Introduction
If you want validation for emial and website url Here is the link
http://aspdotnet-suresh.blogspot.com/2010/09/validation-for-email-and-url-using-in.html
Happy Coding
Here I will explain how to validate form using JavaScript validations in asp.net
Description
I have a one sample registration form that contains fields like Username, Password, Confirm Password, First Name, Last Name, Email, PhoneNo and Location.
Now I want to check whether user enter data in all fields or not and I want to check whether user enter correct data in all fields or not by using JavaScript.
If I want to check whether user enters data in textbox or not write script like this
function isvaliduser() { var uid; var temp=document.getElementById("<%=txtuser.ClientID %>"); uid=temp.value; if(uid=="") { alert ("Please Enter UserName”); return false; } else { return true; } } |
Write the following code aspx page
<html xmlns="http://www.w3.org/1999/xhtml"> <head id="Head1" runat="server"> <title>Vallidations Page</title> <script language="javascript" type="text/javascript"> function validate() { var summary = ""; summary += isvaliduser(); summary += isvalidFirstname(); summary += isvalidLocation(); if (summary != "") { alert(summary); return false; } else { return true; } } function isvaliduser() { var uid; var temp = document.getElementById("<%=txtuser.ClientID %>"); uid = temp.value; if (uid == "") { return ("Please Enter UserName" + "\n"); } else { return ""; } } function isvalidFirstname() { var uid; var temp = document.getElementById("<%=txtfname.ClientID %>"); uid = temp.value; if (uid == "") { return ("Please enter firstname" + "\n"); } else { return ""; } } function isvalidLocation() { var uid; var temp = document.getElementById("<%=txtlocation.ClientID %>"); uid = temp.value; if (uid == "") { return ("Please enter Location" + "\n"); } else { return ""; } } </script> </head> <body> <form id="form1" runat="server"> <table align="center"> <tr> <td> <asp:Label ID="lbluser" runat="server" Text="Username"></asp:Label> </td> <td> <asp:TextBox ID="txtuser" runat="server"></asp:TextBox> </td> </tr> <tr> <td> <asp:Label ID="lblfname" runat="server" Text="FirstName"></asp:Label> </td> <td> <asp:TextBox ID="txtfname" runat="server"></asp:TextBox> </td> </tr> <tr> <td> <asp:Label ID="lbllocation" runat="server" Text="Location"></asp:Label> </td> <td> <asp:TextBox ID="txtlocation" runat="server"></asp:TextBox> </td> </tr> <tr> <td> </td> <td> <asp:Button ID="btnsubmit" runat="server" Text="Save" OnClientClick ="javascript:validate()" /> </td> </tr> </table> </form> </body> </html> |
Demo
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http://aspdotnet-suresh.blogspot.com/2010/09/validation-for-email-and-url-using-in.html
Happy Coding
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2 comments :
In the button event, I'm redirecting the page to another link. The page is redirecting even with the empty textboxes? The return false in the java script is not working?
thanks....this really helps me.