C# .NET - validations

  Sagar P replied to venkatesh

  Sreekumar P replied to venkatesh

body > < form id = "form1" runat = "server" > < div id = "content" > < div style = "text-align: left;" > < asp:ValidationSummary ID = "ValidationSummary1" runat = "server" ValidationGroup = "Authorize" / > < br / > < table border = "0" cellpadding = "5" cellspacing = "0" width 500" > < tr > < td > First Name< br / > < asp:TextBox ID = "FirstNameTextBox" runat = "server" > < / asp:TextBox > < asp:RequiredFieldValidator ID = "RequiredFieldValidator1" ControlToValidate = "FirstNameTextBox" runat = "server" ErrorMessage = "First Name is a Required Field" Text = "*" ValidationGroup = "Authorize" > < / asp:RequiredFieldValidator > < asp:RegularExpressionValidator ID = "RegularExpressionValidator1" runat = "server" ControlToValidate = "FirstNameTextBox" ErrorMessage = "Please limit the length of the content entered to 40 characters" ValidationGroup = "Authorize" ValidationExpression = "^[ \ s \ S]{0, 40}$" > *< / asp:RegularExpressionValidator > < / td > < td > Last Name< br / > < asp:TextBox ID = "LastNameTextBox" runat = "server" > < / asp:TextBox > < asp:RequiredFieldValidator ID = "RequiredFieldValidator2" ControlToValidate = "LastNameTextBox" runat = "server" ErrorMessage = "Last Name is a Required Field" Text = "*" ValidationGroup = "Authorize" > < / asp:RequiredFieldValidator > < asp RegularExpressionValidator ID = "RegularExpressionValidator2" runat = "server" ControlToValidate = "LastNameTextBox" ErrorMessage = "Please limit the length of the content entered

error message according to the error To validate a server control's input using a RegularExpressionValidator • Add a RegularExpressionValidator control to your page. • Set the ControlToValidate property to indicate which control to validate. • Set to define the message to display if the validation fails. The following example shows a RegularExpressionValidator control used to validate a name field. < %@ language = " C#" % > < form id = " form1" runat = " server" > < asp:TextBox ID = " txtName" runat = " server" / > < asp:Button ID = " btnSubmit" runat = " server" Text = " Submit" / > < asp:RegularExpressionValidator ID = " regexpName" runat = " server" ErrorMessage = " This expression does not validate." ControlToValidate = " txtName" ValidationExpression = " ^[a-zA http: / / msdn.microsoft.com / en-us / library / aa479013.aspx Here is a sample of a RegularExpressionValidator control to validate a name field : <form id = "WebForm" method = "post" runat = "server"> <asp:TextBox id = "txtName" runat = "server"> < / asp:TextBox> <asp:RegularExpressionValidator id = "nameRegex"runat = "server" ControlToValidate = "txtName" ValidationExpression = "[a-zA-Z'.`-´ \ s]{1, 40}" ErrorMessage = "Invalid name"> < / asp:regularexpressionvalidator> < / form> How do I validate input in server-side controls: http: / / www.securityguidanceshare.com / wiki Sujit. The RangeValidator Server Control The RangeValidator control is quite similar to that of the CompareValidator control, but it makes sure that the end-user value or selection provided is between

works fine. so any ideas?? Thanx in advance. Validation controls, which includes the BaseCompareValidator , BaseValidator , CompareValidator , CustomValidator , RangeValidator , RegularExpressionValidator , RequiredFieldValidator , and ValidationSummary control are not compatible with UpdatePanel http: / / weblogs.asp.net / scottgu / archive / 2007 / 01 / 25 config file (just like in the RC release): < tagMapping > < add tagType = "System.Web.UI.WebControls.CompareValidator" mappedTagType = "Sample.Web.UI.Compatibility.CompareValidator, Validators, Version = 1.0.0.0" / > < add tagType = "System.Web.UI.WebControls.CustomValidator" mappedTagType = "Sample.Web.UI.Compatibility.CustomValidator, Validators, Version = 1.0.0.0" / > < add tagType = "System

use any one or more than one depends upon your need. Validation Server Control Description CompareValidator Compares the value of one input control to the value of another input control or to a fixed value CustomValidator Allows you to write a method to handle the validation of the value entered RangeValidator Checks that the user enters a value that falls between two values RegularExpressionValidator Ensures that the value of an input control matches a specified pattern RequiredFieldValidator Makes an input control a required field ValidationSummary Displays a report of all validation errors occurred in a Web page see this link following links to use validation controls in proper ways. For textbox validation you can use comparevalidator, requiredvalidator according to your requirement. http: / / www.w3schools.com / aspnet / aspnet_refvalidationcontrols.asp http: / / aspnet.4guysfromrolla Are Predefined Validation Tools In The Toolbox. There Are Total Six type Of Validations. 1) RequiredFieldValidator : This Control Is Used For When You Want That User Must Enter Some Value In Number Etc. These Are Compulsory, So You Can Validate These Fields Using This Control. 2) CompareValidator : This Control Is Used For Comparing two Values From The Given By User. E.g

end sub < / script > < html > < head > < title > Validation Sample< / title > < / head > < body > < form runat = server > < asp:ValidationSummary runat = server headertext = "There were errors on the page:" / > < p > Please enter a User ID and Password:< / p > < table > < tr > < td > < asp:RequiredFieldValidator runat = server controltovalidate = txtName errormessage = "User ID is required." > * < / asp RequiredFieldValidator > < / td > < td > User ID:< / td > < td > < input type = text runat = server id = txtName > < asp:RegularExpressionValidator runat = server display = dynamic controltovalidate = "txtName" errormessage = "ID must be 6-10 letters." validationexpression = "[a-zA-Z]{6, 10}" / > < asp:CustomValidator runat = server controltovalidate = "txtName" errormessage = "ID is already in use." OnServerValidate = "CheckID" / > < / td > < / tr > < tr td > < asp:RequiredFieldValidator runat = server controltovalidate = txtPWord errormessage = "Password is required." > * < / asp:RequiredFieldValidator > < / td > < td > Password:< / td > < td > < input type = password runat = server id = txtPWord > < asp:RegularExpressionValidator runat = server display = dynamic controltovalidate = "txtPWord" errormessage = "Password must contain one of @#$%^&* / ." validationexpression = ".*[@#$%^&* / ].*" / > < asp:RegularExpressionValidator