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.NET Forum / Windows Forms / WinForm Controls / September 2006Validating input on a control
I have two text boxes on a windows form and each has an associated ErrorProvider. The maximum value of textBox2 must not exceed the value entered into textBox1. I am capturing the 'Leave' event from textBox1 to update the maximum value of textBox2. This works correctly, as the tooltip on textBox2 updates correctly. But, how can I get textBox2 to re-validate so that the error icon appears if the value in textBox2 is greater than its new maximum value. Currently it only validates when textBox2 looses focus. Regards, Dave. Hi Dave, You could re-validate if the value in textBox2 is greater than its new maximum value right after you update the maximum value of textBox2. Hope this helps. Sincerely, Linda Liu Microsoft Online Community Support ================================================== Get notification to my posts through email? Please refer to http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif ications. Note: The MSDN Managed Newsgroup support offering is for non-urgent issues where an initial response from the community or a Microsoft Support Engineer within 1 business day is acceptable. Please note that each follow up response may take approximately 2 business days as the support professional working with you may need further investigation to reach the most efficient resolution. The offering is not appropriate for situations that require urgent, real-time or phone-based interactions or complex project analysis and dump analysis issues. Issues of this nature are best handled working with a dedicated Microsoft Support Engineer by contacting Microsoft Customer Support Services (CSS) at http://msdn.microsoft.com/subscriptions/support/default.aspx. ================================================== This posting is provided "AS IS" with no warranties, and confers no rights. My question was how do I force a control to revalidate? I couldn't see any methods that force a revalidation. Regards, Dave. > Hi Dave, > [quoted text clipped - 26 lines] > > This posting is provided "AS IS" with no warranties, and confers no rights. Hi Dave, Thank you for your prompt response. > My question was how do I force a control to revalidate? Do you mean that you want the Validating event of the textBox2 to be raised? Only when the CausesValidation property of the textBox2 is true and the focus is moving from the textBox2 to another control whose CausesValidation property is also true, the Validating event of the textBox2 will be raised. Actually, I think you could directly call the CausesValidating event handler of the textBox2 to force it to revalidate. Hope this helps. If I misunderstand you or you have any concerns, please feel free to let me know. Sincerely, Linda Liu Microsoft Online Community Support Linda, That works, Thank you. Dave. > Hi Dave, > [quoted text clipped - 17 lines] > Linda Liu > Microsoft Online Community Support Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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