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Net)Data Grid Viewでの入力チェックはCell Validatingだけではダメの続きとなります。 前回の最後で、「この場合だと、一つでも入力エラーとなれば、正しい値を入れるまで何もできない(フォームを閉じることさえ)ので、実装には工夫が必要」と書きました。 今回はその工夫の1つで、間違った入力をされたら、その行は消すという方法です。 列数が1つとか2つかの場合には有効だと思います。 実際に行を消すのは Row Validated イベントで行っています。 厄介だったのは、Row.

Its not permissible to have the two selected to true, but they can both be false.

In a datagridview (vs2005, VB.net) I have two columns that are checkboxes.

I need to check that only one of the two can be checked.

If the event handler for the Cell Validating event finds that the value is an empty string, the Data Grid View prevents the user from exiting the cell until a non-empty string is entered.

For a complete explanation of this code example, see Walkthrough: Validating Data in the Windows Forms Data Grid View Control.

To copy the code in this topic as a single listing, see How to: Validate Data in the Windows Forms Data Grid View Control.

column, its value is tested for validity by checking that it is not empty.

Cancel = True End If End Sub Private Sub data Grid View1_Cell End Edit(By Val sender As Object, _ By Val e As System. Cell End Edit ' Clear the row error in case the user presses ESC. For more information, see Protecting Connection Information.

Data Grid View Cell Event Args) _ Handles data Grid View1. Using Windows Authentication (also known as integrated security) is a more secure way to control access to a database.

Dim adapter As New Sql Data Adapter(select Command, connection String) Dim data As New Data Table() data. Storing sensitive information, such as a password, within the connection string can affect the security of your application.

Formatted Value で入力値を取得できる。 Data Gride Viewから取得したい場合は Data Grid View.

Text = "Data Grid View validation demo (disallows empty Company Name)" End Sub Private Sub Form1_Load(By Val sender As System. All Cells Except Header) End Sub Private Sub data Grid View1_Cell Validating(By Val sender As Object, _ By Val e As Data Grid View Cell Validating Event Args) _ Handles data Grid View1. Header Text ' Abort validation if cell is not in the Company Name column. Equals("Company Name") Then Return ' Confirm that the cell is not empty.