Solved

I need assistance with a Collection in my ASP.Net application

Posted on 2011-09-07
3
223 Views
Last Modified: 2012-05-12
Hi experts,
I have a collection in my ASP.Net application with C#.Codebehind.  I want to display the values
in my collection in a Label control.  How can I do this?  I tried the following but it gave me an error.
lblErrors.Text = validationErrors.ToString();

Here is the code for my collection.
private Collection<String> ValidateData()
        {
            Collection<string> validationErrors = new Collection<String>();

            if (txtTitle_Edit.Text.Length < 1)
            {
                validationErrors.Add("Please provide a title for the book.");
            }

            if (txtAuthorFirstname_Edit.Text.Length < 1)
            {
                validationErrors.Add("Please enter the Author's last name.");
            }

            if (txtISBN_Edit.Text.Length < 1)
            {
                validationErrors.Add("Please enter the book's ISBN#.");
            }

            if (txtPublisher_Edit.Text.Length  < 1)
            {
                validationErrors.Add("Please enter the publisher's name.");
            }
            return validationErrors;

        }


Thanks in advance
mrotor
0
Comment
Question by:mainrotor
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 18

Accepted Solution

by:
ivan_vagunin earned 500 total points
ID: 36498520
Hi! Try following:
foreach(string error in ValidateData())
{
    lblErrors.Text += error + "<br/>";
}
0
 
LVL 2

Expert Comment

by:AJRDev
ID: 36498567
Your validationErrors variable only exists inside the ValidateData() method which is why you can't reference it outside that scope.

You need to do something like this:

private List<String> ValidateData()
{
    List<string> validationErrors = new List<String>();

    if(txtTitle_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please provide a title for the book.");
    }

    if(txtAuthorFirstname_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please enter the Author's last name.");
    }

    if(txtISBN_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please enter the book's ISBN#.");
    }

    if(txtPublisher_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please enter the publisher's name.");
    }
    return validationErrors;
}


private void button1_Click(object sender, EventArgs e)
{
    List<String> validationErrors = ValidateData();
    StringBuilder sb = new StringBuilder();

    foreach(String s in validationErrors)
    {
        sb.Append(s);
        sb.Append(" : "); // Or whatever other formatting you want.
    }

    lblErrors.Text = sb.ToString();
}

Open in new window

0
 
LVL 19

Expert Comment

by:Albert Van Halen
ID: 36498659
I would use a generic list, convert it to an array and then use String.Join
private List<String> ValidateData()
{
    List<string> validationErrors = new List<String>();

    if(txtTitle_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please provide a title for the book.");
    }

    if(txtAuthorFirstname_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please enter the Author's last name.");
    }

    if(txtISBN_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please enter the book's ISBN#.");
    }

    if(txtPublisher_Edit.Text.Length < 1)
    {
        validationErrors.Add("Please enter the publisher's name.");
    }
    return validationErrors;
}


private void button1_Click(object sender, EventArgs e)
{
    lblErrors.Text = String.Join("<your seperator>", ValidateData().ToArray());
}

Open in new window

0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…

739 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