Convert IList to integer

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I have a list like

C#

IList<BackPlanes> backplanes =
                  panel.Items.Where(x => x is BackPlanes).OrderBy(x => x.Index).Cast<BackPlanes>().ToList();

backplanes = backplanes - 1;

I am getting an error like Operator - cannot be applied to operands of type System.Collections.Generic.IList<domain.generatecontrols.backplanes> and int.

C#

foreach (KeyValuePair<double, double> drop in DrawFrame)
                                     {
                                        if (backplanes.Count <= 0) break;

                                         Shape framecabl = panelSheet.Drop(frameCable, drop.Key, drop.Value);
                                         framecabl.Text = terminalBoxSummary.ToString();
                                         backplanes = backplanes-1;
                                     }

Posted 30-Dec-14 22:00pm

chandra sekhar

Updated 30-Dec-14 22:14pm

v3

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Snesh Prajapati 31-Dec-14 4:06am

what you want to do by doing that minus operation ?

chandra sekhar 31-Dec-14 4:07am

if (backplanes <= 0) break;

[no name] 31-Dec-14 4:19am

Here you can not use the minus operator as the left argument is a list of data and right argument is an integer. As Snesh mentioned you can get the length of the list and you can use the minus operator there.

BillWoodruff 31-Dec-14 4:56am

I think you need to re-think your logic here: why create a List of BackPlanes only to destroy it ?

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Snesh Prajapati · Answer 1 · 2014-12-30T22:09:00

Solution 1

As we discussed, then you should write:

C#

if (backplanes.Count <= 0) break;

To remove first element you can use (instead of "backplanes = backplanes-1;")

C#

backplanes.RemoveAt(0);

//or use following code:
for(int i=0; i< backplanes.Count; i++ )
{
// your operations here....
}

For more: http://msdn.microsoft.com/en-us/library/5cw9x18z.aspx[^]

Posted 30-Dec-14 22:09pm

Snesh Prajapati

Updated 30-Dec-14 22:28pm

v4

Comments

chandra sekhar 31-Dec-14 4:11am

I have updated the question.

Snesh Prajapati 31-Dec-14 4:19am

I undated the solution....that will keep removing first element of existing list.

chandra sekhar 31-Dec-14 4:23am

Its not like removing the first element if the backplanes is 0 it has to break,decreasing the counter.

Snesh Prajapati 31-Dec-14 4:26am

the better use "for" loop based on backplanes.Count. I will provide the code in solution.