如何使用 ADO.NET 将表值参数传递给存储过程?
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5 回答
78
在 SQL Server 中创建类型:
CREATE TYPE [dbo].[MyDataType] As Table ( ID INT, Name NVARCHAR(50) )
创建程序:
CREATE PROCEDURE [dbo].[MyProcedure] ( @myData As [dbo].[MyDataType] Readonly ) AS BEGIN SELECT * FROM @myData END
在 C# 中创建数据表:
DataTable myDataTable = new DataTable("MyDataType"); myDataTable.Columns.Add("Name", typeof(string)); myDataTable.Columns.Add("Id", typeof(Int32)); myDataTable.Rows.Add("XYZ", 1); myDataTable.Rows.Add("ABC", 2);
创建 SQL 参数:
SqlParameter parameter = new SqlParameter(); parameter.ParameterName = "@myData"; parameter.SqlDbType = System.Data.SqlDbType.Structured; parameter.Value = myDataTable; command.Parameters.Add(parameter);
于 2012-05-02T07:49:45.917 回答
18
我试过这个并收到异常:
表类型参数“@MyDataType”必须具有有效的类型名称。
我必须设置 SqlParameter 的“TypeName”属性:
parameter.TypeName = "MyDataType";
于 2014-04-08T21:30:12.983 回答
0
这个问题是How to pass table value parameters to stored procedure from .net code的副本。请参阅该问题以获取说明使用 aDataTable
或 an的示例IEnumerable<SqlDataRecord>
。
于 2012-05-28T05:16:28.893 回答
0
对于多语种的人来说,节目有点晚了:
a) tsql 上的其他地方
--- create a vector data type
CREATE TYPE [dbo].[ItemList] AS TABLE([Item] [varchar](255) NULL)
b)
Dim Invoices As New DataTable("dbo.ItemList") 'table name is irrelevant
Invoices.Columns.Add("Invoice", GetType(String))
...
With .SqlCommand.Parameters
.Clear()
.Add(New Data.SqlClient.SqlParameter() With {
.SqlDbType = Data.SqlDbType.Structured,
.Direction = Data.ParameterDirection.Input,
.ParameterName = "@Invoices",
.TypeName = "dbo.ItemList",
.Value = Invoices})
End With
...
' using store procedure
.CommandText = "SELECT * FROM dbo.rpt(@invoices) "
' or direct reference is a select
.CommandText = "SELECT * FROM dbo.invoicedata" +
"where ((select count(*) from @invoices) = 0 or "+
"InvoiceNumber in (select distinct * from @Invoices))
于 2019-10-23T06:36:44.213 回答
-6
您可以使用 Exec 作为前缀
using( SqlConnection con = new SqlConnection( "Server=.;database=employee;user=sa;password=12345" ) )
{
SqlCommand cmd = new SqlCommand( " exec ('drop table '+@tab)" , con );
cmd.Parameters.AddWithValue( "@tab" ,"Employee" );
con.Open( );
cmd.ExecuteNonQuery( );
}
于 2014-04-30T12:46:49.613 回答