Question

I am using Visual Studio 2008.

I have created a Winforms application, and I am trying to extract the table name from a SQL statement.

con = new SqlConnection(connString);
String queryString = "Select CUSTOMER_NAME from CUSTOMER_DETAIL";

Is there any function to do so?

Please help me out.

Answer 1

It’s good that you have mentioned Java’s ResultSetMetaData. Quoting that link:

public interface ResultSetMetaData

An object that can be used to get information about the types and
properties of the columns in a ResultSet object.

As for C#, you can get the same information using the DataColumn Class.

DataType Property of DataColumn class can be used to get (and to set) the type of data stored in column, AllowDBNull can be used to get (and set) the value that indicates whether null values are allowed in this column, etc… To get the full list of DataColumn properties follow the link I have posted above.

Sample code (gets column datatype):

SqlConnection con = new SqlConnection(connString);
String queryString = "Select CUSTOMER_NAME from CUSTOMER_DETAIL";
SqlCommand cmd = new SqlCommand(queryString, con);
DataTable myTable = new DataTable();
myTable.Load(cmd.ExecuteReader());
DataColumn column = myTable.Columns[0]; // zero based index of column, alternatively use column name
string typeOfColumn = column.DataType.Name; // or column.DataType.FullName to get the fully qualified name of the System.Type