If a user is tabbing through the form and tabs from the text box, the validating/validated events are fired. Once the value is cached, the next time the user tabs through the box, the validating event will check to see if the _Cache is different from the . If so that is when I would like to raise the validating event to the parent form (as well as the validated event).

I was thinking that the text box could cache the value and compare it to what is listed in the text property. If the _cache is the same, then I don't want to raise the event to the form.

This example requires that a Text Box and Error Provider control have been created on a form.

Creating a resume upload form where user must upload attachment.

Current;//获取当前Row View Customers Row cust Row = current Row View. Customers; //将Text Box的Text属性Binding到table的Customer ID列customer IDText Box.

If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site. Empty #End Region #Region "Overridden methods" Protected Overrides Sub On Click(By Val e As System.Event Args) 'check to see if the control has recently gained focus, if it has then allow the first click to highlight all of the text If Not _First Click Completed Then Me.Data Source = my Binding Source;//将Binding Source绑定到Grid View my Table;//绑定数据到Binding Source 以上图所示数据为例: 1)Data Set:my Data Set 2)Data Table:Parent Table、Child Table、Grand Child Table 3)Relation:FK_Parent_Child、FK_Child_Grand Child //绑定父数据 parent Binding Source. Data Source = parent Binding Source;//绑定到“父Binding Source”,而不是父Table child Binding Source.Data Member = "FK_Child_Grand Child";//绑定到“父-子Relation” //绑定孙子数据。grand Child Binding Source.

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