Showing error invalidargument=value of '10' is not valid for 'index'. Parameter name: index

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InvalidArgument=Value of '10' is not valid for 'index'.
Parameter name: index

Please help me when i count how many record are checked or not with this code show error

InvalidArgument=Value of '10' is not valid for 'index'. Parameter name: index

https://ibb.co/eU6Wn9[^]

https://ibb.co/izkD0U

What I have tried:

Dim count As Integer
       For k = 0 To ListView1.Items.Count
           If ListView1.Items(k).Checked = True Then
               count = count + 1
           End If
       Next k
       Label2.Text = count

Posted 10-Sep-18 7:11am

Jayanta Modak

Updated 10-Sep-18 10:46am

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2 solutions

Solution 2

Assuming that it's a WinForm project... A ListView object has got CheckedItems Property (System.Windows.Forms) | Microsoft Docs[^]
So, you don't need to loop through the collection of items in ListView.

VB.NET

Dim countOfcheckedItems = ListView1.CheckedItems.Count()
Label2.Text = countOfcheckedItems

Posted 10-Sep-18 10:46am

Maciej Los

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littleGreenDude · Accepted Answer · 2018-09-10T07:41:00

Solution 1

The index is zero based, so you want to iterate to one less than the number of items

For k = 0 To ListView1.Items.Count-1

Posted 10-Sep-18 7:41am

littleGreenDude

Comments

Maciej Los 10-Sep-18 16:40pm

+5!