.Open, FileAccess.Read) symbolPalette = CType(formatter.Deserialize(iStream), SymbolPalette) End Sub
[VB]
Public NotInheritable Class OldToNewDeserializationBinder
Inherits SerializationBinder
Public Overrides Function BindToType(ByVal assemblyName As String, ByVal typeName As String) As Type
Dim typeToDeserialize As Type
' For each assemblyName/typeName that you want to deserialize to
' a different type, set typeToDeserialize to the desired type.
Dim assem As String = System.Reflection.Assembly.GetExecutingAssembly().FullName
If assemblyName.IndexOf("Syncfusion.Diagram") <> -1 AndAlso assemblyName.IndexOf("Version", 0) <> -1 Then
' find "Version" substring
Dim nIdxStart As Integer = assemblyName.IndexOf("Version", 0)
Dim nIdxEnd As Integer = assemblyName.IndexOf(",", nIdxStart)
Dim nIdxRplStart As Integer = assem.IndexOf("Version", 0)
Dim nIdxRplEnd As Integer = assem.IndexOf(",", nIdxRplStart)
' replace whole "Version" substring
assemblyName = assemblyName.Replace(assemblyName.Substring(nIdxStart, nIdxRplStart + (nIdxEnd - nIdxStart)), assem.Substring(nIdxRplStart, nIdxRplStart + (nIdxRplEnd - nIdxRplStart)))
End If
If typeName.IndexOf("LineNode") <> -1 Then
' types binding to ensure loading previous versions
typeName = typeName.Replace("LineNode", "Line")
End If
' The following line of code returns the type.
typeToDeserialize = Type.GetType(String.Format("{0}, {1}", typeName, assemblyName))
Return typeToDeserialize
End Function
End Class
Conclusion
I hope you enjoyed enjoyed learning about adding `OldToNewDeserializationBinder` for loading old versioned EDP files in a new version.
You can refer to our WinForms Diagram feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications.
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