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Form All following code is part of private string last Edited Cell Value; private void dgv Replenish_Cell Begin Edit(object sender, Data Grid View Cell Cancel Event Args e) private void dgv Replenish_Cell Validating(Object sender, Data Grid View Cell Validating Event Args e) private void dgv Replenish_Cell Clicked(object sender, Data Grid View Cell Event Args e) private void dgv Replenish_Cell Formatting(object sender, Data Grid View Cell Formatting Event Args e) private void dgv Replenish_Cell Value Changed(object sender, Data Grid View Cell Event Args e) The truth is, it's really very hard to refactor this code out of the code behind once it's been written like this.

I would suggest that you start writing your tests first, for now at least.

In the implementation of this event, we would have to go through all the rows that have any info on them and perform the validation required, setting the appropiate error messages in the cell.

Hi, Instead of using Error Provider, you can use the Data Grid View built-in functionality A Data Grid View Cell has an Error Text property, you can use it to show the error message.

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datagridview cellvalidating-57datagridview cellvalidating-52

現在、Cell Validatingイベントでセルの入力チェックを行っていたのですが、どうやら Cell Validating だけでチェックしたのではダメっぽいです。 たとえば複数列の Data Grid View で全列Null不可の条件かつ登録ボタンを押下すれば、DBに反映するというような場合、新規行のどっかのセルに値を入れて、そのまま登録ボタンを押下すれば、null値がDBに登録されてしまい、DBがnullを許してないため、例外が発生します。 なので、入力チェックは Cell Validating イベントだけでなく、Row Validating も使ってやる必要ありそうです。 Row Validating なら、ここで全セルをチェックしてやればいいだけですからね。 ということで、簡単なサンプルです。 これは、Cell Validating と、Row Validating で入力チェックを行っています。 Row Validating だけでもいいんでしょうが、こまかい制御をかけさせたいという要件もあると思うので Cell Validating でもチェックさせます。 DBにはMDBを、列IDはオートナンバー型なのでここの値の割り振りはJETエンジンに任せてます。 列name1は文字列、列name2は数値型で、両方とも空値は認めません。 Data Setは下記のようなイメージで作ってます。 .

To validate data to grid cells and rows, we need to use the Validate Cell event, which will be raised by the Kettic Data Grid View when there are any changes to the current cell or when the grid cell loses input focus like.

Before we validate data to grid cell, we need to cancel the Validate Cell event to prevent the users from exiting the cell until entering a valid editor value or cancelling the edit process.

What you have to do is, you handle the Cell Validating event and if fails the validation, you set the error text property, and you get that red error icon to show up in the cell.

The Kettic Data Grid View allows users of the control easily validate data grid cells when data is committed to the data source.




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