VB.NET & IsNothing()

Author: admin | Posted: 06-06-2010 | Category: VB.NET & Check Type Function

VB.NET & IsNothing() - IsNothing() : Returns a Boolean value indicating whether an expression has no object assigned to it.

ShotDev Focus:
- VB.NET & IsNothing()

Example

IsNothing.aspx

<%@ Page Language="VB" %>
<script runat="server">

Sub Page_Load(sender As Object, e As EventArgs)
Dim strVar1,strVar2,strVar3,strVar4
strVar1 = ""
strVar2 = "ShotDev.Com"
strVar3 = Nothing
'strVar4 =
Me.lblText1.Text  = IsNothing(strVar1)
Me.lblText2.Text  = IsNothing(strVar2)
Me.lblText3.Text  = IsNothing(strVar3)
Me.lblText4.Text  = IsNothing(strVar4)
End Sub

</script>
<html>
<head>
<title>ShotDev.Com Tutorial</title>
</head>
<body>
<form runat="server">
<asp:Label id="lblText1" runat="server"></asp:Label><br />
<asp:Label id="lblText2" runat="server"></asp:Label><br />
<asp:Label id="lblText3" runat="server"></asp:Label><br />
<asp:Label id="lblText4" runat="server"></asp:Label><br />
</form>
</body>
</html>

Screenshot

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Download this script.