Eventhandle !!!

[RongNK]

When I am declare "private Label[,] life = new Label[20, 20];" And "life[i,j].Click += new System.EventHandler(ClickLaBel)" A problem was occured : "Error 1 Use of unassigned local variable 'j'" I don't know why ? Can somebydy help me ! :confused::confused::confused: Sorry for my english. Thank for all support !

[Wendelius]

breakvn wrote:

Use of unassigned local variable 'j'

J doesn't have a value when you are registering the event. First assign a value for j (and i).

The need to optimize rises from a bad design.My articles[^]

modified on Thursday, January 8, 2009 11:26 AM

[Le centriste]

Did you assign Label instances in your array? Initializing the array initializes all members to null.

[Luc Pattyn]

breakvn wrote:

Use of unassigned local variable 'j'

means j has no value yet (it is local, hence not initially zero), yet you are already reading and using it. :)

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[RongNK]

Thank . So ,can you tell me how to use eventhander ... I need detail . Thank :)

[Wendelius]

You could try something like (don't mind about the typos):

Label tempLabel;

for (int i = 0; i<20; i++) {
for (int j = 0; j<20; j++) {
tempLabel = new Label();
tempLabel.Click += new System.EventHandler(ClickLabel)
life[i,j] = tempLabel;
}
}

The need to optimize rises from a bad design.My articles[^]