Question

这个web服务几乎从VB转换为C＃，除了我在DataRow arow对象上显示如下所示的错误，当我在下面的foreach语句中使用它时，用DataSet对象填充结果类...任何想法？？

错误：名为'arow'的局部变量不能在此范围内声明，因为它会给'arow'赋予不同的含义，'arow'已在'父或当前'范围内用于表示其他内容

        using System;
        using System.Web;
        using System.Collections;
        using System.Web.Services;
        using System.Web.Services.Protocols;
        using System.Data;
        using System.Data.SqlClient;
        using System.Configuration;
        /// <summary>
        /// Summary description for VTResults
        /// </summary>
        [WebService(Namespace = "http://velocitytrading.net/ResultsVT.aspx")]
        [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
        public class VTResults : System.Web.Services.WebService {
            public class Results {
                public string Ticker;
                public string BuyDate;
                public string Buy;
                public string SellDate;
                public string Sell;
                public string Profit;
                public string Period;
            }
            [WebMethod]
            public Results[] GetResults() {
                string conn = 
                ConfigurationManager.ConnectionStrings["LocalSqlServer"].ConnectionString;
                SqlConnection myconn = new SqlConnection(conn);
                SqlCommand mycomm = new SqlCommand();
                SqlDataAdapter myda = new SqlDataAdapter();
                DataSet myds = new DataSet();

                mycomm.CommandType = CommandType.StoredProcedure;
                mycomm.Connection = myconn;
                mycomm.CommandText = "dbo.Results";

                myconn.Open();
                myda.SelectCommand = mycomm;
                myda.Fill(myds);
                myconn.Close();
                myconn.Dispose();

                int i = 0;

                Results[] dts = new Results[myds.Tables[0].Rows.Count];
                DataRow arow;

                foreach(DataRow arow ** in myds.Tables[0].Rows)
                {
                    dts[i] = new Results();
                    dts[i].Ticker = arow["Ticker"].ToString();
                    dts[i].BuyDate = arow["BuyDate"].ToString();
                    dts[1].Buy = arow["Buy"].ToString();
                    dts[i].SellDate = arow["SellDate"].ToString();
                    dts[i].Sell = arow["Sell"].ToString();
                    dts[i].Profit = arow["Profit"].ToString();
                    dts[i].Period = arow["Period"].ToString();
                    i+=1;
                }
                return dts;
            }    
        }

           ** ERROR ON THIS 'AROW' OBJECT

Answer 1

aRow被宣布两次，一次在foreach，另一次在其上方。删除foreach上方的DataRow aRow，你应该很好。

仍然有问题将VB Web服务转换为C＃....需要帮助

1 个答案: