csharp System.CodeDom.CodeTryCatchFinallyStatement类(方法)实例源码

// Declares a type to contain a try...catch block.
        CodeTypeDeclaration type1 = new CodeTypeDeclaration("TryCatchTest");

        // Defines a method that throws an exception of type System.ApplicationException.
        CodeMemberMethod method1 = new CodeMemberMethod();
        method1.Name = "ThrowApplicationException";
        method1.Statements.Add( new CodeThrowExceptionStatement( 
            new CodeObjectCreateExpression("System.ApplicationException", new CodePrimitiveExpression("Test Application Exception")) ) );
        type1.Members.Add( method1 );

        // Defines a constructor that calls the ThrowApplicationException method from a try block.
        CodeConstructor constructor1 = new CodeConstructor();
        constructor1.Attributes = MemberAttributes.Public;            
        type1.Members.Add( constructor1 );    
    
        // Defines a try statement that calls the ThrowApplicationException method.
        CodeTryCatchFinallyStatement try1 = new CodeTryCatchFinallyStatement();
        try1.TryStatements.Add( new CodeMethodInvokeExpression( new CodeThisReferenceExpression(), "ThrowApplicationException" ) );
        constructor1.Statements.Add( try1 );                    

        // Defines a catch clause for exceptions of type ApplicationException.
        CodeCatchClause catch1 = new CodeCatchClause("ex", new CodeTypeReference("System.ApplicationException"));
        catch1.Statements.Add( new CodeCommentStatement("Handle any System.ApplicationException here.") );
        try1.CatchClauses.Add( catch1 );
        
        // Defines a catch clause for any remaining unhandled exception types.
        CodeCatchClause catch2 = new CodeCatchClause("ex");
        catch2.Statements.Add( new CodeCommentStatement("Handle any other exception type here.") );
        try1.CatchClauses.Add( catch2 );
    
        // Defines a finally block by adding to the FinallyStatements collection.
        try1.FinallyStatements.Add( new CodeCommentStatement("Handle any finally block statements.") );
    
        // A C# code generator produces the following source code for the preceeding example code:

        //    public class TryCatchTest 
        //    {
        //        
        //        public TryCatchTest() 
        //        {
        //            try 
        //            {
        //                this.ThrowApplicationException();
        //            }
        //            catch (System.ApplicationException ex) 
        //            {
        //                // Handle any System.ApplicationException here.
        //            }
        //            catch (System.Exception ex) 
        //            {
        //                // Handle any other exception type here.
        //            }
        //          finally {
        //                // Handle any finally block statements.
        //            }
        //        }
        //        
        //        private void ThrowApplicationException() 
        //        {
        //            throw new System.ApplicationException("Test Application Exception");
        //        }
        //    }