How to pass(txtTitle) value from ShowBox method to CustomMessageBox_Paint ?WinForms

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C#

public static string ShowBox(string txtMessage, string txtTitle)
       {
           newMessageBox = new CustomMessageBox();
           newMessageBox.lblTitle.Text = txtTitle;
           newMessageBox.lblMessage.Text = txtMessage;
           newMessageBox.ShowDialog();
           return Button_id;
       }

C#

private void CustomMessageBox_Paint(object sender, PaintEventArgs e)
{
    Color cl = Color.Blue;
    Graphics mGraphics = e.Graphics;
    //Pen pen1 = new Pen(Color.FromArgb(96, 155, 173), 1);
    pen1 = new Pen(cl);   //For Border color of message box
    Rectangle Area1 = new Rectangle(0, 0, this.Width - 1, this.Height - 1);
    //LinearGradientBrush LGB = new LinearGradientBrush(Area1, Color.FromArgb(96, 155, 173), Color.FromArgb(245, 251, 251), LinearGradientMode.Vertical);
    LGB = new LinearGradientBrush(Area1, cl, Color.FromArgb(245, 251, 251), LinearGradientMode.Vertical); // For BackColor
    mGraphics.FillRectangle(LGB, Area1);
    mGraphics.DrawRectangle(pen1, Area1);
}

Posted 16-Nov-15 19:25pm

Sathish km

Updated 16-Nov-15 20:09pm

George Jonsson

v2

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George Jonsson · Accepted Answer · 2015-11-16T20:20:00

You set this variable in your calling code

C#

newMessageBox.lblTitle.Text = txtTitle;

which means you have passed the value to the new instance of the class CustomMessageBox, hence it is available for all non-static class methods.

However, I don't see that you are using lblTitle.Text inside

C#

private void CustomMessageBox_Paint(object sender, PaintEventArgs e)

So what do you expect to happen?

That said, a little Object Oriented pointer.
It is not a good practice to expose private member variables to the outside world like you do with lblTitle.Text
Better wrap this variable in a public property:

C#

public string DialogTitle
{
    get
    {
        return lblTitle.Text;
    }
    set
    {
        lblTitle.Text = value;
    }
}

This is what they call encapsulation.