DataTable
, DbDataReader
o IEnumerable<SqlDataRecord>
los objetos se pueden usar para completar un parámetro con valores de tabla según el artículo de MSDN Parámetros con valores de tabla en SQL Server 2008 (ADO.NET).
El siguiente ejemplo ilustra el uso de una DataTable
o un IEnumerable<SqlDataRecord>
:
Código SQL :
CREATE TABLE dbo.PageView
(
PageViewID BIGINT NOT NULL CONSTRAINT pkPageView PRIMARY KEY CLUSTERED,
PageViewCount BIGINT NOT NULL
);
CREATE TYPE dbo.PageViewTableType AS TABLE
(
PageViewID BIGINT NOT NULL
);
CREATE PROCEDURE dbo.procMergePageView
@Display dbo.PageViewTableType READONLY
AS
BEGIN
MERGE INTO dbo.PageView AS T
USING @Display AS S
ON T.PageViewID = S.PageViewID
WHEN MATCHED THEN UPDATE SET T.PageViewCount = T.PageViewCount + 1
WHEN NOT MATCHED THEN INSERT VALUES(S.PageViewID, 1);
END
Código C# :
private static void ExecuteProcedure(bool useDataTable,
string connectionString,
IEnumerable<long> ids)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
using (SqlCommand command = connection.CreateCommand())
{
command.CommandText = "dbo.procMergePageView";
command.CommandType = CommandType.StoredProcedure;
SqlParameter parameter;
if (useDataTable) {
parameter = command.Parameters
.AddWithValue("@Display", CreateDataTable(ids));
}
else
{
parameter = command.Parameters
.AddWithValue("@Display", CreateSqlDataRecords(ids));
}
parameter.SqlDbType = SqlDbType.Structured;
parameter.TypeName = "dbo.PageViewTableType";
command.ExecuteNonQuery();
}
}
}
private static DataTable CreateDataTable(IEnumerable<long> ids)
{
DataTable table = new DataTable();
table.Columns.Add("ID", typeof(long));
foreach (long id in ids)
{
table.Rows.Add(id);
}
return table;
}
private static IEnumerable<SqlDataRecord> CreateSqlDataRecords(IEnumerable<long> ids)
{
SqlMetaData[] metaData = new SqlMetaData[1];
metaData[0] = new SqlMetaData("ID", SqlDbType.BigInt);
SqlDataRecord record = new SqlDataRecord(metaData);
foreach (long id in ids)
{
record.SetInt64(0, id);
yield return record;
}
}