GetColumnSQLVARIANTToString Method

后续版本的 Microsoft SQL Server 将删除该功能。请避免在新的开发工作中使用该功能，并着手修改当前还在使用该功能的应用程序。

The GetColumnSQLVARIANTToString method converts a sql_variant column to a string and returns its value.

语法

object
.GetColumnSQLVARIANTToString( 
Row
, 
Column
, 
ObjName
)
as String

Parts

• object
  Expression that evaluates to an object in the Applies To list.

• Row
  Long integer that identifies a row by ordinal position.

• Column
  Long integer that identifies a column by ordinal position.

• ObjName
  String that specifies a table or view name.

Prototype (C/C++)

HRESULT GetColumnSQLVARIANTToString(
long lRow, 
long lColumn, 
SQLDMO_LPCSTR ObjName, 
SQLDMO_LPBSTR pRetVal);

注意：
SQL Distributed Management Objects (SQL-DMO) strings are always returned as OLE BSTR objects. A C/C++ application obtains a reference to the string. The application must release the reference using SysFreeString.

备注

GetColumnSQLVARIANTToString can be useful in applications designed to display the contents of sql_variant columns, such as a Web site.

Columns with underlying numeric, decimal, or datetime data types cannot be converted to strings using the GetColumnSQLVARIANTToString method.

注意：
If an application calls GetColumnSQLVARIANTToString on an instance of SQL Server version 7.0, the constant, SQLDMO_E_SQL80ONLY, and the message "This property or method requires Microsoft SQL Server 2000 or later" are returned.

Applies To: