CODEWITHSUNDEEP
c#formswinforms
Shweta Reddy
Shweta Reddy

Reputation: 371

How to call assign value of label of one form In other class?

I am having class

MainForm.cs where its MainFormDesigner.cs

 public System.Windows.Forms.Label diffTime;

I want this labels value to be assigned in Other class

Request.cs class When I try in these way

 MainForm.diff.Text = "Diff:" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

Tried giving static in MainForm but unable to get label values assigned in other class.

How can I do this, any help on this please.

Upvotes: 1

Views: 592

Answers (2)

Nam Bình
Nam Bình

Reputation: 422

A cheating way:

public partial class MainForm : Form
{
    public static System.Windows.Forms.Label diffTime;

    public MainForm()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        diffTime = new System.Windows.Forms.Label();
        diffTime.AutoSize = true;
        diffTime.Location = new System.Drawing.Point(113, 55);
        diffTime.Name = "diffTime";
        diffTime.Size = new System.Drawing.Size(35, 13);
        diffTime.TabIndex = 0;
        diffTime.Text = "label1";
        this.Controls.Add(diffTime);
    }

then in Request.cs you can call MainForm.diff.Text = "Diff:" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

But I recommend you follow Reza Aghaei's answer, you need some variable to hold your MainForm's instance: Request.cs:

public class Request
{
    public static MainForm mainForm = null;
    public static void setLabelText()
    {
        mainForm.diffTime.Text = "Diff:" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
    }
}

Assuming MainForm is called in Program.cs:

Request.mainForm = new MainForm(); //pass your instance to Request.cs
Application.Run(Request.mainForm);

Upvotes: 0

Reza Aghaei
Reza Aghaei

Reputation: 125332

Go to Designer of your form, select your label, in properties, select Modifier then change the value of modifier to public.

Then in other class, assuming, there you have an instance of your MainForm do this:

//if the variable of instance of your MainForm is mainForm for example:
mainForm.diff.Text = "Diff:" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

Upvotes: 4

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