May 2004
Intermediate to advanced
888 pages
22h 31m
English
Content preview from Delphi for .NET Developer’s Guide
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Using DataReader to Retrieve Schema Information
The DataReader can be used to retrieve schema information using the SqlDataReader.GetSchemaTable() method. This method returns a DataTable that is populated with information about a resultset’s columns. Therefore, each row in this schema resultset represents a column in the actual resultset. The schema row contains information about the column, such as its name, uniqueness, data type, and more. Listing 19.11 illustrates using this method.
Listing 19.11. Retrieving Schema Information
1: program schemaquery; 2: 3: {$APPTYPE CONSOLE} 4: 5: {%DotNetAssemblyCompiler 'C:\windows\microsoft.net\framework\v1.1.4322\System.Data.dll'} 6: 7: uses 8: SysUtils, 9: System.Data, 10: System.Data.SqlClient, 11: System.Collections; ... |
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