Question

Hi guys i’m having a problem regarding returning multiple values from a method. I’m using ‘out’ to return other value from a method, here the snippet:

public DataTable ValidateUser(string username, string password, out int result)
{
    try
    {
        //Calls the Data Layer (Base Class)
        if (objDL != null)
        {
            int intRet = 0;
            sqlDT = objDL.ValidateUser(username, password, out intRet);
        }
    }
    catch (Exception ex)
    {
        ErrorHandler.Handle(ex);
        OnRaiseErrorOccuredEvent(this, new ErrorEventArgs(ex));
    }
    return sqlDT;
}

then when i compile having a error like this:

“The out parameter ‘return’ must be assigned to before control leaves the current method”

Anyone guys can help me solve this.

Answer 1

That means in all possibilities (inside and outside the if, in the catch), your result variable must be assigned.

The best approach would be to give it a default value at the start of the function:

public DataTable ValidateUser(string username, string password, out int result)
{
    result = 0;
    try
    {
        //Calls the Data Layer (Base Class)
    if (objDL != null)
    {
        int intRet = 0;
        sqlDT = objDL.ValidateUser(username, password, out intRet);
        result = intRet;
    }
//....