GetQueryDescription(String) Method

In This Topic

Gets the QueryDescription object associated with the single (i.e., standalone) table specified by in the currently opened database. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public QueryDescription GetQueryDescription( 
   string tableName
)

Public Overloads Function GetQueryDescription( _
   ByVal tableName As String _
) As QueryDescription

Parameters

tableName: The name of a valid single (i.e., standalone) table. The name can be unqualified or fully qualified. Regardless of whether it is unqualified or fully qualified, it must match one of the "tableNames" returned from the method GetTableNames.

Return Value

The QueryDescription object that fully describes how the underlying database table should be represented as a Table or FeatureClass if it is a spatial table.

Exceptions

Exception	Description
System.ArgumentException	tableName does not currently exist in the database.
ArcGIS.Core.Data.Exceptions.GeodatabaseException	A database-related exception has occurred.

Remarks

A QueryDescription object fully describes how a single database table or one or more database tables (specified by a valid SQL SELECT statement) should be represented as a Table or FeatureClass if the table is spatially enabled. Essentially, there are two flavors of QueryDescription. The first is created by this method. Given a table name (fully qualified or unqualified), it encapsulates all the important properties that describe the underlying single table (i.e., QueryDescription.IsQueryLayer returns false). The second flavor is created by GetQueryDescription(String,String). Given a valid SQL SELECT statement and a query layer name, it encapsulates all the important properties that describe the underlying query layer that is created from one or more tables (i.e., QueryDescription.IsQueryLayer returns true).

Example

Create Default QueryDescription for a Database table and obtain the ArcGIS.Core.Data.Table for the QueryDescription

public async Task DefaultQueryDescription()
{
  await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
  {
    DatabaseConnectionProperties databaseConnectionProperties = 
    new DatabaseConnectionProperties(EnterpriseDatabaseType.SQLServer)
    {
      AuthenticationMode = AuthenticationMode.DBMS,
      Instance = "instance",
      Database = "database",
      User = "user",
      Password = "password"
    };

    using (Database database = new Database(databaseConnectionProperties))
    {
      QueryDescription queryDescription = database.GetQueryDescription("CUSTOMERS");

      using (Table table = database.OpenTable(queryDescription))
      {
        //use table
      }
    }
  });
}

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

Database Class
Database Members
Overload List

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