附近的語法不正確（SQL Update命令）

Question

看起來是一個簡單的語法錯誤，但需要幫助。

protected void editback_Click(object sender, EventArgs e) 
{ 
    String EditStoryID = DropDownList3.SelectedItem.Value; 
    String EditProjectID = DropDownList1.SelectedItem.Value; 
    String EditRequirement = TextBoxBacklog.Text; 
    String EditLock = "0"; 

    String connectionString = WebConfigurationManager.ConnectionStrings["ScrumString"].ConnectionString; 
    SqlConnection myConnection = new SqlConnection(connectionString); 


    myConnection.Open(); 
    String query = "UPDATE product_backlog SET (project_id=@project_id,user_story=@user_story,is_locked=@is_locked) WHERE project_backlog.id = (@id)"; 

    SqlCommand commandEdit = new SqlCommand(query, myConnection); 
    commandEdit.Parameters.AddWithValue("@project_id", EditProjectID); 
    commandEdit.Parameters.AddWithValue("@id", EditStoryID); 
    commandEdit.Parameters.AddWithValue("@user_story", EditRequirement); 
    commandEdit.Parameters.AddWithValue("@is_locked", EditLock); 

    commandEdit.ExecuteNonQuery(); 

    Page.Response.Redirect(Page.Request.Url.ToString(), true); 

    Labelsuccess.Text = "User story has been updated"; 
    TextBoxBacklog.Text = ""; 
} 

Answer 1

的set條款不應該用括號包圍：

UPDATE product_backlog 
    SET project_id = @project_id, 
     user_story = @user_story, 
     is_locked = @is_locked 
    WHERE project_backlog.id = (@id); 

Answer 2

您必須在SET語句後刪除括號。 他們的WHERE語句後除外但SET必須是沒有的，即使你有超過1場要更新

UPDATE your_table SET key=@value WHERE id = (@id)