C＃Web開發人員網絡服務

Question

因此，我正在做一個網站作爲大學項目的一部分在C＃Web開發人員，我得到這個錯誤，這是Web服務，它已連接到數據庫我似乎無法找到錯誤：

**Error 1 Type or namespace definition, or end-of-file expected 
Source Error: 
Line 278:  } 
Line 279: } 
Line 280:}** 

現在我可以從哪裏出發？刪除它會擾亂整個網站，並添加另一個支架無濟於事。

using System; 
using System.Linq; 
using System.Web; 
using System.Web.Services; 
using System.Collections; 
using System.Data; 
using System.Data.OleDb; 
using System.Web.Services.Protocols; 
using System.Xml.Linq; 

    [WebService(Namespace = "http://tempuri.org/")] 

public class WebService : System.Web.Services.WebService 
    { 

    // Connection is initialized 
     OleDbConnection conn; 
     OleDbDataReader dbReader; 

    private void ConnectToDatabase() 
    { 
     // Creates a connection to the database 
     conn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0; Data Source=" + Server.MapPath("App_Data\\Sports Car Auction Database.accdb")); 

     // Opens the connection 
     conn.Open(); 
    } 

    private void DisconnectDatabase() 
    { 
     // The connection is closed 
     conn.Close(); 
    } 

    [WebMethod] 
    public string Login(string userName) 
    { 
     // Connects to the database 
     ConnectToDatabase(); 

     try 
     { 
      OleDbCommand cmd = conn.CreateCommand(); 
      cmd.CommandText = ("Select Password FROM [Buyer Information] WHERE UserName = '" + userName + "'"); 

      dbReader = cmd.ExecuteReader(); 
      dbReader.Read(); 

      // The result is read from the datareader and returned to the calling method 
      string result = (string)dbReader["Password"]; 
      return result; 
     } 
     catch (OleDbException) 
     { 
      // Nothing is returned if there are exceptions 
      return null; 
     } 
    } 

    [WebMethod] 
    public DataSet ForgetPass(string userName) 
    { 
     try 
     { 
      // Connect to database 
      ConnectToDatabase(); 

      // Info from the database is selected via the data adapter 
      OleDbDataAdapter adapter = new OleDbDataAdapter(@"SELECT [Secret Question], [Answer] From [Buyer Information] Where [UserName] = '" + userName + "'", conn); 

      // Dataset stores results 
      DataSet ds = new DataSet(); 
      adapter.Fill(ds); 

      // Dataset is returned to calling method 
      return ds; 
     } 
     catch 
     { 
      // Nothing is returned if there are exceptions 
      return null; 
     } 
    } 

    [WebMethod] 
     // Method defines what will be recieved from ChangePassword.aspx 
     public void ChangePass(string Pass, string userName) 
     { 
      // Connects to the database 
      ConnectToDatabase(); 

      // Values in the database are updated 
      OleDbCommand cmd = conn.CreateCommand(); 
      cmd.CommandText = (@"UPDATE [Buyer Information] SET [Password] = '" + Pass + "' WHERE UserName = '" + userName + "'"); 
      cmd.ExecuteNonQuery(); 

      // The connection is closed 
      DisconnectDatabase(); 
     } 

     [WebMethod] 
     // Method define what values will be recieved form register.aspx 
     public void RegisterCustomer(string UserName, string Address, string Tel, string Email, string Ques, string Ans, string Pass) 
     { 
      // Connects to thedatabase 
      ConnectToDatabase(); 

      // Values are inserted into the database 
      OleDbCommand cmd = conn.CreateCommand(); 
      cmd.CommandText = @"INSERT INTO [Buyer Information] ([UserName], [Address], [Telephone], [Email], [Password], [Secret Question], [Answer]) VALUES ('" + UserName + "', '" + Address + "', '" + Tel + "', '" + Email + "', '" + Pass + "', '" + Ques + "', '" + Ans + "')"; 

      cmd.ExecuteNonQuery(); 

      // The connection is closed 
      DisconnectDatabase(); 
     } 

     [WebMethod] 
     public DataSet ViewDetails(string userName) 
     { 
      try 
      { 
       // Connects to the database 
       ConnectToDatabase(); 

       // The correct data is selected from the database using the data adapter 
       OleDbDataAdapter adapter = new OleDbDataAdapter(@" SELECT Address, Telephone, Email, [Secret Question], Answer FROM [Buyer Information] WHERE UserName = '" + userName + "'", conn); 

       // The sesults are stored in the dataset 
       DataSet ds = new DataSet(); 
       adapter.Fill(ds); 

       // Dataset is returned to the calling method 
       return ds; 
      } 
      catch (OleDbException) 
      { 
       // Nothing is returned if there are exceptions 
       return null; 
      } 
     } 

     [WebMethod] 
     // This defines what values will be recieved from Details.aspx 
     public void UpdateCustomer(string userName, string Address, string Tel, string Email, string Ques, string Ans) 
     { 
      // Connects to the database 
      ConnectToDatabase(); 

      // Updates the database 
      OleDbCommand cmd = new OleDbCommand(@"UPDATE [Buyer Information] SET [UserName] = '" + userName + "', [Address] = '" + Address + "', [Telephone] = '" + Tel + "', [Email] = '" + Email + "', [Secret Question] = '" + Ques + "', [Answer] = '" + Ans + "' WHERE [UserName] = '" + userName + "'", conn); 

      cmd.ExecuteNonQuery(); 

      // The connection is closed 
      DisconnectDatabase(); 
     } 

     [WebMethod] 
     public DataSet SelectItem() 
     { 
      try 
      { 
       ConnectToDatabase(); 

       // Get the model values for the drop down list 
       OleDbDataAdapter da = new OleDbDataAdapter("SELECT Model FROM Car", conn); 

       DataSet ds = new DataSet(); 
       da.Fill(ds, "Model"); 

       return ds; 
      } 
      catch (OleDbException) 
      { 
       // Nothing is returned if there are exceptions 
       return null; 
      } 
     } 

     [WebMethod] 
     public DataSet selectCarInfo(string model) 
     { 
      try 
      { 
       // Connects to the database 
       ConnectToDatabase(); 

       // Info is selected from the database via the data adapter 
       OleDbDataAdapter adapter = new OleDbDataAdapter(@"SELECT [Car Information].carID, [Car Information].Make, [Car Information].Description, [Car Information].[Starting Bid], [Car Information].[Closing Date] FROM [Car Information] WHERE Model = '" + model + "'", conn); 

       // The results are stored in dataset 
       DataSet ds = new DataSet(); 
       adapter.Fill(ds); 

       // Dataset is returned to calling method 
       return ds; 
      } 
      catch 
      { 
       // Nothing is returned if there are exceptions 
       return null; 
      } 
     } 

     [WebMethod] 
     public decimal highestBidVal(int carID) 
     { 
      try 
      { 
       // Connects to the database 
       ConnectToDatabase(); 

       // Selects highestBid to compare to Buyer Informations value 
       OleDbCommand cm = conn.CreateCommand(); 
       cm.CommandText = ("SELECT [Bid Information].HighestBid FROM [Bid Information] WHERE carID = " + carID + ""); 

       dbReader = cm.ExecuteReader(); 
       dbReader.Read(); 

       decimal highestBidValue = (decimal)dbReader["HighestBid"]; 
       return highestBidValue; 
      } 
      catch (OleDbException) 
      { 
       // Nothing is returned if there are exceptions 
       return 0; 
      } 
     } 

     [WebMethod] 
     // Method that defines what will be recieved from AddNewItem.aspx 
     public void AddNewCar(string Make, string Model, string Description, decimal StartingBid, DateTime closeDate, string owner) 
     { 
      ConnectToDatabase(); 

      OleDbCommand cmd = conn.CreateCommand(); 

      // Values are inserted into the database 
      cmd.CommandText = (@" INSERT INTO [Car Information] ([Make], [Model], [Description], [Starting Bid], [Closing Date], [Owner]) VALUES ('" + Make + "', '" + Model + "', '" + Description + "', '" + StartingBid + "', '" + closeDate + "', '" + owner + "')"); 

      cmd.ExecuteNonQuery(); 

      // Closes the connection 
      DisconnectDatabase(); 
     } 

     [WebMethod] 
     // Method that defines what will be recieved from PlaceBid.aspx 
     public void AddNewBid(int carid, string userName, decimal bidValue, 
      DateTime bidingDate) 
     { 
      ConnectToDatabase(); 

      // Values are updated in the database 
      OleDbCommand cmd = new OleDbCommand(@"UPDATE [Bid Information] SET [carID] = '" + carid + "', [UserName] = '" + userName + "', [Highest Bid] = '" + bidValue + "', [Bid Date] = '" + bidingDate + "' WHERE [carID] = " + carid + "", conn); 

      cmd.ExecuteNonQuery(); 

      // The connection is closed 
      DisconnectDatabase(); 
     } 

     [WebMethod] 
     // Method that defines what values will be recieved from Placebid.aspx 
     public void AddBid(int carid, string userName, decimal bidValue, DateTime bidingDate) 
     { 
      ConnectToDatabase(); 

      OleDbCommand cmd = conn.CreateCommand(); 
      // Values are inserted into the database 
      cmd.CommandText = (@"INSERT INTO [Bid Information] ([carID], [UserName], [UserName], [HighestBid], [Biddate]) VALUES ('" + carid + "', '" + userName + "', '" + bidValue + "', '" + bidingDate + "')"); 

      cmd.ExecuteNonQuery(); 

      // Closes the connection 
      DisconnectDatabase(); 
     } 
    } 
} 

Answer 1

最後一個右括號似乎是匹配命名空間的那個。刪除它應該做到這一點。

你可以嘗試format your code control-k-d。如果它有效，那麼你的括號（和它們的數量）匹配。

如果仍然出現錯誤，則表示您的代碼中存在更多錯誤。您可能確實缺少使用指令，但那是另一個錯誤。你確實需要刪除那個閉括號，因爲它沒有開放括號的匹配。