WinForm Column cannot be added because its CellType property is null.
在Winform DatatGridView 控件中綁定了一個模型的屬性，結果在生成窗口時，發生錯誤，異常信息以下 ：數據庫
Column cannot be added because its CellType property is null.
at System.Windows.Forms.DataGridView.OnAddingColumn(DataGridViewColumn dataGridViewColumn)
at System.Windows.Forms.DataGridViewColumnCollection.Add(DataGridViewColumn dataGridViewColumn)
at System.Windows.Forms.DataGridView.CorrectColumnFrozenStates(DataGridViewColumn[] dataGridViewColumns)
at System.Windows.Forms.DataGridView.OnAddingColumns(DataGridViewColumn[] dataGridViewColumns)
at System.Windows.Forms.DataGridViewColumnCollection.AddRange(DataGridViewColumn[] dataGridViewColumns)orm
找了好半天才找出問題的緣由，綁定的屬性在數據庫表中不存在的列名it
解決方案以下 ：io
1. 綁定的字段必定要與數據庫表中的列的字段名相同 form
2. 若是是模型，這個模型的屬性字段在數據庫中沒有，那就不用把屬性寫在datagridView 的列中，在設置datasource 後，直接設置列的可見 性grid
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- 1. com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'id' cannot be n
- 2. principal argument cannot be null
- 3. Connection cannot be null when 'hibernate.dialect'
- 4. Cannot publish to the server because it is missing its runtime environment.
- 5. A run cannot be made because there is no vehicle solver DLL file in the simfile.
- 6. [vscode]yarn cannot be loaded because run
- 7. Browser cannot find PAC because wpad hostname cannot be resolved
- 8. Cannot read property 'appendChild' of null
- 9. Cannot read property 'addEventListener' of null
- 10. TypeError: Cannot read property 'map' of null