消息機(jī)制setobject object reference not set to an instance of an object.怎么解決？
object reference not set to an instance of an object.怎么解決？Object reference not set to an instance of
object reference not set to an instance of an object.怎么解決？
Object reference not set to an instance of a Object
這意味著變量沒有實例化
這意味著在讀取數(shù)據(jù)庫中的數(shù)據(jù)時，軟件不會判斷是否讀取數(shù)據(jù)。當(dāng)它不讀取數(shù)據(jù)時，軟件直接使用未賦值的變量來引起錯誤
詳細(xì)檢查數(shù)據(jù)庫是否安裝錯誤[detailed]