Question

This is the method i was using to check if there is a match of title in the data table:

public static bool checkBook(DataTable dt, String title)
{
    try
    {
        foreach (DataRow dr in dt.Rows)
        {
            String checktitle = dr["Title"].ToString();
            if (title == checktitle)
                return true;
            else
                return false;
    }
    catch (Exception ex)
    {
        //do something
        return false;
     }
}

but there is a problem, i try to use try and catch but why there is no value return?

Answer 1

there is error because if there is no row in datatable nothing get returned form code so that you need to return false like as below in code ,

Refine code for you :

    public static bool checkBook(DataTable dt, String title)
    {
      bool returnval= false;
      try 
      {

         foreach (DataRow dr in dt.Rows)
            {
                String checktitle = dr["Title"].ToString();
                if (title == checktitle)
                {
                    returnval= true;
                }

        }
    catch (Exception ex)
    {
     //do something
    }
    return returnval;
   }