how to validate textbox combobox and datetimepicker combined in windows application

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Please some one tell me how to validate all text box, combo box and date time pickers at once in windows application

I have tried for single text box, but I don't know how to validate all controls in a single form.
My code to validate one text box control is

C#

private void txtcmpname_Validating(object sender, CancelEventArgs e)
{
	if (((TextBox)sender).Text == "")
	{
		MessageBox.Show("You must enter a ccomplaintname.", "Invalid Input", MessageBoxButtons.OK, MessageBoxIcon.Warning);
		e.Cancel = true;
	}
}

But whenever I added another text box or combo box validation then that is not working properly and a blank record is inserted in the database.

Please provide me the solution

Posted 24-Sep-11 23:43pm

chander_rani

Updated 24-Sep-11 23:51pm

André Kraak

v3

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BillWoodruff · Answer 1 · 2011-09-25T10:58:00

To really understand your question, I'd need to know how the code that updates the database is called ... automatically ? In response to some user action ?

Why can't you use a single class-scoped boolean variable, something like:

private bool IsAllControlsVerified = false;

which is set to 'false' initially, and then reset to 'false after each database update, and then have a function that tests for each control being validated, and, only if all of them are validated, sets this flag to 'true ?

The database update, of course, being allowed to proceed only if this flag if 'true.

Please expand your explanation of what you are trying to do.