How to validate asp.net page by using javascript [Resolved]

You can use the validation controls like RequiredFieldValidator,RegularExpressionValidator etc from your Validation control ToolBox or you can directly write scripts in javascript as your question does not clearly specify what kind of data are to be validated

Refer this page

http://www.tizag.com/javascriptT/javascriptform.php

Regards,
Denny Kurian

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

Hi, Mahesh

you can write javascript for this as follow

<script language="javascript" type="text/javascript">

function validate()

{

        if(document.getElementById("<%=txtname.ClientID %>").value=="")

      {

                 alert("Please Enter Name");

                document.getElementById("<%=txtname.ClientID %>").focus();

                return false;

      }

      if(document.getElementById("<%=ddlgender.ClientID%>").value=="0")

      {

         alert("Please select Gender");

         return false;

      }



}

</script>

and add textbox,dropdownlist and button

<asp:TextBox ID="txtname" runat="server"></asp:TextBox>





  <asp:DropDownList ID="ddlgender" runat="server" Width="90px">

                            <asp:ListItem Value="0">Select</asp:ListItem>

                            <asp:ListItem Value="1">Male</asp:ListItem>

                            <asp:ListItem Value="2">Female</asp:ListItem>

                        </asp:DropDownList>





<asp:Button ID="btnsubmit" runat="server"  OnClientClick="return validate();" Text="Submit" OnClick="btnsubmit_Click"  />

here
document.getElementById("<%= ID of control.ClientID %>").value

this will get the value of the particular control
and you can check for different condition as per requirement


Thanks

Regards,

Rajendra Patel

R D Patel

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

Hi,
develope javascripts for validating controls on page.
use Custom Validater to validate perticular controls.
print message in Validation Summary control

Himanshu Manjarawala
Sr. Software Engineer@AutomationAnywhere
http://fieredotnet.wordpress.com/

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

You can go ahead with the suggestions given by Himanshu and Rajendra.
Additionally you can use validation controls and ajax toolkit controls.

Thanks,
Sanjay

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Thank U

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

Thank You it is working,
Could you please give me some more depth of this, like if i want to enter Only Letters or Only digits , and length of the string should be in between 6 and 8 characters and email validations.

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

Hi


http://www.dotnetfunda.com/forums/thread8693-validation-of-java-scipt.aspx?com=added
you should refer link given in this post

R D Patel

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good one

Thanks,
Sanjay

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Hii

If i am writing Response.Redirect to so other page in onclick() event, it is redirecting to that page ,even the page is not validate

Thank You,
Mahesh

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

Hi

you have used validation control or javascript?

R D Patel

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Hi

If you have use java script function

then on button 's client click return that function

for ex. I have used validate function
so write

OnClientClick="return validate();"

for that button

thanks

R D Patel

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Patel28rajendra

Nice Man

Life is a Race
Thanks & Regards
By
Sabari Mahesh P M

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Hi,
Could you please tell me ,what is the error in this code

<script type="text/javascript">
function validateEmpty(fld) {
var error = "";
if (fld.value.length == 0) {
fld.style.background = 'Yellow';
error = "The required field has not been filled in.\n"
alert(error);
}
else
{
fld.style.background = 'White';
}
return error;
}
</script>

In the Form

<asp:TextBox ID="txtid" runat="server" ></asp:TextBox>
<asp:Button ID="btnsubmit" runat="server" Text="Submit"
OnClientClick="return validateEmpty(txtid)" onclick="btnsubmit_Click" />

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

Mahesh_Chs

Wat is ur Error can you sent me..

An change it return validateEmpty('txtid')

Life is a Race
Thanks & Regards
By
Sabari Mahesh P M

Mahesh_Chs, if this helps please login to Mark As Answer. | Alert Moderator

Hi

Just modify return statement as follow

return false;

instead of

return error;

Thanks

R D Patel

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