not all code paths return a value: array in c#

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I am new to c#. Struggling with printing Array values. Throwing error "not all code paths return a value". Pls help me. Below is the code. Im calling this class from aspx file. Want to print in my web page. Thanks in advance.

C#

public class ArrayExample
{
    int[,] myTable = new int[2, 3];
    public ArrayExample()
	{
		//
		// TODO: Add constructor logic here
		//
        myTable[0, 0] = 1;
        myTable[0, 1] = 2;
        myTable[0, 2] = 3;
        myTable[1, 0] = 4;
        myTable[1, 1] = 5;
        myTable[1, 2] = 6;
	}
    public int CallArray()
    {
        for (int row = 0; row < myTable.GetLength(0); row++)
        {
            for (int col = 0; col < myTable.GetLength(1); col++)
            {
                return myTable[row,col];
                
            }
        }
    }

}

Im calling this class from by Aspx.cs file.

C#

protected void btnArray_Click(object sender, EventArgs e)
   {
       ArrayExample aex = new ArrayExample();
       Response.Write(aex.CallArray());
   }

i want to print this in array format in my web page

Posted 29-Dec-12 17:28pm

BalajiJayaram

Updated 29-Dec-12 17:45pm

v2

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Jibesh · Answer 1 · 2012-12-29T17:33:00

Solution 1

The reason for this compiler error is what if myTable.Legth returns zero? program execution will not go inside the loop and its not possible to know what value to return.

change your code like below

C#

public int CallArray()
 {
     for (int row = 0; row < myTable.GetLength(0); row++)
     {
         for (int col = 0; col < myTable.GetLength(1); col++)
         {
             return myTable[row,col];

         }
     }
return -1;// you can treat this as error condition or array is empty 
 }

Posted 29-Dec-12 17:33pm

Jibesh

Comments

BalajiJayaram 29-Dec-12 23:37pm

Thank for your reply Jibesh. Its printing the first value of array myTable[0,0]. But i want to print all values in the array format. Pls suggest me the right code. Thanks

Jibesh 29-Dec-12 23:41pm

Ofcourse yes. because you are exiting from the loop for the first iteration itself, to print all the line you need to call the print method inside the loop. can you copy your print code too.

BalajiJayaram 29-Dec-12 23:46pm

Updated my print code. pls do the needful