CODEWITHSUNDEEP
c#winformstextbox
user2499687
user2499687

Reputation: 35

Initialize the value of a textbox when form loads

I would like to put a string value in my frmCredentials.txtUsername text box when the form first loads.

Here is the code where the form is first called:

Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new frmCredentials());

Upvotes: 2

Views: 27971

Answers (6)

sab669
sab669

Reputation: 4104

Mohit probably has the best answer, but if you ONLY want to be able to create a form with the textbox you don't need to retain the 'default' constructor as he/she did:

 public class frmCredentials : Form
 {
     public frmCredentials(string myValue)
     {
         InitializeComponent();
         txtUsername.Text = myValue;
     }
 }

Now when you call a new frmCredentials, you'll have to pass it a string, like so

 var myForm = new frmCredentials("A string is required.");

Upvotes: 1

Anjan
Anjan

Reputation: 31

Yes Form load event is better to load default values when loading the Form

        private void Form1_Load(object sender, EventArgs e)
        {
            txtUsername.Text = "My Username";
        }

Upvotes: 2

Mohit
Mohit

Reputation: 115

You can create an overloaded constructor that accepts one parameter, and another one will be your default constructor.

public class frmCredentials : Form
{
    public frmCredentials()
    {
        InitializeComponent();
    }

    public frmCredentials(string myValue )
    {
        InitializeComponent();
        txtUsername.Text = myValue;
    }
}

from your code:

Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new frmCredentials("Hello World"));

Upvotes: 3

CodeCamper
CodeCamper

Reputation: 6980

Step 1) Double Click On Your Form: This will create and display the form load event.

Step 2) Type in the {} the following, txtUsername.Text="MyTextGoesHere";

After you try this if this still does not resolve your homework please comment below and I will try to help further.

Upvotes: 2

Grant Winney
Grant Winney

Reputation: 66439

You could set it in the constructor of frmCredentials:

public class frmCredentials : Form
{
    public frmCredentials()
    {
        InitializeComponent();

        txtUsername.Text = "whatever";
    }
}

Upvotes: 1

Adriaan Stander
Adriaan Stander

Reputation: 166336

Why not put the code in the Form.Load event

Occurs before a form is displayed for the first time.

You can use this event to perform tasks such as allocating resources used by the form.

Upvotes: 4

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