.NET 获得sql存储过程并返回值

public string RunProcedure(OleDbParameter[] paramInput, OleDbParameter[] paramOutput, string procName)
        {
            int cnt = 0;
            string returnString = "-2";
            try
            {
                String ConnStr = OleDbHelper.GetOleDBConnection();
                using (OleDbConnection connection = new OleDbConnection(ConnStr))

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                OleDbCommand cmd = new OleDbCommand();
                cmd.CommandText = procName;
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Connection = conn;
                for (int i = 0; i < paramInput.Length; i++)
                {
                    cmd.Parameters.Add(paramInput[i]);
                }
                for (int i = 0; i < paramOutput.Length; i++)
                {
                    cmd.Parameters.Add(paramOutput[i]);
                }
                cnt = cmd.ExecuteNonQuery();
                System.Data.OleDb.OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
                DataSet ds = new DataSet();
                adapter.Fill(ds);

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            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
                returnString = "错误标识";
            }
            finally
            {
                if (cnt > 0)
                {
                    for (int i = 0; i < paramOutput.Length; i++)
                    {
                        returnString = paramOutput[i].Value.ToString();
                    }
                }
                this.Close();
            }
            return returnString;
        }

　 　做下解释：

　　1. cnt=cmd.ExecuteNonQuery() 这里cnt是改动的记录数 如果没有修改返回-1

　　2. 如果是output定义的出参的话 在执行完上述语句后用returnString = paramOutput[i].Value.ToString();接收参数。

　　3. 返回结果集，经过测试。

　　　　System.Data.OleDb.OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
　　　　DataSet ds = new DataSet();
　　　　adapter.Fill(ds);

       4. 接受存储过程中return返回的值:

              cmd.Parameters.Add("@return", SqlDbType.Int);
              cmd.Parameters["@return"].Direction = ParameterDirection.ReturnValue;

              cmd.ExecuteNonQuery();
              string returnS=cmd.Parameters["@return"].Value.ToString();