Question

如何使用ADO.Net将表值参数传递给存储过程？

Answer 1

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DataTable ：

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);

Answer 2

我试过这个并收到了例外：

表格类型参数＆＃39; @ MyDataType＆＃39;必须有一个有效的类型名称。

我必须设置＆＃34; TypeName＆＃34; SqlParameter的属性：

parameter.TypeName = "MyDataType";

Answer 3

此问题与How to pass table value parameters to stored procedure from .net code重复。有关使用DataTable或IEnumerable<SqlDataRecord>的示例，请参阅该问题。

Answer 4

对于使用多种语言的人，演出晚了一点：

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))

Answer 5

您可以使用Exec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( );
    }

使用ADO.Net传递表值参数

5 个答案: