将列表作为 Sql 表类型参数传递

Question

I'm trying to pass the list of my class as DbParameter . Probably the table type is defined in my stored procedure.

Now, I'm not getting how to pass the List<> into the stored procedure as there is table type defined which accepts Tables only.

Here, I'm putting my method.

public static AddCustomer(List<Customer> customer)
{
      List<DbParameter> lstDbParameters = null;

      try
      {
        #region Set the Parameters
        lstDbParameters = new List<DbParameter>();
        SqlParameter dbAcceptedBillDetails = new SqlParameter("@Customers",
                                                             customer);

        dbAcceptedBillDetails.SqlDbType = SqlDbType.Structured;
        lstDbParameters.Add(dbAcceptedBillDetails as DbParameter);
        lstDbParameters.Add(CDDAC.MakeDbParameter(dbProvider,
                                                  "@ErrorMessage",
                                                  DbType.String,
                                                  null,
                                                  500,
                                                  ParameterDirection.Output));
        #endregion

        //Call the static ExecuteNonQuery method.
        CDDAC.ExecuteNonQuery(dbProvider,
                              connectionString,
                              "AddCustomer",
                              CommandType.StoredProcedure,
                              lstDbParameters.ToArray());
      }
      catch (Exception ex)
      {
        throw;
      }
    }

And I'm getting error like this:

Failed to convert parameter value from a List 1 to a IEnumerable 1.

I know i can convert this list into DataTable and then pass it in the stored procedure but it seems time consuming. :(

Answer 1

Finally, i got my answer byself. But during finding, i got that there is no way exist to convert List<> to IEnumerable<> directly.

But this article is very useful to transact data through object or List<Obj>

http://www.c-sharpcorner.com/UploadFile/pchandraker/passing-table-valued-parameter-to-stored-procedu-part-2/

very useful. :)

Answer 2

I know this question a bit old, but I found another way to pass a list to table type parameter by converting list into datatable. So your code can be like this :

public static AddCustomer(DataTable customer)
{
      try
      {
        DbCommand dbcomm = CDDAC.GetStoredProcCommand("name your stored procedure");
        CDDAC.AdInParameter(dbcomm, "@Param", SqlDbType.Structured, customer); //@param is an input parameter from your storedprocedure
        CDDAC.ExecuteNonQuery(dbcomm);
      }
      catch (Exception ex)
      {
        throw;
      }
    }

Just make sure you have created type for data customer in your database.