53

如何使用 ADO.NET 将表值参数传递给存储过程?

4

5 回答 5

78
  1. 在 SQL Server 中创建类型

    CREATE TYPE [dbo].[MyDataType] As Table
    (
        ID INT,
        Name NVARCHAR(50)
    )
    
  2. 创建程序

    CREATE PROCEDURE [dbo].[MyProcedure]
    (
        @myData As [dbo].[MyDataType] Readonly
    )
    AS
    
    BEGIN
        SELECT * FROM @myData
    END
    
  3. 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);
    
  4. 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