Examples Using .NET Methods

Work with .NET Methods Having Multiple Signatures

To create the NetSample assembly, see Building a .NET Application for MATLAB Examples.

The SampleMethodSignature class defines the three constructors shown in the following table.

 SampleMethodSignature Class

using System;
namespace netdoc
{
    public class SampleMethodSignature
    {
        public SampleMethodSignature ()
        {}
        
        public SampleMethodSignature (double d)
        { myDoubleField = d; }
        
        public SampleMethodSignature (string s)
        { myStringField = s; }

        public int myMethod(string strIn, ref double dbRef, 
					out double dbOut)
        {
            dbRef += dbRef;
            dbOut = 65;
            return 42;
        }

        private Double myDoubleField = 5.5;
        private String myStringField = "hello";
    }
}

Display Function Signature Example

If you have not already loaded the NetSample assembly, type:

NET.addAssembly('c:\work\NetSample.dll')

Create a SampleMethodSignature object obj:

obj = netdoc.SampleMethodSignature;

To see the method signatures, type:

methods(obj, '-full')

Look for the following signatures in the MATLAB output:

netdoc.SampleMethodSignature obj SampleMethodSignature
netdoc.SampleMethodSignature obj SampleMethodSignature(double scalar d)
netdoc.SampleMethodSignature obj SampleMethodSignature(System.String s)

For more information about argument types, see Handling Data Returned from a .NET Object.

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Calling Methods Examples

To create the NetSample assembly, see Building a .NET Application for MATLAB Examples.

The SampleMethods class defines the following methods:

• refTest

• outTest

• paramsTest

 SampleMethods Class

using System;
namespace netdoc
{
    public class SampleMethods
    {
        //test ref keyword
        public void refTest(ref double db1)
        {
            db1 = db1 * 2;
        }

        //test out keyword
        public void outTest(double db1, out double db2)
        {
            db1 = db1 * 2.35;
            db2 = db1;
        }

        //test params keyword
        public int paramsTest(params int[] num)
        {
            int total = 0;
            foreach (int i in num)
            {
                total = total + i;
            }
            return total;
        }
    }
}

Load the NetSample assembly:

NET.addAssembly('c:\work\NetSample.dll')

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Call .NET Methods That Use the out Keyword

To capture the output from a method using the out keyword, use the outTest method. Its function signature is shown in the following table.

Return Type	Name	Arguments
double scalar db2	outTest	( netdoc.SampleMethods this, double scalar db1)

Type:

obj = netdoc.SampleMethods;
db3 = outTest(obj,6)

db3 =
   14.1000

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Call .NET Methods That Use the ref Keyword

To capture the output from a method using the ref keyword, use the refTest method. Its function signature is shown in the following table.

Return Type	Name	Arguments
double scalar db1	refTest	( netdoc.SampleMethods this, double scalar db1)

Type:

obj = netdoc.SampleMethods;
db4 = refTest(obj,6)

db4 =
    12

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Call .NET Methods That Use the params Keyword

To call a method using a params keyword, use the paramsTest method. The function signature is shown in the following table.

Return Type	Name	Arguments
int32 scalar RetVal	paramsTest	( netdoc.SampleMethods this, System.Int32[] num)

Type:

obj = netdoc.SampleMethods;
mat  = [1, 2, 3, 4, 5, 6];
db5 = paramsTest(obj,mat)

db5 =
          21

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MATLAB Does Not Display Protected Properties or Fields

Call .NET Methods with Optional Arguments

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