using generic procedures

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VB.NET Syntax (Toggle Plain Text)
 
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim x As Int16, y As Int16
        x = CInt(TextBox1.Text)
        y = CInt(TextBox2.Text)
        add(10, 20)
    End Sub
 
 
    Private Sub add(Of T)(ByVal x As T, ByVal y As T)
        Dim res As T
        res = x + y
        MsgBox(res)
    End Sub
 
    Private Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim x As Double, y As Double
        x = CDbl(TextBox1.Text)
        y = CDbl(TextBox2.Text)
 
        add(4.5, 5.6)
    End Sub
 
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim x As Int16, y As Int16
        x = CInt(TextBox1.Text)
        y = CInt(TextBox2.Text)
        add(10, 20)
    End Sub


    Private Sub add(Of T)(ByVal x As T, ByVal y As T)
        Dim res As T
        res = x + y
        MsgBox(res)
    End Sub

    Private Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim x As Double, y As Double
        x = CDbl(TextBox1.Text)
        y = CDbl(TextBox2.Text)

        add(4.5, 5.6)
    End Sub

This is the code i used but there is an error " Operator + not defined for datatype 'T' and 'T' ". what is wrong in this. thanks in advance

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uma625010

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Oct 4th, 2008

Re: using generic procedures

Quote ...

VB.NET Syntax (Toggle Plain Text)
 Private Sub add(Of T)(ByVal x As T, ByVal y As T)
        Dim res As T
        res = x + y
        MsgBox(res)
    End Sub
Private Sub add(Of T)(ByVal x As T, ByVal y As T) Dim res As T res = x + y MsgBox(res) End Sub

what type T ??

manal

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since Mar 2006

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Oct 5th, 2008

Re: using generic procedures

Click to Expand / Collapse Quote originally posted by manal ...

what type T ??

T is to accept any data type that we pass as the argument. that is the main advantage of generics in .net. the following code works fine, but doesnot allow the + opertor.

VB.NET Syntax (Toggle Plain Text)
 
Private Sub add(Of T)(ByVal x As T, ByVal y As T)
        'Dim res As T
        'res = x + y
        MsgBox("The values are " & x.ToString & ", " & y.ToString)
 
    End Sub
 
Private Sub add(Of T)(ByVal x As T, ByVal y As T)
        'Dim res As T
        'res = x + y
        MsgBox("The values are " & x.ToString & ", " & y.ToString)

    End Sub

uma625010

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