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CompareValidator is not working correctly

I would prefer to use the asp.net Validation control as I currently have other validation controls within the same view. I need the error messages to appear in the validation summary.

I have two textboxes and I need to make sure textboxA is a LessThan textbox.

I used CompareValidator and set the following properties:

  • ControlToCompare: textboxB
  • ControlToValidate: textboxA
  • Operator: GreaterThan / Also tried LessThan
  • Type: Date

Here's the problem:

  • When I provide the time in the textbox and go to the textbox. an error is displayed. I thought if the expression would fix this, but it doesnt.

In the Click event for the Update button, I added the following code as I only need it to check if both textboxA / textboxB! = Null.

        if(String.IsNullOrEmpty(textboxB.Text))
        {
            Debug.Write("Valid");
            timeCompareValidator.IsValid = true;    
        }

Thanks in advance for your help.

Clare

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5 answers


I think you need to use CustomValidator and that will still allow you to use your ValidationSummary.

See here:



How do I use CompareValidator for times without dates?

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If you understand correctly, you need to compare two dates.

I found this code in msdn :



DateTime date1 = new DateTime(2009, 8, 1, 0, 0, 0);
DateTime date2 = new DateTime(2009, 8, 1, 12, 0, 0);
int result = DateTime.Compare(date1, date2);
string relationship;

if (result < 0)
   relationship = "is earlier than";
else if (result == 0)
   relationship = "is the same time as";         
else
   relationship = "is later than";

Console.WriteLine("{0} {1} {2}", date1, relationship, date2);
// The example displays the following output:
//    8/1/2009 12:00:00 AM is earlier than 8/1/2009 12:00:00 PM
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You want to try changing the if statement:

if (!string.IsNullOrEmpty(textboxA.Text) && !string.IsNullOrEmpty(textboxB.text))
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If you want to compare two dates or times server side use this solution

DateTime dt1 = Convert.ToDateTime(TextBoxA.Text);
DateTime dt2 = Convert.ToDateTime(TextBoxB.Text);

int result = dt1.CompareTo(dt2)
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I would use CustomValidator ( http://msdn.microsoft.com/en-us/library/9eee01cx(VS.71).aspx ). BTW: Why are you calling the validator directly?

timeCompareValidator.Validate();

Typically validators are evaluated during Page.Validate () which is triggered by each button (unless CausesValidation is set to false)

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