Implement authorization in win forms

[parez]

Whats the best way of implementing authorization in a win forms
application.
I mean things like show/hide or enable/disable Save button ,creating
context menus etc.

[Marc Gravell]

Curoious - even though it accepts multiple ProvideProperty Attribute
declarations, only the first is used... never mind; change the
[ProvideProperty] line to:

[ProvideProperty ("Role", typeof(Componen t))]

Marc

[stv.dmsk]

On Apr 10, 10:49*pm, parez <psaw...@gmail. comwrote:

Whats the best way of implementingaut horizationin a win forms
application.
I mean things like *show/hide or enable/disable Save button ,creating
context menus *etc.

Hi,

Visual Guard .Net is probably a good solution:

http://www.visual-guard.com/EN/.net-...ion-tool#admin

[parez]

On Apr 14, 4:01 pm, Marc Gravell <marc.grav...@g mail.comwrote:

I just one more issue... If a control has sub-control(compone nt) then
it does not show up for the sub components.
e.g MenuStrip control has ToolStripMenuIt em children. How do I make
it show up(in properties) for those controls.

I suspect that is because ToolStripMenuIt em isn't a Control, and I
restricted it to Controls; Changed as below (I also removed the events
stuff - didn't seem necessary in hindsight):

[ProvideProperty ("Role", typeof(Control) )]
[ToolboxItemFilt er("System.Wind ows.Forms")]
[Description("Pr ovides automatic role-checking")]
public class RoleDisabler : Component, IExtenderProvid er
{
private Dictionary<obje ct, stringmap
= new Dictionary<obje ct, string>();
[DefaultValue("" )]
public string GetRole(object obj)
{
if (obj == null) return "";
string role;
map.TryGetValue (obj, out role);
return role ?? "";
}
public void SetRole(object obj, string role)
{
if (obj == null) return;
if (string.IsNullO rEmpty(role))
{
map.Remove(obj) ;
}
else
{
map[obj] = role;
}
if (!DesignMode)
{
SetEnabled(obj) ;
}
}
private void SetEnabled(obje ct obj)
{
if (DesignMode || obj == null) return;
string role;
if (map.TryGetValu e(obj, out role))
{
IPrincipal principal = Thread.CurrentP rincipal;
bool isInRole = principal == null ? false :
principal.IsInR ole(role);
if (obj is Control)
{
((Control)obj). Enabled = isInRole;
}
else if (obj is ToolStripItem)
{
((ToolStripItem )obj).Enabled = isInRole;
}
}
}
bool IExtenderProvid er.CanExtend(ob ject obj)
{
return obj is Control || obj is ToolStripItem;
}

}

Hi Marc,

I added the following to the RoleDisabler .. and now it also enables /
disables everytime my permission changes..
Thanks again..

private void HookUpEventhand lers()
{

UserAccessInfo. UserPermissions Updated += new
EventHandler<Ev entArgs>(UserAc cessInfo_UserPe rmissionsUpdate d);
}

void UserAccessInfo_ UserPermissions Updated(object sender,
EventArgs e)
{
foreach (object obj in map.Keys)
{
try
{
SetEnabled(obj) ;
}
catch(Exception ex)
{

Trace.WriteLine If(Logger.Insta nce.TraceSwitch .TraceError,
ExceptionUtilit y.GetInnerMostE xception(ex).Me ssage);
}
}
}

[Martin]

Hi Marc

Firstly thanks for posting your code - it's proving very useful for me (and many others I'm sure).

I've tested the code on my forms and it seems to deal very well with most things but "falls down" a little with things like datagridviews etc where more than one property would be bound - the code you've posted can happily enable/disable the entire control (i.e. all cols) but how would you go about hiding/making readonly some columns dependent on roles (i.e. "CanView"/"CanEdit" type properties?

Thanks in advance
Martin