say suppose i have developed a form with the asp.net technology and there is five textboxes for fields like first name,last name,age,salary,mail id and all the fields are mandatory.
when user forget to fill up any fileds then form will not be submitted and those empty filled will come back again for filling up.say suppose user forget to fill up first name and salary then form will not be submitted and textboxes for first name and salary will come back again one after another for filling up.please tell me how can do it.

The method that ASP.NET provides to deal with this issue is via controls or components called validators.

There are different types of validators such as RequiredFiedValidators, Compare Validator and REgular expresion validators.

A simple example for a required field is this:
- Place a required field validator next to the textbox representing the required field.
- Change the .Text property of the validator to *.
- Change the .ErrorMessage text to something like "Everybody must have a first name, put yours in the box."

- Set the .ControlToValidate property of the validator to the name of the control you want to validate txtFirstName for instance.
- At the end/bottom of the form, place a Validation summary control on the form.

Run the application. When you click the submit button without entering your name, a red asterisk (*) appears next to the text box and at the bottom of the page will be the text :
"Everybody must have a first name, put yours in the box."

You can have as many of these validators on your form as ...OK as sense will allow. When the form is submitted, validation takes place before your submit code is run. The validation summary is displayed and you live happily ever after because you will not get invalid/incomplete (hopefully) state information from your page. All this happens without you writing a line of code for validation.

Happy coding(or not)


____________________________
My boss is a Jewish Carpenter (Jesus Christ)


Brain Bench Certified VB.NET Developer

The method that ASP.NET provides to deal with this issue is via controls or components called validators.

There are different types of validators such as RequiredFiedValidators, Compare Validator and REgular expresion validators.

A simple example for a required field is this:
- Place a required field validator next to the textbox representing the required field.
- Change the .Text property of the validator to *.
- Change the .ErrorMessage text to something like "Everybody must have a first name, put yours in the box."

- Set the .ControlToValidate property of the validator to the name of the control you want to validate txtFirstName for instance.
- At the end/bottom of the form, place a Validation summary control on the form.

Run the application. When you click the submit button without entering your name, a red asterisk (*) appears next to the text box and at the bottom of the page will be the text :
"Everybody must have a first name, put yours in the box."

You can have as many of these validators on your form as ...OK as sense will allow. When the form is submitted, validation takes place before your submit code is run. The validation summary is displayed and you live happily ever after because you will not get invalid/incomplete (hopefully) state information from your page. All this happens without you writing a line of code for validation.

Happy coding(or not)


____________________________
My boss is a Jewish Carpenter (Jesus Christ)


Brain Bench Certified VB.NET Developer