Sql更新表

Question

我正在使用下面的代码来更新用户信息，但我得到错误。任何人都可以指出我出了什么问题。我正在编写用于Web服务的代码。

public string UpdateUser(int uID, string fName, 
      string lName, string password, string emailAddress) 
     { 
      // Create connection object 
      int ix = 0; 
      string rTurn = ""; 
      OleDbConnection oleConn = new OleDbConnection(connString); 
      try 
      { 
       oleConn.Open(); 
       string sql = "UPDATE [User] SET [fName]=@fName, [lName]=@lName, [password]=@password, [emailAddress]=@emailAddress" + "WHERE [ID]=@uID"; 
       OleDbCommand oleComm = new OleDbCommand(sql, oleConn); 

       oleComm.Parameters.Add("@fName", OleDbType.Char).Value = fName; 
       oleComm.Parameters.Add("@lName", OleDbType.Char).Value = lName; 
       oleComm.Parameters.Add("@password", OleDbType.Char).Value = password; 
       oleComm.Parameters.Add("@emailAddress", OleDbType.Char).Value = emailAddress; 
       oleComm.Parameters.Add("@uID", OleDbType.Integer).Value = uID; 

       ix = oleComm.ExecuteNonQuery(); 
       if (ix > 0) 
        rTurn = "User Updated"; 
       else 
        rTurn = "Update Failed"; 
      } 
      catch (Exception ex) 
      { 
       Console.WriteLine(ex.ToString()); 
       rTurn = ex.ToString(); 
      } 
      finally 
      { 
       oleConn.Close(); 
      } 
      return rTurn; 
     } 

错误 * 我收到以下错误，当我尝试更新的用户。 *

<string> 
System.Data.OleDb.OleDbException: Syntax error (missing operator) in query expression '@emailAddressWHERE [ID]=@uID'. 
     at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr) 
     at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult) 
     at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult) 
     at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) 
     at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) 
     at System.Data.OleDb.OleDbCommand.ExecuteNonQuery() 
     at UserManagement.UserRegistration.UpdateUser(Int32 uID, String fName, String lName, String password, String emailAddress) in C:\Users\smartamrit\Desktop\SystemSoftware\UserManagement\UserRegistration.asmx.cs:line 97 
</string> 

Answer 1

前的空间

您需要额外添加前WHERE

string sql = @"UPDATE [User] 
       SET [fName]=@fName, 
        [lName]=@lName, [password]=@password, 
        [emailAddress]=@emailAddress" + " WHERE [ID]=@uID"; 
               ^here 

或者我看不出有任何区别，如果你没有串连它的空间，为什么不这样做直接

string sql = @"UPDATE [User] 
       SET [fName]=@fName, 
        [lName]=@lName, 
        [password]=@password, 
        [emailAddress]=@emailAddress 
       WHERE [ID]=@uID"; 

Answer 2

的错误是不言自明：

'@emailAddressWHERE [ID]=@uID' 

你有@emailAddress和WHERE

Answer 3

之间没有空格，您需要WHERE这里

@emailAddress" + " WHERE 

Answer 4

你需要你的地方开始前添加空间。

您可以按照下面提到的方式编写您的查询。

string sql = "UPDATE [User] SET [fName]=@fName, [lName]=@lName, 
    [password]=@password, [emailAddress]=@emailAddress" +" "+ "WHERE [ID]=@uID";