C＃Ole.DB錯誤

Question

我正在C＃中創建一個程序，以幫助跟蹤我的所有信息，而不是爲我的DND類型遊戲寫下它。我能插入和刪除新玩家沒有任何問題，但是當涉及到更新玩家這是我得到的錯誤

「查詢表達式中的語法錯誤（缺少運算符）'@ newPlayerName playerLevel = @newPlayerLevel heroID = @ newHeroId playerInventoryID = @newPlayerInventoryID campaignID = @newCampaignID'。「

，這裏是我的更新方法

public static Boolean UpdatePlayer(Player oldPlayer, 
     Player newPlayer) 
    { 
     OleDbConnection connection = DBConnection.GetConnection(); 
     OleDbCommand command; 
     string statement = 
      "UPDATE Player SET " + 
      "playerName = @newPlayerName " + 
      "playerLevel = @newPlayerLevel " + 
      "heroID = @newHeroId " + 
      "playerInventoryID = @newPlayerInventoryID " + 
      "campaignID = @newCampaignID " + 
      "WHERE ID = @oldID " + 
      "AND playerName = @oldPlayerName " + 
      "AND playerLevel = @oldPlayerLevel " + 
      "AND heroID = @oldHeroID " + 
      "AND playerInventoryID = @oldPlayerInventoryID " + 
      "AND campaignID = @oldCampaignID "; 

     command = new OleDbCommand(statement, connection); 
     command.Parameters.AddWithValue("@newPlayerName", newPlayer.PlayerName); 
     command.Parameters.AddWithValue("@newPlayerLevel", newPlayer.Level); 
     command.Parameters.AddWithValue("@newHeroID", newPlayer.HeroID); 
     command.Parameters.AddWithValue("@newPlayerInventoryID", newPlayer.PlayerInventoryID); 
     command.Parameters.AddWithValue("@newCampaignID", newPlayer.CampaignID); 
     command.Parameters.AddWithValue("@oldID", oldPlayer.ID); 
     command.Parameters.AddWithValue("@oldPlayerName", oldPlayer.PlayerName); 
     command.Parameters.AddWithValue("@oldPlayerLevel", oldPlayer.Level); 
     command.Parameters.AddWithValue("@oldHeroID", oldPlayer.HeroID); 
     command.Parameters.AddWithValue("@oldPlayerInventoryID", oldPlayer.PlayerInventoryID); 
     command.Parameters.AddWithValue("@oldCampaignID", oldPlayer.CampaignID); 

     try 
     { 
      connection.Open(); 
      int count = command.ExecuteNonQuery(); 
      if (count > 0) 
       return true; 
      else 
       return false; 
     } 
     catch (OleDbException e) 
     { 
      throw e; 
     } 
     finally 
     { 
      connection.Close(); 
     } 
    } 

代碼這裏是正在調用該函數的代碼

private void SavePlayers() 
    { 
     if (lstPlayers.SelectedIndex > -1) 
     { 
      int parsedInt; 
      Player edititedPlayer = new Player(); 
      edititedPlayer.PlayerName = txtPlayerName.Text; 
      edititedPlayer.HeroID = 
       heroes[cboHero.SelectedIndex].ID; 
      edititedPlayer.CampaignID = 
       campaigns[lstCampaigns.SelectedIndex].ID; 
      edititedPlayer.ID = players[lstPlayers.SelectedIndex].ID; 
      edititedPlayer.PlayerInventoryID = 
       players[lstPlayers.SelectedIndex].PlayerInventoryID; 
      if (Int32.TryParse(txtPlayerLevel.Text, out parsedInt)) 
      { 
       edititedPlayer.Level = parsedInt; 
       PlayerDB.UpdatePlayer((Player)lstPlayers.SelectedItem, 
        edititedPlayer);          
      } 
     } 

Answer 1

你丟失了所有的字段之間的逗號更新

string statement = 
     "UPDATE Player SET " + 
     "playerName = @newPlayerName, " + 
     "playerLevel = @newPlayerLevel, " + 
     "heroID = @newHeroId, " + 
     "playerInventoryID = @newPlayerInventoryID, " + 
     "campaignID = @newCampaignID " + 
     "WHERE ID = @oldID " + 
     "AND playerName = @oldPlayerName " + 
     "AND playerLevel = @oldPlayerLevel " + 
     "AND heroID = @oldHeroID " + 
     "AND playerInventoryID = @oldPlayerInventoryID " + 
     "AND campaignID = @oldCampaignID "; 

Answer 2

添加逗號

string statement = 
    "UPDATE Player SET " + 
    "playerName = @newPlayerName, " + 
    "playerLevel = @newPlayerLevel, " + 
    "heroID = @newHeroId, " + 
    "playerInventoryID = @newPlayerInventoryID, " + 
    "campaignID = @newCampaignID " + 
    "WHERE ID = @oldID " + 
    "AND playerName = @oldPlayerName " + 
    "AND playerLevel = @oldPlayerLevel " + 
    "AND heroID = @oldHeroID " + 
    "AND playerInventoryID = @oldPlayerInventoryID " + 
    "AND campaignID = @oldCampaignID ";