RegularExpressi onValidator problem

[=?Utf-8?B?Y3VyaW91cw==?=]

I am using a RegularExpressi onValidator to validate a TextBox. I use
"^[\+|-]?[0-9]+(\.[0-9]*)?$" to check for a real number. The control works
fine as long as the user enters something in the TextBox; it does not work if
the user leaves the TextBox blank. Is there a bug in the implementation of
the RegularExpressi onValidator? The above regluar expression should also
catch no entry by the user.

I have added a RequiredFieldVa lidator to solve the problem, but it does not
make sense to have two vlidators for the same textbox: a
RegularExpressi onValidator and a RequiredFieldVa lidator.

Thanks.

--
ASP.NET fan.

[=?Utf-8?B?TWFuaXNoIEJhZm5h?=]

Hi,
If you are using C# 2.0(Visual Studio 2005) and you want to do your
described validation by using single validator control then you can go for
CustomValidator Control because in ASP.NET 2.0 you can set
CustomValidator .ValidateEmptyT ext property to true.By this Custom Validation
will be performed on empty values also.
If you are using C# 1.0 then you can try following code/logic:

public void Validate() {

this.IsValid = true;

bool IsDataPresent = (this.TextBox1. Trim()==string. Empty );

//check here if control requires entry and does not have one

if (IsEntryRequire d && IsDataPresent ) {

this.IsValid = false;

}

if (IsValid && !IsDatapresent && (this.RegExpres sion != null ||
this.RegExpress ion != "")) {

Regex validCheck = new Regex(RegExpres sion);

this.IsValid = validCheck.IsMa tch(this.TextBo x1.Trim());

}

This Validate Function i have found from the internet.
Hope this helps you out.

Thanks and Regards,
Manish Bafna.
MCP and MCTS.

"curious" wrote:

I am using a RegularExpressi onValidator to validate a TextBox. I use
"^[\+|-]?[0-9]+(\.[0-9]*)?$" to check for a real number. The control works
fine as long as the user enters something in the TextBox; it does not work if
the user leaves the TextBox blank. Is there a bug in the implementation of
the RegularExpressi onValidator? The above regluar expression should also
catch no entry by the user.

I have added a RequiredFieldVa lidator to solve the problem, but it does not
make sense to have two vlidators for the same textbox: a
RegularExpressi onValidator and a RequiredFieldVa lidator.

Thanks.

--
ASP.NET fan.

[=?Utf-8?B?Y3VyaW91cw==?=]

Thanks for the response. Your response tells me, indirectly, that
RegularExpressi onValidator control has a bug and does not work properly. The
regular expression that I used ( "^[\+|-]?[0-9]+(\.[0-9]*)?$") works
perfectly on the server side but not on the client side when used in
RegularExpressi onValidator control. There are a number of solutions to my
problem, including the ones you sent me. I just wanted to know if I did not
use the control properly or the control is faulty. Based on your answer it is
the control's problem and we have to use another control or work around it.

--
ASP.NET fan.
"Manish Bafna" wrote:

Hi,
If you are using C# 2.0(Visual Studio 2005) and you want to do your
described validation by using single validator control then you can go for
CustomValidator Control because in ASP.NET 2.0 you can set
CustomValidator .ValidateEmptyT ext property to true.By this Custom Validation
will be performed on empty values also.
If you are using C# 1.0 then you can try following code/logic:

public void Validate() {

this.IsValid = true;

bool IsDataPresent = (this.TextBox1. Trim()==string. Empty );

//check here if control requires entry and does not have one

if (IsEntryRequire d && IsDataPresent ) {

this.IsValid = false;

}

if (IsValid && !IsDatapresent && (this.RegExpres sion != null ||
this.RegExpress ion != "")) {

Regex validCheck = new Regex(RegExpres sion);

this.IsValid = validCheck.IsMa tch(this.TextBo x1.Trim());

}

This Validate Function i have found from the internet.
Hope this helps you out.

Thanks and Regards,
Manish Bafna.
MCP and MCTS.

"curious" wrote:

I am using a RegularExpressi onValidator to validate a TextBox. I use
"^[\+|-]?[0-9]+(\.[0-9]*)?$" to check for a real number. The control works
fine as long as the user enters something in the TextBox; it does not work if
the user leaves the TextBox blank. Is there a bug in the implementation of
the RegularExpressi onValidator? The above regluar expression should also
catch no entry by the user.

I have added a RequiredFieldVa lidator to solve the problem, but it does not
make sense to have two vlidators for the same textbox: a
RegularExpressi onValidator and a RequiredFieldVa lidator.

Thanks.

--
ASP.NET fan.

[Riki]

curious wrote:

I am using a RegularExpressi onValidator to validate a TextBox. I use
"^[\+|-]?[0-9]+(\.[0-9]*)?$" to check for a real number. The control
works fine as long as the user enters something in the TextBox; it
does not work if the user leaves the TextBox blank. Is there a bug in
the implementation of the RegularExpressi onValidator? The above
regluar expression should also catch no entry by the user.

I have added a RequiredFieldVa lidator to solve the problem, but it
does not make sense to have two vlidators for the same textbox: a
RegularExpressi onValidator and a RequiredFieldVa lidator.

It does make sense, because that is the way it was designed.

Only the RequiredFieldVa lidator checks for empty fields, so most
of the time you'll need 2 validators. The same for RangeValidators and
CompareValidato rs.

--

Riki

[=?Utf-8?B?Y3VyaW91cw==?=]

The reason I stated that it does not make sense to have two controls validate
a textbox is because Microsoft calls its control RegularExpressi onValidator.
If it uses regular Expressions to validate a control, it must respond to a
regular expression the standard way, the way any language such as c#, pearl,
etc. respond. Microsoft should not define a new version of regular
expressions for its controls. I have used regular expressions for many years,
and when I use it in an ASP.NET conrol called RegularExpressi onValidator I
expect it to obey the standard rules of regular expressions. It bothers me (
and a lot of other people) when my code does not work as expected and after a
lot of testing I learn that Microsoft has redefined the standard regular
expressions in a control called RegularExpressi onValidator.

Regards.
--
ASP.NET fan.
"Riki" wrote:

curious wrote:

I am using a RegularExpressi onValidator to validate a TextBox. I use
"^[\+|-]?[0-9]+(\.[0-9]*)?$" to check for a real number. The control
works fine as long as the user enters something in the TextBox; it
does not work if the user leaves the TextBox blank. Is there a bug in
the implementation of the RegularExpressi onValidator? The above
regluar expression should also catch no entry by the user.

I have added a RequiredFieldVa lidator to solve the problem, but it
does not make sense to have two vlidators for the same textbox: a
RegularExpressi onValidator and a RequiredFieldVa lidator.

It does make sense, because that is the way it was designed.

Only the RequiredFieldVa lidator checks for empty fields, so most
of the time you'll need 2 validators. The same for RangeValidators and
CompareValidato rs.

--

Riki