How to enable/disable controls against a user's permission via Type Casting

[sanndeb]

I want to enable/disable controls of a asp.net page against a logged in user's permission. say 'admin' & 'hr' can change user's birth date text-box in a page but others will see the text-box as disabled.

so i wrote a function like this

[Flags]
    public enum UserRoles
    {
        GroupLead = 0x2,
        WebAdmin = 0x4,
        Developers = 0x8,
        Hr = 0x10,
        Accounts = 0x20,
        ItInfra= 0x40
    }
  
    public static class UserPermission
    {
        public static bool IsPorpertySupport(int empId, UserRoles[] uRoles)
        {
            // inner logics to return true or false acc. as the user is in the specified roles(s) or not.
        }
    }

And from page i'll call it like this

tblAddGrInfo.Visible = UserPermission.IsPorpertySupport(Convert.ToInt16(User.Identity.Name),new[] {UserRoles.Hr, UserRoles.WebAdmin});

But now for many controls (like a textbox, a dropdownlist, a label, a grid etc.) in the page i thought of a function like

public static bool SetEnable(int empId,  System.Web.UI.Control[] ctrlCol, UserRoles uRole)
{
     try
     {
        foreach (var c in ctrlCol)
           [I][B][U]c.Enabled = IsPorpertySupport(empId, new [] {uRole});[/U][/B][/I] // ERROR LINE
        return true;
      }
      catch (Exception)
      {
         return false;
      }
}

But the problem is a control don't have Enabled property... you have to cast it to its proper type...
My question is how do i do that? Writing cases for each control (textbox, dropdownlist, grid, checkbox, radiobutton etc) is hard to do... Is there a shorter way?

Currently i'm using it in page load like

var isUserHr = UserPermission.IsPorpertySupport(Convert.ToInt16(User.Identity.Name), new[] { UserRoles.Hr });
txtEmployeeDOB.Enabled = isUserHr; //TextBox
txtEmployeePANNo.Enabled = isUserHr;
txtEmployeePassportNo.Enabled = isUserHr;
txtEmployeeFirstName.Enabled = isUserHr;
txtEmployeeLastName.Enabled = isUserHr;
txtEmployeeBankAccNo.Enabled = isUserHr;
txtEmployeePFAccNo.Enabled = isUserHr;
chkIsEmployeeActive.Enabled = isUserHr; //CheckBox
ddlPaysleepDesg.Enabled = isUserHr; //DropDownList
ddlWorkingDesg.Enabled = isUserHr; //DropDownList

but if control increases it's going to be difficult...

[Frinavale]

If I were you I would use Reflection.

First thing you need to do is import the Reflection namespace:

using System.Reflection;

Then you need to use reflection to retrieve all the properties of the control (Enabled is a property). To retrieve the properties for the control you will use the Control's Type and call the GetProperties() method. This method returns an array of PropertyInfo types. Once you have this array, you need to retrieve the PropertyInfo type that represents the Enabled property (if there is one). If you are able to retrieve the Enabled-PropertyInfo type then you can use it to set the value for your control.

See the comments in the code for a more detailed explanation:

//retrieving whether or not the control should be enabled
bool isUserHr = UserPermission.IsPorpertySupport(Convert.ToInt16(User.Identity.Name), new[] { UserRoles.Hr });

//looping through each control 
foreach (var ctrl in ctrlCol)
{
  //grabbing all of the properties for the control
  PropertyInfo[] properties = ctrl.GetType().GetProperties();
  
  //attempting to retrieve the Enabled property for the control
  PropertyInfo enabledProperty = Array.Find(properties, (pi) => string.Compare(pi.Name, "Enabled", true) == 0);

  //checking whether or not there was an Enabled property
  if (enabledProperty != null)
  {
    //if there is an enabled property, setting the
    //control's enabled property to the isUserHr 
    //which indicates whether or not the control should 
    //be enabled
    enabledProperty.SetValue(ctrl, isUserHr, null);
  }
}

-Frinny

[sanndeb]

If I were you I would use Reflection.

First thing you need to do is import the Reflection namespace:

using System.Reflection;

Then you need to use reflection to retrieve all the properties of the control (Enabled is a property). To retrieve the properties for the control you will use the Control's Type and call the GetProperties() method. This method returns an array of PropertyInfo types. Once you have this array, you need to retrieve the PropertyInfo type that represents the Enabled property (if there is one). If you are able to retrieve the Enabled-PropertyInfo type then you can use it to set the value for your control.

See the comments in the code for a more detailed explanation:

//retrieving whether or not the control should be enabled
bool isUserHr = UserPermission.IsPorpertySupport(Convert.ToInt16(User.Identity.Name), new[] { UserRoles.Hr });

//looping through each control 
foreach (var ctrl in ctrlCol)
{
  //grabbing all of the properties for the control
  PropertyInfo[] properties = ctrl.GetType().GetProperties();
  
  //attempting to retrieve the Enabled property for the control
  PropertyInfo enabledProperty = Array.Find(properties, (pi) => string.Compare(pi.Name, "Enabled", true) == 0);

  //checking whether or not there was an Enabled property
  if (enabledProperty != null)
  {
    //if there is an enabled property, setting the
    //control's enabled property to the isUserHr 
    //which indicates whether or not the control should 
    //be enabled
    enabledProperty.SetValue(ctrl, isUserHr, null);
  }
}

-Frinny

Thanks Mate... that was perfect ....

[Frinavale]

:) Glad I could help :)