企业库中用户定义的SQL类型等效

Question

I'm trying to pass parameter which is a table type in SQL Server. I'm unable to find compatible c# type.

I'm passing multiple parameters to stored procedure and one of the parameter is user defined type in SQL.

Database Connection = new SqlDatabase(ConnectionString);
DbCommand Cmd= Connection.GetStoredProcCommand("ProcedureName");
..................
Connection.AddInParameter(Cmd, "@custom", DbType.Object, custom);

Stored procedure looks like this:

ALTER PROCEDURE [dbo].[ProcedureName]
  @custom dbo.CstmType READONLY 
AS

This code is throwing following error :

The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Parameter 6 ("@custom"): Data type 0x62 (sql_variant) has an invalid type for type-specific metadata

I'm tired on finding an answer to this question on internet. Can somebody please provide fruitful suggestion how to get ride of this error and what should be the appropriate datatype?

Answer 1

In your C# code, create DataTable with same fields you have added in your user define table type. Such as,

DataTable dt = new DataTable();
dt.Columns.Add("column1");
dt.Columns.Add("column2");

After that, insert data in this table,like,

dt.Rows.Add(new Object[]{ value1,value2 });

Add parameter in procedure call like below,

SqlCommand cmd = new SqlCommand("ProcedureName", con)
cmd.CommandType = CommandType.StoredProcedure;
var List = new SqlParameter("@custom", SqlDbType.Structured);
List.TypeName = "CstmType";
List.Value = dt;
cmd.Parameters.Add(List);

In your stored procedure, add parameters for user defined table type

@custom dbo.CstmType READONLY