Cannot Pass Parameter in DbCommand in Entity Framework

Question

I have error when I try to pass parameter to stored procedure using DbCommand

Error returned:

Procedure or function 'Procedure_Name' expects parameter '@TEID', which was not supplied.

These are my procedure parameters:

@PageNumber INT = 1,
@PageSize INT = 50,
@StartTime nvarchar(max) = -1 ,
@EndTime nvarchar(max) = -1 ,
@Month NVARCHAR(2) = -1,
@Year NVARCHAR(4) = -1,
@Day NVARCHAR(2) = -1,
@Hour NVARCHAR(2)=-1,
@TEID nvarchar(max) ,
@IgnoreIdlingTime int=120,
@DrivingTime int=300,--5 minutes by default
@CalculationFactor nvarchar(10)='speed'

My code to execute procedure and pass parameters:

using (var context = new GPSModel())
{
    context.Database.Initialize(force: false);

    // Create a SQL command to execute the stored procedure
    var cmd = context.Database.Connection.CreateCommand();
    cmd.CommandText = "Procedure_Name";

    DbParameter TEIDParam = cmd.CreateParameter();
    TEIDParam.ParameterName = "@TEID";
    TEIDParam.DbType = System.Data.DbType.String;
    TEIDParam.Direction = ParameterDirection.Input;
    TEIDParam.Value = TEID;
    cmd.Parameters.Add(TEIDParam);

    context.Database.Connection.Open();

    var reader = cmd.ExecuteReader();
}

I tried to remove @ sign and send SqlParameter instead of DbParameter but still I have the same issue.

Is there any other way to do that where my stored procedure is very complex and contains multi sets

Thanks...

Answer 1

您可以使用以下代码来解决错误。我已经添加了cmd.CommandType = CommandType.StoredProcedure;。现在它可以正常工作。

    var cmd = context.Database.Connection.CreateCommand();
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.CommandText = "Procedure_Name";
    DbParameter TEIDParam = cmd.CreateParameter();
    TEIDParam.ParameterName = "@TEID";
    TEIDParam.DbType = System.Data.DbType.String;
    TEIDParam.Direction = ParameterDirection.Input;
    TEIDParam.Value = TEID;
    cmd.Parameters.Add(TEIDParam);

当您使用存储过程时，您必须将CommandType属性设置为StoredProcedure，然后您应该将CommandText属性设置为存储过程的名称。当您调用其中一种方法时，该命令会执行此存储过程Execute。