preventing submission without entering fields

Anjali C

11y1.4k.NET

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?

18 Replies

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Gowtham Rajamanickam11y ago
try this
Vikram Agrawal11y ago

try it once no need for serverside validation or any validation control

put here your javascript code -
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.
Nitin11y ago
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 C11y ago
yes it is placed in separate file
Nitin11y ago
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






        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);
}
Nitin11y ago
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 C11y ago
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 C11y ago
<%@ 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 Nameth>

                <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 Nameth>

                <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 Nameth>

                <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 Birthth>

                <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 Noth>

                <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">

                    EmailIdth>

                <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">

                    Genderth>

                <td>

                    <asp:RadioButtonList ID="txtGender" runat="server" CssClass="Validators"

                        Height="16px" RepeatDirection="Horizontal" Width="188px"

                        CausesValidation="True">

                        <asp:ListItem>Maleasp:ListItem>

                        <asp:ListItem>Femaleasp:ListItem>

                    asp:RadioButtonList>

                td>

            tr>

            <tr>

                <th class="style2">

                    Passwordth>

                <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 Passwordth>

                <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 Agrawal11y ago
don't you want it in ButtonClick?
then please tell me where do you want to invoke these functions?
Nitin11y ago
Post your code here.
Anjali C11y ago
i am not using any validation group....
Anjali C11y ago
i have earlier used javascript file but the function in invoking on button click event wat should i do?
Vikram Agrawal11y ago

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 Valecha11y ago
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 Rajput11y ago
share your aspx code
Nitin11y ago
Hi,

Are you using different validation groups in this forms? Or have you separated this form into two validation group?
Anjali C11y ago
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...
Nitin11y ago
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

Call JavaScript function from code-behind in Asp.net