C#

Seraphin wrote:

Hello, I want to call a method which accepts an array. I've defined an array (originalArray) and want work with it within the method CheckArray. But if I change something within the array inside the method, the original array will be modified too. I thought the parameters are ByValue automatically? Isn't it?

private void button4_Click(object sender, System.EventArgs e)
{
    CheckArray(originalArray);
}

private void CheckArray(int[,] iArray)
{
    int[,] copyArray = iArray;
    copyArray[0,0] = 0;
} 

private void button4_Click(object sender, System.EventArgs e)
{
    CheckArray(originalArray);
}

private void CheckArray(int[,] iArray)
{
    iArray = new int[10, 10];
    iArray[0, 0] = 0;
} 

private void button4_Click(object sender, System.EventArgs e)
{    
    CheckArray(ref originalArray);
}

private void CheckArray(ref int[,] iArray)
{    
    iArray = new int[10, 10];    
    iArray[0, 0] = 0;
} 

int[] arrayA = new int[10];
int[] arrayB = arrayA;  

// Both arrayA and arrayB reference the same array.

// An operation on the array via the arrayA reference variable.
// Does not affect arrayB.
arrayA[0] = 42;

// An operation on the arrayA reference variable itself.
arrayA = null;

// This will print 42 because the arrayB reference variable
// still points to the array.
Console.WriteLine(arrayB[0]);

The Undefeated wrote:

ps. what exactly does the DirectX redistributable do? It doesnt let me run the app.

string labeltext = this.label1.Text;<br />
			int length = labeltext.Length;<br />
			<br />
			if(length > 35)<br />
			{<br />
				labeltext = labeltext.Remove(32, length - 32) + "...";<br />
			}<br />
			<br />
				this.label1.Text = labeltext;