C# int.TryParse Maybe?

Question

So this is an error I've been trying to figure out but can not seem to fix. . This is in one function.

File.Copy(item.FileName, mcAD [VersionText.Tag], true);

private void Version_2_0_Click(object sender, EventArgs e)
{
    string Version_2_0_Selected = VersionText.Text = "Version 2.0";
    VersionText.Tag = 2;
}

But VersionText.Tag in the first part always gives me this error.

enter image description here

I heard something with int.TryParse, but I can not figure out how to implement it into my code.

I hope I explained it enough.

What is this supposed to do: string Version_2_0_Selected = VersionText.Text = "Version 2.0"; — Dimitar Dimitrov
– Dimitar Dimitrov, Commented Jul 31, 2013 at 4:37
@LeeTaylor Woah ! Honestly, I didn't even know that's valid syntax. Awesome. — Dimitar Dimitrov
– Dimitar Dimitrov, Commented Jul 31, 2013 at 4:39

Matthew · Accepted Answer · 2013-07-31 04:37:47Z

7

My assumption of the problem is on the line

File.Copy(item.FileName, mcAD [VersionText.Tag], true);

specifically mcAD [VersionText.Tag].

.Tag returns type object, but the array indexer expects int.

If you cast it, it should hopefully get rid of the compile error at least.

File.Copy(item.FileName, mcAD [(int)VersionText.Tag], true);

If VersionText.Tag doesn't contain an integer, you'll get a runtime error, however.

answered Jul 31, 2013 at 4:37

Matthew

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15 Comments

leppie Over a year ago

+1: With all the other poor answers, this is the only correct one.

cnd Over a year ago

agreed with @leppie )

Matthew H Over a year ago

That did it! I'll test now! :D @Matthew prntscr.com/1iirtr this is what happened

user1429899 Over a year ago

In order to avoid possible runtime error you can use int.TryParse method. Something like this: int result = -1; Int32.TryParse(VersionText.Tag, out result); if (result != -1) {//your code}

Cole Tobin Over a year ago

@MatthewH in that case, it's best to show us the format of VersionText in your question. I.e. how the variables are declared.

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