与命名参数

Question

public void UpdateRegistration(User userModel) 
    { 
     using (IDbConnection connection = BaseRepository.OpenConnection()) 
     { 
      string query = "UPDATE [dbo].[TBUser] " + 
       "(CreatedBy, CreatedDate, ModifiedBy, ModifiedDate) VALUES " + 
       "(@CreatedBy, @CreatedDate, @ModifiedBy, @ModifiedDate) WHERE " + 
       "UserId = @UserId;"; 
      connection.Execute(query, userModel); 
     } 
    } 

SQL update语句我得到下面的异常，而它运行

<Message>An error has occurred.</Message> 
<ExceptionMessage>Incorrect syntax near '('.</ExceptionMessage> 
<ExceptionType>System.Data.SqlClient.SqlException</ExceptionType> 

的usermodel了所有与之相关联的所有属性。

Answer 1

语法

UPDATE [table] 
SET [field] = Value 
WHERE .... 

见http://technet.microsoft.com/en-us/library/ms177523.aspx

所以您的查询应该是

UPDATE [dbo].[TBUser] 
SET CreatedBy = @CreatedBy, 
    CreatedDate = @CreatedDate, 
    ModifiedBy = @ModifiedBy, 
    ModifiedDate = @ModifiedDate 
WHERE UserId = @UserId;