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Trying to SUM listbox items, but getting "Conversion from type 'ListItem' to type 'String' is not valid". Need someone to check code.

Hello,
can someone please advise what I'm doing wrong. I have try many solutions, but just cannot get out from error like:
"Conversion from type 'ListItem' to type 'String' is not valid", or
Conversion from type 'ListItem' to type 'Double' is not valid, or
Conversion from type 'ListItem' to type 'Integer' is not valid, etc

Dim result As Double = Math.Round((TextBoxA.Text + TextBoxB.Text, 1)
        MsgBox(result)
        Dim Pcs As String = result * TextBoxC.Text
        MsgBox(Pcs)
        ListBox1.Items.Add(Pcs)
        Dim sum As Double
        For Each item As String In ListBox1.Items
            sum += Double.Parse(item)
        Next

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Thanks in advance for hlep!

Meir Rivkin

Dim result As Double = Math.Round((TextBoxA.Text + TextBoxB.Text, 1)
        MsgBox(result)
        Dim Pcs As String = result * TextBoxC.Text
        MsgBox(Pcs)
        ListBox1.Items.Add(Pcs)
        Dim sum As Double
        For Each item As Object In ListBox1.Items
            sum += Double.TryParse(item.ToString())
        Next

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Meir Rivkin

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dejandejanovic

ASKER

Works perfect! Thanks.

Trying to SUM listbox items, but getting &quot;Conversion from type 'ListItem' to type 'String' is not valid&quot;. Need someone to check code.

Trying to SUM listbox items, but getting "Conversion from type 'ListItem' to type 'String' is not valid". Need someone to check code.