CODEWITHSUNDEEP
c#arraysbutton
tubu13
tubu13

Reputation: 934

C# iterate on two dimensional array of buttons

Im trying to iterate of a two dimensional array of Buttons like this

Button[,] buttonsArray = new Button[row,col];
foreach(Button button in buttonsArray)
{
   button = new Button();
}

but im getting the next error: "Error Cannot assign to 'button' because it is a 'foreach iteration variable'"

what im doing worng?

Upvotes: 1

Views: 130

Answers (2)

Erik Schierboom
Erik Schierboom

Reputation: 16636

You cannot modify the value of the variable in a foreach loop. To circumvent this, you should use a regular for loop:

for(int i = row; i < row; i++)
{
    for(int j = col; j < col; j++)
    {
       buttonsArray[i, j] = new Button();
    }
}

Upvotes: 1

Jon Skeet
Jon Skeet

Reputation: 1500873

The compiler message says it all - you're trying to assign a new value to button, but the iteration variable (the one declared by a foreach statement) is read-only. A foreach loop can only be used to iterate over the existing content in a collection - it can't be used to change the content in a collection. (Note that if you change the data within an object referred to by the collection, that's not actually changing the value in the collection, which would just be a reference to the object.)

I suspect you really want something more like this:

for (int i = 0; i < row; i++)
{
    for (int j = 0; j < col; j++)
    {
        buttonsArray[i, j] = new Button();
    }
}

Upvotes: 3

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