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Validation in Asp.Net
Validation is one of the most important tools used in building online forms for eample; online registration forms. There are many Asp.net validation tools.
Types: 1.Required field validator 2.Range validator 3.Regular ExpressionValidator 4.Compare Validator 5.Custom Validator 6.Validation Summary Properties: i)control to validate ii)control to compare iii)operator iv)type v)error message Mainly Asp.net validation tools are implemented using the properties windows rather than coding Here I will show you with a example of a online registration form of a online shopping website with all types of validation. In the above screenshots we can see that all the validation are Required Field Validation.
Now how we can apply such validation: Step1: just drag or double click the “required filed validator” from the tool box. Step2:Then selecting the validator tool type f4.The properties window will open.From there you have to change the properties. Step3:Change the Properties like i)control to validate: this a very important property.You have to select the tool on which you want to create a validation.For eg. Textboxs,radio buttons etc. ii)Error Message: where you can change the message which will appear when some one does’nt fill up the textbox.For example: here in the above screenshots I have given many error messages(in red) eg. “name required”,”username not entered” etc. Second example of a Compare Validation: In the above screenshots we can see that the validation is Compare Validation.This type of validation is always used during password confirmation.
Now how we can apply such validation: Step1: just drag or double click the “CompareValidator” from the tool box. Step2:Then selecting the validator tool type f4.The properties window will open.from there you have to change the properties. Step3: Change Properties like i)control to validate: Similary like the above example a you have to select the tool on which you want to create the validation.For eg. Textboxs. ii)control to compare:You have to choose the another textboxs with which you want to compare the text ii)Error Message: Same as above.The difference is that if both the keywords entered in the two textboxs does’nt match then only the message will appear.For example: here in the above screenshots I have given “password and confirm password not match”. |