CODEWITHSUNDEEP
c#winformstextbox
user2552211
user2552211

Reputation: 143

Checking for empty textbox

Im trying to Create a method that can look at all text boxes in my program and tell me when the next blank one is so far. this is what i have come up with and cannot get it to work 

    public void CheckBox()
    {
        string[] itemBoxArray = new string[] { "itemBox1", "itemBox2", "itemBox3", "itemBox4", "itemBox5", "itemBox6", 
            "itemBox7", "itemBox8", "itemBox9", "itemBox10","itemBox11","itemBox12","itemBox13","itemBox14","itemBox15","itemBox16",};
        for (int i = 0; i < itemBoxArray.Length; i++)
        {
            if (itemBoxArray[i] == string.Empty)
            {
                MessageBox.Show(" " + itemBoxArray[i] + " Is empty");
            }
            else
            {
                MessageBox.Show("Item Box is full");
            }
        }
    }

Upvotes: 0

Views: 177

Answers (2)

Grant Winney
Grant Winney

Reputation: 66439

You could use something like this to find the first TextBox that has an empty Text value:

var emptyTextBox = Controls.OfType<TextBox>().First(x => x.Text == string.Empty);

MessageBox.Show(string.Format(" {0} Is empty", emptyTextBox.Name));

You'll probably have to beef this up a bit.

  • It'll fail if no TextBox is empty. Use FirstOrDefault and test for null if that's a concern.

  • Also, it'll fail to find TextBox controls inside of a GroupBox or Panel. That may not matter depending on how your form is designed.

If you only have a set number of TextBox controls to check for, your code will work with a little adjustment, but if you're going to keep adding more TextBoxes, it's going to be a pain to maintain.

Upvotes: 0

Damith
Damith

Reputation: 63065

create array of TextBox like below 

    public void CheckBox()
    {
        TextBox[] itemBoxArray = new TextBox[] { itemBox1, itemBox2, ........};
        for (int i = 0; i < itemBoxArray.Length; i++)
        {
            if (String.IsNullOrEmpty(itemBoxArray[i].Text))
            {
                MessageBox.Show(" " + itemBoxArray[i].Name + " Is empty");
            }
            else
            {
                MessageBox.Show("Item Box is full");
            }
        }
    }

Upvotes: 2

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