How can i change the switch width in xamarin forms switch?
tried with adding render class to android but couldn't found a way to do that.
-------this is the Render class in android
[assembly: ExportRenderer(typeof(ExtendedSwitch), typeof(ExtendedSwitchRenderer))]
namespace Common.Droid.Renderers
{
public class ExtendedSwitchRenderer : SwitchRenderer
{
public ExtendedSwitchRenderer(Context context)
: base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<Switch> e)
{
base.OnElementChanged(e);
if (Control != null && e.NewElement != null)
{
var element = (ExtendedSwitch) e.NewElement;
Control.TextOn = element.YesText ?? string.Empty;
Control.TextOff = element.NoText ?? string.Empty;
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
Control.SwitchMinWidth = 300;
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == ExtendedSwitch.YesTextProperty.PropertyName ||
e.PropertyName == ExtendedSwitch.NoTextProperty.PropertyName)
{
var element = (ExtendedSwitch) Element;
Control.TextOn = element.YesText ?? string.Empty;
Control.TextOff = element.NoText ?? string.Empty;
}
Control.SwitchMinWidth = 300;
}
}
}
Related
I'm using a custom WebViewRenderer in my Xamarin Forms android project that looks like this:
[assembly: ExportRenderer(typeof(Xamarin.Forms.WebView), typeof(HybridWebViewRenderer))]
namespace ClotureSiadForms.Droid.Renderer
{
internal class HybridWebViewRenderer : WebViewRenderer
{
public HybridWebViewRenderer(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
{
base.OnElementChanged(e);
if (Control != null)
{
Control.Settings.JavaScriptEnabled = true;
Control.Settings.DomStorageEnabled = true;
Control.Settings.SavePassword = true;
}
}
}
}
I checked that it is well used, however passwords are still not saved. When I write login and password on the webpage, it asks is Google should save them, I press "yes" but next time sign in data is not proposed, what should I check ?
Please try the OnElementChanged method like below.
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
{
base.OnElementChanged(e);
if (e.NewElement != null)
{
Control.Settings.JavaScriptEnabled = true ;
Control.Settings.DomStorageEnabled = true ;
Control.Settings.SavePassword = true;
}
}
I have an Xamarin.Forms app that supports many languages. How do I show the Calender for the DatePicker with DatePicker Ok and Cancel button text in local language text from resource file?
My custom renderer
[assembly: ExportRenderer(typeof(CustomImageDatePicker), typeof(CustomImageDatePickerRenderer))]
namespace AMS.Droid.Renderers
{
public class CustomImageDatePickerRenderer : DatePickerRenderer
{
public CustomImageDatePickerRenderer(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<DatePicker> e)
{
try
{
base.OnElementChanged(e);
CustomImageDatePicker element = (CustomImageDatePicker)this.Element;
if (Control == null)
return;
Control.Background = null;
if (Control != null && this.Element != null && !string.IsNullOrEmpty(element.Image))
{
Control.Background = AddPickerStyles(element.Image);
}
}
catch (Exception ex)
{
var message = ex.Message;
}
}
public LayerDrawable AddPickerStyles(string imagePath)
{
GradientDrawable gd = new GradientDrawable();
gd.SetColor(Android.Graphics.Color.Transparent);
gd.SetCornerRadius(25);
gd.SetStroke(3, Android.Graphics.Color.Black);
this.Control.SetBackgroundColor(Android.Graphics.Color.Transparent);
this.Control.SetPadding(20, 10, -50, 10);
Drawable[] layers = { gd, GetDrawable(imagePath) };
LayerDrawable layerDrawable = new LayerDrawable(layers);
layerDrawable.SetLayerInset(1, 0, 0, 30, 0);
return layerDrawable;
}
private BitmapDrawable GetDrawable(string imagePath)
{
try
{
int resID = Resources.GetIdentifier(imagePath.ToLower(), "drawable", this.Context.PackageName);
var drawable = ContextCompat.GetDrawable(this.Context, Resource.Drawable.brandIcon);
drawable.SetBounds(0, 0, (int)(drawable.IntrinsicWidth * 0.5),
(int)(drawable.IntrinsicHeight * 0.5));
var bitmap = ((BitmapDrawable)drawable).Bitmap;
var result = new BitmapDrawable(Resources, Bitmap.CreateScaledBitmap(bitmap, 60, 60, true));
result.Gravity = Android.Views.GravityFlags.Right;
//result.SetBounds(10, 10, 50, 0);
return result;
}
catch(Exception ex)
{
var message = ex.Message;
}
return null;
}`
Xaml:
<customDatePicker:CustomDatePicker
x:Name="dpFromDate"
DateSelected="FromDate_Selected"
Margin="10,5,10,0"
Image="brandIcon.png"/>
You could do this with custom renderer.
On Android, the DatePicker dialog can be customized by overriding the CreateDatePickerDialog method in a custom renderer.
[assembly: ExportRenderer(typeof(Xamarin.Forms.DatePicker), typeof(CustomDatePickerRenderer))]
namespace App10.Droid
{
public class CustomDatePickerRenderer : DatePickerRenderer
{
public CustomDatePickerRenderer(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.DatePicker> e)
{
base.OnElementChanged(e);
//Disposing
if (e.OldElement != null)
{
datePicker = null;
}
//Creating
if (e.NewElement != null)
{
datePicker = e.NewElement;
}
}
DatePickerDialog pickerDialog;
private Xamarin.Forms.DatePicker datePicker;
protected override DatePickerDialog CreateDatePickerDialog(int year, int month, int day)
{
pickerDialog = new DatePickerDialog(Context, (o, e) =>
{
datePicker.Date = e.Date;
((IElementController)datePicker).SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
}, year, month, day);
//ok
pickerDialog.SetButton((int)DialogButtonType.Positive, "(FR)-DONE", OnDone);
//cancel
pickerDialog.SetButton((int)DialogButtonType.Negative, "(FR)-CLEAR", OnCancel);
return pickerDialog;
}
private void OnCancel(object sender, DialogClickEventArgs e)
{
datePicker.Unfocus();
}
private void OnDone(object sender, DialogClickEventArgs e)
{
datePicker.Date = ((DatePickerDialog)sender).DatePicker.DateTime;
datePicker.Unfocus();
}
}
}
You could replace the (FR)-DONE and (FR)-CLEAR with your own local language text from resource file
//ok
pickerDialog.SetButton((int)DialogButtonType.Positive, "(FR)-DONE", OnDone);
//cancel
pickerDialog.SetButton((int)DialogButtonType.Negative, "(FR)-CLEAR", OnCancel);
I would like to add very simple, temporary security to my site.
I made a page at Home/UnderConstruction where people testing the site can enter a hard-coded password which will then set the "underconstruction" session variable to "false".
This is what I have so far, but it results in too many redirects:
protected void Session_Start(Object sender, EventArgs e)
{
HttpContext.Current.Session["underconstruction"] = "true";
}
protected void Application_AcquireRequestState(Object sender, EventArgs e)
{
if (HttpContext.Current != null && HttpContext.Current.Session != null)
{
var underconstruction = HttpContext.Current.Session["underconstruction"];
if (underconstruction != null)
{
string oc = underconstruction.ToString();
if (oc != "false") Response.Redirect("~/Home/UnderConstruction");
}
}
}
Is this close to what I would need to do?
Here is the code we got to work:
Controller Code for UnderConstruction View
public ViewResult UnderConstruction()
{
return View();
}
[HttpPost]
public ActionResult UnderConstruction(string ocp)
{
if (ocp == "mypassword")
{
Session["underconstruction"] = "false";
return RedirectToAction("Index", "Home");
}
else
{
Session["beingredirected"] = "false";
return View();
}
}
Global.Asax
protected void Session_Start(Object sender, EventArgs e)
{
HttpContext.Current.Session["underconstruction"] = "true";
HttpContext.Current.Session["beingredirected"] = "false";
}
protected void Application_AcquireRequestState(Object sender, EventArgs e)
{
if (HttpContext.Current != null && HttpContext.Current.Session != null)
{
bool uc = false;
var underconstruction = HttpContext.Current.Session["underconstruction"];
if (underconstruction != null)
{
uc = Boolean.Parse(underconstruction.ToString());
}
bool redirected = false;
var beingredirected = HttpContext.Current.Session["beingredirected"];
if (beingredirected != null)
{
redirected = Boolean.Parse(beingredirected.ToString());
}
if (uc && !redirected)
{
if (Request.HttpMethod == "GET")
{
HttpContext.Current.Session["beingredirected"] = "true";
Response.Redirect("~/Home/UnderConstruction");
}
else if (Request.HttpMethod == "POST")
{
}
}
HttpContext.Current.Session["beingredirected"] = "false";
}
}
Is ~/Home/UnderConstruction in a different website? If not, wont it always redirect because oc will always be true? ie - do you also need to add a check for the page you're requesting so you can bypass the redirect if already going to the UnderConstruction page?
UPDATE
Not sure if checking the page name is a great idea, but something like this might work:
protected void Session_Start(Object sender, EventArgs e)
{
HttpContext.Current.Session["underconstruction"] = "true";
HttpContext.Current.Session["beingredirected"] = "false";
}
protected void Application_AcquireRequestState(Object sender, EventArgs e)
{
if (HttpContext.Current != null && HttpContext.Current.Session != null)
{
bool uc = false;
var underconstruction = HttpContext.Current.Session["underconstruction"];
if (underconstruction != null)
{
uc = Boolean.Parse(underconstruction);
}
bool redirected = false;
var beingredirected = HttpContext.Current.Session["beingredirected"];
if (beingredirected != null)
{
redirected = Boolean.Parse(beingredirected);
}
if (uc && !redirected)
{
HttpContext.Current.Session["beingredirected"] = "true";
Response.Redirect("~/Home/UnderConstruction");
}
HttpContext.Current.Session["beingredirected"] = "false";
}
}
Note that I would clean that up, that example was to just give the general idea.
UPDATE
If you want to use roles as mentioned in the comments, then this article from ScottGu's Blog may help. Its a little more complicated, but has the added benefit of not introducing temporary code as the above solution will
I want to create a label that implements the IPostBackDataHandler, because I want to change the text with javascript. If I trigger a postback after that, than my text is gone.
The code that I already have is this:
public class CustomLabel : Label, IPostBackDataHandler
{
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
if (Page != null)
Page.RegisterRequiresPostBack(this);
}
public bool LoadPostData(string postDataKey, System.Collections.Specialized.NameValueCollection postCollection)
{
this.Text = postCollection[postDataKey];
return true;
}
public void RaisePostDataChangedEvent()
{
//throw new NotImplementedException();
}
}
It is not working at all, I don't get how I should see that the text is changed and PostCollection[postDataKey] is always null.
The IPostBackDataHandler interface is intended for inputs. Elements like spans and divs don't get stored in the request object. I would just implement the necessary ViewState management methods. Here's an example from a custom grid component that I developed:
protected override void LoadViewState(object savedState)
{
if (savedState != null)
{
object[] state = (object[])savedState;
if (state[0] != null)
base.LoadViewState(state[0]);
if (state[1] != null)
((IStateManager)ItemStyle).LoadViewState(state[1]);
if (state[2] != null)
((IStateManager)headerStyle).LoadViewState(state[2]);
if (state[3] != null)
((IStateManager)AlternatingItemStyle).LoadViewState(state[3]);
}
}
protected override object SaveViewState()
{
object[] state = new object[4];
state[0] = base.SaveViewState();
state[1] = itemStyle != null ? ((IStateManager)itemStyle).SaveViewState() : null;
state[2] = headerStyle != null ? ((IStateManager)headerStyle).SaveViewState() : null;
state[3] = alternatingItemStyle != null ? ((IStateManager)alternatingItemStyle).SaveViewState() : null;
return state;
}
protected override void TrackViewState()
{
base.TrackViewState();
if (itemStyle != null)
((IStateManager)itemStyle).TrackViewState();
if (headerStyle != null)
((IStateManager)headerStyle).TrackViewState();
if (alternatingItemStyle != null)
((IStateManager)alternatingItemStyle).TrackViewState();
}
I need a way to save and load the Page State in a persistent manner (Session). The Project i need this for is an Intranet Web Application which has several Configuration Pages and some of them need a Confirmation if they are about to be saved. The Confirmation Page has to be a seperate Page. The use of JavaScript is not possible due to limitations i am bound to. This is what i could come up with so far:
ConfirmationRequest:
[Serializable]
public class ConfirmationRequest
{
private Uri _url;
public Uri Url
{ get { return _url; } }
private byte[] _data;
public byte[] Data
{ get { return _data; } }
public ConfirmationRequest(Uri url, byte[] data)
{
_url = url;
_data = data;
}
}
ConfirmationResponse:
[Serializable]
public class ConfirmationResponse
{
private ConfirmationRequest _request;
public ConfirmationRequest Request
{ get { return _request; } }
private ConfirmationResult _result = ConfirmationResult.None;
public ConfirmationResult Result
{ get { return _result; } }
public ConfirmationResponse(ConfirmationRequest request, ConfirmationResult result)
{
_request = request;
_result = result;
}
}
public enum ConfirmationResult { Denied = -1, None = 0, Granted = 1 }
Confirmation.aspx:
protected void Page_Load(object sender, EventArgs e)
{
if (Request.UrlReferrer != null)
{
string key = "Confirmation:" + Request.UrlReferrer.PathAndQuery;
if (Session[key] != null)
{
ConfirmationRequest confirmationRequest = Session[key] as ConfirmationRequest;
if (confirmationRequest != null)
{
Session[key] = new ConfirmationResponse(confirmationRequest, ConfirmationResult.Granted);
Response.Redirect(confirmationRequest.Url.PathAndQuery, false);
}
}
}
}
PageToConfirm.aspx:
private bool _confirmationRequired = false;
protected void btnSave_Click(object sender, EventArgs e)
{
_confirmationRequired = true;
Response.Redirect("Confirmation.aspx", false);
}
protected override void SavePageStateToPersistenceMedium(object state)
{
if (_confirmationRequired)
{
using (MemoryStream stream = new MemoryStream())
{
LosFormatter formatter = new LosFormatter();
formatter.Serialize(stream, state);
stream.Flush();
Session["Confirmation:" + Request.UrlReferrer.PathAndQuery] = new ConfirmationRequest(Request.UrlReferrer, stream.ToArray());
}
}
base.SavePageStateToPersistenceMedium(state);
}
I can't seem to find a way to load the Page State after being redirected from the Confirmation.aspx to the PageToConfirm.aspx, can anyone help me out on this one?
If you mean view state, try using Server.Transfer instead of Response.Redirect.
If you set the preserveForm parameter
to true, the target page will be able
to access the view state of the
previous page by using the
PreviousPage property.
use this code this works fine form me
public class BasePage
{
protected override PageStatePersister PageStatePersister
{
get
{
return new SessionPageStatePersister(this);
}
}
protected void Page_PreRender(object sender, EventArgs e)
{
//Save the last search and if there is no new search parameter
//Load the old viewstate
try
{ //Define name of the pages for u wanted to maintain page state.
List<string> pageList = new List<string> { "Page1", "Page2"
};
bool IsPageAvailbleInList = false;
foreach (string page in pageList)
{
if (this.Title.Equals(page))
{
IsPageAvailbleInList = true;
break;
}
}
if (!IsPostBack && Session[this + "State"] != null)
{
if (IsPageAvailbleInList)
{
NameValueCollection formValues = (NameValueCollection)Session[this + "State"];
String[] keysArray = formValues.AllKeys;
if (keysArray.Length > 0)
{
for (int i = 0; i < keysArray.Length; i++)
{
Control currentControl = new Control();
currentControl = Page.FindControl(keysArray[i]);
if (currentControl != null)
{
if (currentControl.GetType() == typeof(System.Web.UI.WebControls.TextBox))
((TextBox)currentControl).Text = formValues[keysArray[i]];
else if (currentControl.GetType() == typeof(System.Web.UI.WebControls.DropDownList))
((DropDownList)currentControl).SelectedValue = formValues[keysArray[i]].Trim();
else if (currentControl.GetType() == typeof(System.Web.UI.WebControls.CheckBox))
{
if (formValues[keysArray[i]].Equals("on"))
((CheckBox)currentControl).Checked = true;
}
}
}
}
}
}
if (Page.IsPostBack && IsPageAvailbleInList)
{
Session[this + "State"] = Request.Form;
}
}
catch (Exception ex)
{
LogHelper.PrintError(string.Format("Error occured while loading {0}", this), ex);
Master.ShowMessageBox(enMessageType.Error, ErrorMessage.GENERIC_MESSAGE);
}
}
}