Disabling an <asp:TextBox /> in ASP.NET Web Forms

Question

I am working in an ASP.NET WebForms application built in VB.NET.

Depending on the role of the current logged in user I want to disable the TextBox. So If he/she is part of Role A, then he / she will be able to edit the content of the TextBox, otherwise the TextBox is disabled.

<asp:TextBox runat="server" 
             ID="txtResolution" 
             CssClass="newTextObject" 
             TextMode="MultiLine">
</asp:TextBox>

How can I achieve this?

Make sure you do additional server-side checks. A disabled field can be circumvented to allow data entry. — Comfortably Numb
– Comfortably Numb, Commented Oct 8, 2013 at 15:20

Karl Anderson · Accepted Answer · 2013-10-08 15:43:13Z

5

You can use the User.Identity.IsInRole() method to check if the current logged in user is a member of the role you require.

The following code should work in the PageLoad method of the page.

If User.Identity.IsInRole("Role A") Then
    txtResolution.Enabled = False
End If

See MSDN documentation of HttpContext.User Property for some more detail on the HttpContext.User property of web applications.

edited Oct 8, 2013 at 15:43

Karl Anderson

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answered Oct 8, 2013 at 15:17

Nunners

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MikeSmithDev · Accepted Answer · 2013-10-08 15:17:11Z

2

Assuming you are using Role Management, you just enable the text box if the user is in Role A.

txtResolution.Enabled = User.IsInRole("A")

MSDN IsInRole method

answered Oct 8, 2013 at 15:17

MikeSmithDev

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Comments

Karl Anderson · Accepted Answer · 2013-10-08 15:45:41Z

2

You can set the property

To disable:

txtResolution.Enabled = "false"

To enable:

txtResolution.Enabled = "true"

edited Oct 8, 2013 at 15:45

Karl Anderson

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answered Oct 8, 2013 at 15:18

Dushyant

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