?
Solved

How do I check to see the value (if its empty or not) in TextBox1 from my class file (ASP.Net, C#)

Posted on 2012-12-22
4
Medium Priority
?
482 Views
Last Modified: 2012-12-23
I would like to make a static class that check to see if  a checkbox has something in it or not. And if  it does, I want to execute my code.  I just don’t know how to check the textbox

public class costCL
{
    
    public double rs;
   
    public void Add(double c, double s, double st)
	{
        if(don't know what goes here)
            double ftax = 5.00; 
            
            rs = Math.Round(c + s + st + ftax, 2);
    }
         

Open in new window

0
Comment
Question by:bmanmike39
4 Comments
 
LVL 18

Expert Comment

by:Jerry Miller
ID: 38716167
You can use the IsNullOrEmpty method to check the value.

If Not String.IsNullOrEmpty(TextBox.Text) then
execute your code


http://msdn.microsoft.com/en-us/library/system.string.isnullorempty.aspx
0
 

Author Comment

by:bmanmike39
ID: 38716329
I don't know how to access the text box from my class file
0
 
LVL 16

Accepted Solution

by:
Vikram Singh Saini earned 2000 total points
ID: 38716590
Hi,

Please check link: http://www.vss-tech.com/access-page-control-from-class-file-in-app_code/

to see how to access text box from .aspx page in class file(.cs) from App_Code.

Let us know if you face any problem.
0
 
LVL 19

Expert Comment

by:Manoj Patil
ID: 38717584
Hey, if you want to restrict the user to enter the value in textbox then you can use regular expression n your .aspx page
Try it your self here
http://www.w3schools.com/aspnet/showasp.asp?filename=demo_reqfieldvalidator

Or you can check it by using java-script


function msgBox(objtxt)

{
var objtxt=document.getElementById('<%=TextBox2.ClientId%>');
if (objtxt.value.length == 0)

{
alert('TextBox shouldnot be empty');

objtxt.focus();

}

}



<asp:TextBox ID="TextBox2" onkeyup ="msgBox(this);" runat="server"></asp:TextBox><br />
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

SingleRun is a tool that ensures that only one instance of an application is started, running it again brings the application to focus.
Article by: Shaun
Tiling windows is a great way to see multiple applications at once. Windows Tiler is a tool that automatically tiles open application windows as the open and close.
In response to a need for security and privacy, and to continue fostering an environment members can turn to for support, solutions, and education, Experts Exchange has created anonymous question capabilities. This new feature is available to our Pr…
In the video, one can understand the process of resizing images in single or bulk. Kernel Bulk Image Resizer is an easy to use tool for resizing large number of images. One can add and resize multiple images with this tool in single go. The video sh…

569 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question