c# unable to cast object of type 'system.int16[*]' to type 'system.Int16[]'

Question

I am reading the values from plc tags

public void synch_read() //reads device
{
    Array values;
    Array errors;
    object qualities = new object(); //opc server will store the quality of the item 
    object timestamps = new object(); //store the timestamp of the read

    //read directly from device
    oGroup.SyncRead((short)OPCAutomation.OPCDataSource.OPCDevice, 2, ref handles, out values, out errors, out qualities, out timestamps);

     String abcd = (Int16[])qualities.ToString();
}

In this line

String abcd = ((Int16[])qualities).ToString();

I am getting the error

unable to cast object of type 'system.int16[*]' to type 'system.Int16[]'

How can I solve this error?

EDIT

I tried

Int16[] abcd = (Int16[2])qualities;

error ; expected

You're casting to a string, then an `Int16[]` then assigning that value to a string?? — Steve, Mar 10 '16 at 06:25
`((Int16[])qualities).ToString()` too giving the same error! — Harshit, Mar 10 '16 at 06:27

score 2 · Accepted Answer · edited May 23 '17 at 11:50

2

The system.int16[*] is a multidimensional array, not a single dimensional array.

Array array = (Array)qualities;
int dimensions = array.Rank;

If dimensions is 2, then it is a int[,]. If it is 3 it is int[,,] and so on.

For iterating the array with foreach see for example https://stackoverflow.com/a/2893367/613130

edited May 23 '17 at 11:50

Community

1
1

answered Mar 10 '16 at 06:30

xanatos

109,618
12
197
280

c# unable to cast object of type 'system.int16[*]' to type 'system.Int16[]'

1 Answers1