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Jul 21st, 2008

Accesing variable/function in Control using (Control)Sender

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Hi,

I've created a partial class : Control for designing the shape of my polygon.
It works well but there's one problem that I tried to find on net but I get nothing.

I've created one int named 'size'. Then I created a function named 'Growing' for 'get' and 'set'.
When I created an object from that class, I just type on the object name.Growing, then I can 'get' the size and 'set' the size.
This no problem.

The problem exist when I created as follow:

private void Grow(object sender, EventArgs e)
{
Control controlAll = (Control)sender;

}

This 'controlAll' is use to track which polygon I choose.
but when I run this line of code, it seems like controlAll can't get to the function I declared in the class "Growing"

controlAll.Growing = 50; // ERROR WENT HERE

Is there any ways to make the control to identified the function that I created in the class ? Any idea ?

karhong

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Jul 21st, 2008

Re: Accesing variable/function in Control using (Control)Sender

Sure, cast it to ShapeControl because Control class doesn't contain Growing property.

c# Syntax (Toggle Plain Text)
private void Grow(object sender, EventArgs e)
{
Shape controlAll = (Shape)sender; 
controlAll.Growing = 50;
}
private void Grow(object sender, EventArgs e)
{
Shape controlAll = (Shape)sender; 
controlAll.Growing = 50;
}

Ramy Mahrous

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Postaholic

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since Aug 2006

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Aug 13th, 2008

Re: Accesing variable/function in Control using (Control)Sender

your good idol

nevoj

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Aug 13th, 2008

Re: Accesing variable/function in Control using (Control)Sender

but do you know how to access an object that had been done through a instance for example when i click a button it will create a list box then how can i get the selected item of that list box

nevoj

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Aug 15th, 2008

Re: Accesing variable/function in Control using (Control)Sender

Very easy, I'll write code, when user presses on the button, it creates object fron ListBox type and create an event for it also...

c# Syntax (Toggle Plain Text)
private void Grow(object sender, EventArgs e)
{
ListBox lstBoxForItems = new ListBox();
lstBoxForItems.Items.Add("1");
lstBoxForItems.Items.Add("2");
lstBoxForItems.Items.Add("3");
lstBoxForItems.Show();
this.Controls.Add(lstBoxForItems);
lstBoxForItems.SelectedIndexChanged += new EventHandler(lstBoxForItems_SelectedIndexChanged);
        }
 
        void lstBoxForItems_SelectedIndexChanged(object sender, EventArgs e)
        {
            MessageBox.Show(lstBoxForItems.SelectedItem.ToString());
        }
private void Grow(object sender, EventArgs e)
{
ListBox lstBoxForItems = new ListBox();
lstBoxForItems.Items.Add("1");
lstBoxForItems.Items.Add("2");
lstBoxForItems.Items.Add("3");
lstBoxForItems.Show();
this.Controls.Add(lstBoxForItems);
lstBoxForItems.SelectedIndexChanged += new EventHandler(lstBoxForItems_SelectedIndexChanged);
        }

        void lstBoxForItems_SelectedIndexChanged(object sender, EventArgs e)
        {
            MessageBox.Show(lstBoxForItems.SelectedItem.ToString());
        }

Ramy Mahrous

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Solved Threads: 276

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