preventing submission without entering fields

Question

i have created registration form as well as login form and i want them to prevent submission without entering fields means i want the user should enter fields and then he should be allowed access. How can i achieve this?

Gowtham Rajamanickam · Answer

function loginValidation() { //Code for login Validation with return fals; return true; // If all fields are valid } try this

Vikram Agrawal · Answer

try it once no need for serverside validation or any validation control put here your javascript code - function loginValidation() { //Code for login Validation with return fals; return true; // If all fields are valid } your button code should be like this - and put your server side code in Button1_Click in login.aspx.cs which will execute when all inputs are valid.

Nitin · Answer

If that is the case then you need to refer the javascript file in the .aspx page. Drag drop the javascript file from the application folder in the .aspx page. Do like this Place this tag under the tag and put the src location of the file in the src tag above.

Anjali C · Answer

yes it is placed in separate file

Nitin · Answer

I guess you have written the code in .aspx.cs file. So to call code behind method using Javascript do something like this. In the .aspx write this code Call JavaScript function from code-behind in Asp.net function myFunction() { //some code here alert('Function called successfully!'); } Call JavaScript function from code-behind in Asp.net Text="Call Function" /> In the .aspx.cs write this code //Following statement is used to call pre-defined javascript function protected void btnServerSide_Click(object sender, EventArgs e) { ScriptManager.RegisterStartupScript(this, GetType(), "myFunction", "myFunction();", true); }

Nitin · Answer

I can see onClick event on the Button but there is no corresponding javascript defined in the source code. You need to write the javascript code also. Is it in some js file referenced from some folder in your application?

Anjali C · Answer

i want the javascript function to invoke on button click but the function is not invoked when the button is clicked. The message is not shown...

Anjali C · Answer

@ Page Title ="" Language ="C#" MasterPageFile ="~/Master1.Master" AutoEventWireup ="true" CodeBehind ="Registration.aspx.cs" Inherits ="ArtsDeals.Registration" %> @ Register assembly ="AjaxControlToolkit" namespace ="AjaxControlToolkit" tagprefix ="asp" %> asp : Content ID ="Content1" ContentPlaceHolderID ="head" runat ="server"> style type ="text/css"> .style1 { text-align : left ; width : 143px ; } .style2 { text-align : left ; height : 30px ; width : 143px ; } .style3 { height : 30px ; } style > asp : Content > asp : Content ID ="Content2" ContentPlaceHolderID ="ContentPlaceHolder1" runat ="server"> div style =" width : 553px"> table style =" width : 515px; height : 283px;"> tr > th class ="style1"> First Name th > td > asp : TextBox ID ="txtFName" runat ="server" CausesValidation ="True"> asp : TextBox > asp : RequiredFieldValidator ID ="RequiredFieldValidator1" runat ="server" ControlToValidate ="txtFName" ErrorMessage ="Please enter First Name" ForeColor ="Red"> asp : RequiredFieldValidator > td > tr > tr > th class ="style1"> Middle Name th > td > asp : TextBox ID ="txtMName" runat ="server" CausesValidation ="True"> asp : TextBox > asp : RequiredFieldValidator ID ="RequiredFieldValidator2" runat ="server" ControlToValidate ="txtMName" ErrorMessage ="Please enter Middle name" ForeColor ="Red"> asp : RequiredFieldValidator > td > tr > tr > th class ="style1"> Last Name th > td > asp : TextBox ID ="txtLName" runat ="server" CssClass ="Validators" CausesValidation ="True"> asp : TextBox > asp : RequiredFieldValidator ID ="RequiredFieldValidator3" runat ="server" ControlToValidate ="txtLName" ErrorMessage ="Please enter Last Name" ForeColor ="Red"> asp : RequiredFieldValidator > td > tr > tr > th class ="style1"> Date Of Birth th > td > asp : TextBox ID ="txtDOB" runat ="server" ControlToValidate ="TextBox5" CssClass ="Validators" CausesValidation ="True"> asp : TextBox > asp : CalendarExtender ID ="txtDOB_CalendarExtender" runat ="server" Enabled ="True" TargetControlID ="txtDOB"> asp : CalendarExtender > td > tr > tr > th class ="style1"> Mobile No th > td > asp : TextBox ID ="txtMob" runat ="server" CausesValidation ="True"> asp : TextBox > asp : RegularExpressionValidator ID ="RegularExpressionValidator5" runat ="server" ControlToValidate ="txtMob" ErrorMessage ="MObileNO Required" ForeColor ="Red" ValidationExpression ="^((\+91-?)|0)?[0-9]{10}$"> asp : RegularExpressionValidator > td > tr > tr > th class ="style1"> EmailId th > td > asp : TextBox ID ="emailtxt" runat ="server" CausesValidation ="True"> asp : TextBox > asp : RegularExpressionValidator ID ="RegularExpressionValidator6" runat ="server" ControlToValidate ="emailtxt" CssClass ="Validators" ErrorMessage ="Emailid Required" ForeColor ="Red" ValidationExpression ="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"> asp : RegularExpressionValidator > td > tr > tr > th class ="style1"> Gender th > td > asp : RadioButtonList ID ="txtGender" runat ="server" CssClass ="Validators" Height ="16px" RepeatDirection ="Horizontal" Width ="188px" CausesValidation ="True"> asp : ListItem > Male asp : ListItem > asp : ListItem > Female asp : ListItem > asp : RadioButtonList > td > tr > tr > th class ="style2"> Password th > td class ="style3"> asp : TextBox ID ="txtPswrd" runat ="server" TextMode ="Password" CausesValidation ="True"> asp : TextBox > asp : RegularExpressionValidator ID ="RegularExpressionValidator8" runat ="server" ControlToValidate ="txtPswrd" CssClass ="Validators" ErrorMessage ="Password must contain: Minimum 8 characters atleast 1 Alphabet and 1 Number" ForeColor ="Red" ValidationExpression ="^(?=.*[A-Za-z])(?=.*\d)[A-Za-z\d]{8,}$"> asp : RegularExpressionValidator > td > tr > tr > th class ="style1"> Verify Password th > td > asp : TextBox ID ="txtVerify" runat ="server" TextMode ="Password" CausesValidation ="True"> asp : TextBox > asp : CompareValidator ID ="CompareValidator1" runat ="server" ControlToCompare ="txtPswrd" ControlToValidate ="txtVerify" CssClass ="Validators" ErrorMessage ="*" ForeColor ="Red"> asp : CompareValidator > td > tr > table > br /> asp : Button ID ="Button1" runat ="server" onclick ="Button1_Click" Text ="Register" style =" font-weight : 700" /> asp : ToolkitScriptManager ID ="ToolkitScriptManager1" runat ="server"> asp : ToolkitScriptManager > div > asp : Content >

Vikram Agrawal · Answer

don't you want it in ButtonClick? then please tell me where do you want to invoke these functions?

Nitin · Answer

Post your code here.

Anjali C · Answer

i am not using any validation group....

Anjali C · Answer

i have earlier used javascript file but the function in invoking on button click event wat should i do?

Vikram Agrawal · Answer

Hi Anjali, put all login validation code in one javascript function i.e. LoginValidation () and return false if any of validation gets fails and return true if all inputs are valid. Do the samething for Registration also and call this function on button's OnClientClick event like below:

Riddhi Valecha · Answer

Hi.. Instead, make a validating method in code file (aspx.cs) page. Eg - private String Validate() { if(txt_FirstName.text.Lenght > 0) { if(txt_LastName.text.lenght > 0) { return null; } else return "Enter Last Name."; } else return "Enter First Name."; } -- Add all the fields you have on your page. ------ Call this in button click -- private void button1_click () { if(Validate() == null) { // Insert. } }

Khargesh Rajput · Answer

share your aspx code

Nitin · Answer

Hi, Are you using different validation groups in this forms? Or have you separated this form into two validation group?

Anjali C · Answer

hi, i have set the causes validation property to true and after executing it shows the message and when i enter the value still the message is shown how to make the validation false...help expected...

Nitin · Answer

Put validation in your forms. In ASP.NET there are certain validators that are used to enforce putting some text in a textbox or selecting a value from a dropdownlist. RequiredFiledValidator is the one that you should use here so that the form does not get posted without entering any values.

preventing submission without entering fields

Answers (18)