SqlCommand read one value
I have a problem with the value returned from
SqlCommand, I have this code:
string sqlSelect = "Select TOP 1 Quotation.SentToSupp as SentToSupp FROM Quotation JOIN Notifications ON Quotation.QuotationId = QuotationID "; SqlCommand Comm = new SqlCommand(sqlSelect, this.Connection);
sqlSelect query selects the first
DateTime value. When I call to
SqlCommand I want to get this value (just one value). I add the query and my connection fine.
But I don’t know how to get my
DateTime value… Must to use something like
Thank you in advance!!
2 Solutions collect form web for “SqlCommand read one value”
Use SqlCommand.ExecuteScalar method – Executes the query, and returns the first column of the first row in the result set returned by the query. Additional columns or rows are ignored.
ExecuteReader works but more objects and more code are required – (An
SqlDataReader, call to Read and Extract value). Instead you could simply use the
ExecuteScalar method of the
SqlCommand object (It returns just the first column of the first row of the resultset)
string sqlSelect = "Select TOP 1 Quotation.SentToSupp as SentToSupp FROM ...."; SqlCommand Comm = new SqlCommand(sqlSelect, this.Connection); object result = Comm.ExecuteScalar(); if(result != null) DateTime dtResult = Convert.ToDateTime(result);
Just pay attention to the fact that
ExecuteScalar could return a
null value if, for some reason, there is no record in the result returned