Improve company productivity with a Business Account.Sign Up

x
?
Solved

Winform combobox validate for empty string

Posted on 2012-04-05
3
Medium Priority
?
1,340 Views
Last Modified: 2012-04-05
I have a winform with 4 comboboxes. I used the IDE and "Items" and added the values manually to the combo box. 3 or 4 values in each combobox.

I open the form and nothing is selected. User has to selected something from the combox box. I have checked for "combo.SelectedValue", "combo.text", "combo.selectedtext", and "combo.selectedindex" . But, even when I select something from the dropdown, the values show as blank. I don't have an event or anything. I click a button and want to validate all combo boxes at the same time...

what do i need to do??
0
Comment
Question by:Camillia
3 Comments
 
LVL 16

Expert Comment

by:Vikram Singh Saini
ID: 37813243
Try combo.SelectedItem.ToString():

private void btnShow_Click(object sender, EventArgs e)
		{
			label1.Text = "Combobox 1: " + comboBox1.SelectedItem.ToString() +
				"Combobox 2: " + comboBox2.SelectedItem.ToString() +
				"Combobox 3: " + comboBox3.SelectedItem.ToString() +
				"Combobox 4: " + comboBox4.SelectedItem.ToString();
		}

Open in new window

0
 
LVL 20

Accepted Solution

by:
BuggyCoder earned 2000 total points
ID: 37813460
to validate for empty string just add on click method and use this code:-

public void button1_click(object sender, EventArgs e)
{
if(IsValid())
{
//Button click processing here
}
else
{
//Validation Failure message here
}
}

private bool IsValid()
{
return (cmb1.Text!=String.Empty) && (cmb2.Text!=String.Empty);
}

Open in new window

0
 
LVL 7

Author Comment

by:Camillia
ID: 37813746
let me try
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.

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

Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
The PowerShell Core 6.0 of .NET release is just the beginning. The upcoming PowerShell Core 6.1 would have artificial intelligence and internet of things capabilities. So many things to look forward to in the upcoming release.
Watch the video to know the process of migration of Exchange or Office 365 mailboxes in absence of MS Outlook. It is an eminent tool which can easily migrate Public, Archive user mailboxes from one another Exchange server and Office 365. Kernel Migr…
Watch the working video to know how to import Outlook PST/OST files to Amazon WorkMail. Kernel released this tool which is very easy to use and migrate single or multiple PST and OST files to Amazon WorkMail. To know more about Kernel Import PST to …

608 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