程序集createinstance和Crystal报告问题

Question

I load an assembly

private System.Reflection.Assembly;
object myData;

myAssembly = System.Reflection.Assembly.LoadFile("C:\\CrystalDecisions.CrystalReports.Engine.dll");

then i create an instance.

myData=myAssembly.CreateInstance("CrystalDecisions.CrystalReports.Engine.ReportDocument", true);

this myData always returns null, any thought why it is returning null where as myAssembly has the assembly information and its public key token?

Answer 1

try something like the following below..

// dynamically load assembly from file Test.dll
Assembly myData = Assembly.LoadFile(@"C:\CrystalDecisions.CrystalReports.Engine.dll");

// get type of class Calculator from just loaded assembly
Type myData = myData.GetType("CrystalDecisions.CrystalReports")

// create instance of class Calculator
object myDataInstance = Activator.CreateInstance(myData);

Reflection Examples C#