使用C#代码获取存储过程返回值

/// <summary>
/// 执行存储过程，返回" 返回值"
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>执行存储过程的返回值</returns>
public static int RunProcedureWithReturn(string storedProcName, IDataParameter[] parameters)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
/// <summary>
/// 创建 SqlCommand 对象实例(用来返回一个整数值) 
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private static SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new SqlParameter("ReturnValue",
SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}

//存储过程
//create proc authors_count @outrus int output
//as
//declare @authors int
//select @authors=count(*) from authors
//set @outrus=@authors
//return @authors
System.Data.SqlClient.SqlConnection sqlcon=new System.Data.SqlClient.SqlConnection("server=(local);database=pubs;uid=sa;pwd=;");
System.Data.SqlClient.SqlCommand sqlcmd=new System.Data.SqlClient.SqlCommand("authors_count",sqlcon);
sqlcmd.CommandType=System.Data.CommandType.StoredProcedure;
// sqlcmd.CommandText="authors_count";
// sqlcmd.Connection=sqlcon;
sqlcmd.Parameters.Add("@rus",System.Data.SqlDbType.Int);
sqlcmd.Parameters.Add("@outrus",System.Data.SqlDbType.Int);
sqlcmd.Parameters[0].Direction=System.Data.ParameterDirection.ReturnValue;
sqlcmd.Parameters[1].Direction=System.Data.ParameterDirection.Output;
sqlcon.Open();
//int res=(int)sqlcmd.ExecuteNonQuery();//此时返回的不是存储过程的返回值，以上只是返回delete,update,insert所影响的行数
sqlcmd.ExecuteNonQuery();
string res=sqlcmd.Parameters[0].Value.ToString();//这样就可以得到存储过程的返回值
sqlcon.Close();
this.label1.Text="存储过程的返回值是:"+res.ToString();//由return 返回
this.label2.Text="存储过程中返回的output值:"+sqlcmd.Parameters[1].Value.ToString();//由output返回