ObjectQuery.GetResultType 方法

定義

命名空間:

System.Data.Objects

組件:

System.Data.Entity.dll

傳回查詢結果類型的相關信息。

public:
 System::Data::Metadata::Edm::TypeUsage ^ GetResultType();

public System.Data.Metadata.Edm.TypeUsage GetResultType();

member this.GetResultType : unit -> System.Data.Metadata.Edm.TypeUsage

Public Function GetResultType () As TypeUsage

傳回

TypeUsage

一個 TypeUsage 包含查詢結果類型資訊的值。

範例

此範例會建立 的 ，ObjectQuery<T>DbDataRecord並用GetResultType來判斷回傳的型別是否代表一列。

using (AdventureWorksEntities context =
    new AdventureWorksEntities())
{
    string queryString = @"SELECT VALUE product "
    + "FROM AdventureWorksEntities.Products AS product";
    ObjectQuery<DbDataRecord> query =
        new ObjectQuery<DbDataRecord>
            (queryString, context);

    TypeUsage type = query.GetResultType();
    if (type.EdmType is RowType)
    {
        RowType row = type.EdmType as RowType;
        foreach (EdmProperty column in row.Properties)
            Console.WriteLine("{0}", column.Name);
    }
}