In this article we will discuss, how to use ExecuteScalar () method in ASP.Net c#. when we want o return a single value by using ExecuteScalar () method. Below example brief about returning total number of employees.
Example:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//Create the connection object
SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["ShoppingZone"].ConnectionString) ;
try
{
//Create aninstance of SqlCommand class, specifying the T-SQL command
//that we want toexecute, and the connection object.
SqlCommand cmd = new SqlCommand("Select Count(EmployeeId) from Employee", connection);
connection.Open();
//As the T-SQLstatement that we want to execute return a single value,
//use ExecuteScalar()method of the command object.
//Since thereturn type of ExecuteScalar() is object, we are type casting to int datatype
int TotalRows = (int)cmd.ExecuteScalar();
Response.Write("Totalemployees = " +TotalRows.ToString());
}
catch (Exception ex)
{
// HandleExceptions, if any
Response.Write(ex.ToString());
}
finally
{
// The finallyblock is guarenteed to execute even if there is an exception.
// This ensures connections are always properlyclosed.
connection.Close();
}
}
}