To get the Confirmation from user, I am using the Confirmation Message Box i.e Ext.net MessageBox to Confirm the Decision of the User using the ButtonConfig, as like below.
private void checkThePolicies()
{
.......
foreach (int policyId in PoliciesDeleted)
{
X.Msg.Confirm( "User Policy", "Do you want to Delete the Policy", new MessageBoxButtonsConfig
{
Yes = new MessageBoxButtonConfig
{
Handler = "#{DirectMethods}.fnSaveTimeOffTypeInAllowance()",
Text = "Yes"
},
No = new MessageBoxButtonConfig
{
Text = "No"
}
}).Show();
........
}
But this message box is showing Only once for Entire loop at last when it's execution is leaving form that Method.
Why this happens? I want to execute the Handler for every Loop by confirming the Decision.
X.Msg.Confifm().Show();
just generates JavaScript to be executed when a browser gets a response from server.
It doesn't send a request to a browser immediately.
Related
I try the new Shell of Xamarin Form 4 for a small project.
I have a list of order, then someone chooses an order and start picking some inventory for this order with barcode. To be simple, I use 2 views and 2 viewmodel.
The process is:
1. User select an order the click a button "pickup"
2. I use ViewModelLocator (TinyIoc) to resolve the correct ViewModel of the pickup view
3. I call Initialize on the new ViewModel and pass some parameters needed. Like a list of items needed to be pickup.
4. Open the view in modal state.
I don't understand that if I change some qty in the list I pass on the second viewmodel, then hit the back button (modal view close). The quantity changed is now in the original viewmodel. How this is possible? I was thinking that passing parameter to a function do not share the same variable but just copy it??
Viewmodel of the first view (look at the Initialize function the List passed and the JobEnCours object)
private async Task GoPickup()
{
Device.BeginInvokeOnMainThread(async () =>
{
if (this.CodeJob != null && this.CodeJob != "")
{
this.IsBusy = true;
PrepChariotSP3ViewModel vm = ViewModelLocator.Resolve<PrepChariotSP3ViewModel>();
await vm.InitializeAsync(this._jobEnCours, this.ComposantesPick.ToList()) ;
await Shell.Current.Navigation.PushAsync(new PrepChariotSP3Page(vm));
this.IsBusy = false;
}
});
}
the the Initialize code on the second Viewmodel (look I set the JobEnCours.Description=Test)
public async Task InitialiseAsync(Job jobEnCours, List<ComposantePick> composantePick)
{
Title = "Ceuillette: " + jobEnCours.CodeProd;
this._jobEnCours = jobEnCours;
this.ComposantesPick = new ItemsChangeObservableCollection<ComposantePick>();
foreach(ComposantePick c in composantePick)
{
this.ComposantesPick.Add(c);
}
jobEnCours.Description = "test";
So, If I do the back button, then in the first VM the JobEnCours.Description is now set to "test" how this is possible?!
Any idea?
I have an activity indicator on xaml page. Initially its IsVisible property is false. I have a button on page. When user click on button it calls a web service to get data. I change the value of IsVisible property to true before calling the service so that activity indicator starts to display on page and after successful calling of service I change its value to again false so that it doesn't show any more on page.
But it is not working. I know the actual problem. When we call the web service the UI thread gets block and it doesn't show the activity indicator.
How I can enable the UI thread when web service gets called so that activity indicator can show on page until we get the data?
Try making your webservice call into an async and await it.
Depending on how you've structured things you may have to use a TaskCompletionSource as the following example demonstrates.
In this example when the button is clicked, the button is made invisible, and the ActivityIndicator is set to IsRunning=True to show it.
It then executes your long running task / webservice in the function ExecuteSomeLongTask using a TaskCompletionSource.
The reason for this is that in our button click code, we have the final lines:-
objActivityIndicator1.IsRunning = false;
objButton1.IsVisible = true;
That stop the ActivityIndicator from running and showing, and also set the button back to a visible state.
If we did not use a TaskCompletionSource these lines would execute immediately after calling the ExecuteSomeLongTask if it was a normal async method / function, and would result in the ActivityIndicator not running and the button still being visible.
Example:-
Grid objGrid = new Grid()
{
};
ActivityIndicator objActivityIndicator1 = new ActivityIndicator();
objGrid.Children.Add(objActivityIndicator1);
Button objButton1 = new Button();
objButton1.Text = "Execute webservice call.";
objButton1.Clicked += (async (o2, e2) =>
{
objButton1.IsVisible = false;
objActivityIndicator1.IsRunning = true;
//
bool blnResult = await ExecuteSomeLongTask();
//
objActivityIndicator1.IsRunning = false;
objButton1.IsVisible = true;
});
objGrid.Children.Add(objButton1);
return objGrid;
Supporting function:-
private Task<bool> ExecuteSomeLongTask()
{
TaskCompletionSource<bool> objTaskCompletionSource1 = new TaskCompletionSource<bool>();
//
Xamarin.Forms.Device.StartTimer(new TimeSpan(0, 0, 5), new Func<bool>(() =>
{
objTaskCompletionSource1.SetResult(true);
//
return false;
}));
//
return objTaskCompletionSource1.Task;
}
You need to do your work in an asynchronous way. Or in other words: Use Asnyc & Await to ensure, that you UI works well during the call.
You can find more informations in the Xamarin Docs.
async and await are new C# language features that work in conjunction
with the Task Parallel Library to make it easy to write threaded code
to perform long-running tasks without blocking the main thread of your
application.
If you need further asistance, please update your question and post your code or what you have tried so far.
I am very new to ASP.NET. I am working on some other developer's Web form. I have been asked to fix a bug which says:
No success message is displayed when user clicks Save button after
adding information to the form (first time or while updating)
There is a Label at the top of the page with ID lblMsgs
<asp:Label ID="lblMsgs" runat="server">
I have added this to the Code behind in the appropriate place:
lblMsgs.Text = "Message Text";
Now, my question is how do I modify the HTML or code behind to make sure that when Save button is clicked, the code checks that the data is saved to the database and displays save successful message on the Web form.
Can you please help by giving example of the code using my label ID above?
Thank you in advance.
That's a pretty vague question, but if your looking for data validation you should look at the built in ASP.NET Validators. This can do client/server side data validation. As for returning a message to the user based on a successful update to the DB, that is going to be solution specific depending on what type of data layer your using.
On your Save button handler, you can add validation logic if whether the data is valid or not.
protected void ValidateSave(object o, EventArgs e){
if (Page.IsValid) {
// Save to DB and notify of update status
var success = SomeDBMethod.Update...
if (success){
DoAlert("Saved Successfully!");
}
}
else { lblMsgs.Text = "Failed"; }
}
// Call client-side alert
private void DoAlert(string message) {
ClientScriptManager cs = Page.ClientScript;
var x = "alertScript";
if (!cs.IsStartupScriptRegistered(cstype, x))
{
String script = string.Format"alert('{0}', message);";
cs.RegisterStartupScript(cstype, x, script, true);
}
}
I have a task board, some person is working on some task, if task is assigned to another person by his manager the first person who is working on the task board, his execution should be stopped, and a message should be displayed that "This task is assigned to some one else."
I tried using following in page load.
//Code Behind
if (!Owner)
{
SomecontrolsToHide();
MessageDisplay(); // JavaScript function call using RegisterStartupScript()
Response.End();
}
protected void MessageDisplay()
{
string dbMessage = "Task is assigned to someone else.";
ClientScriptManager cs = Page.ClientScript;
cs.RegisterStartupScript(typeof(Page), "ShowMessageWrapup_" + UniqueID, "showMessageDisplay('','" + dbMessage + "');", true);
}
// JavaScript function that displays message.
function showMessageDisplay(args, displayMessage) {
if (displayMessage != "") {
document.getElementById("spanMessage").innerHTML = displayMessage;
document.getElementById("spanMessage").style.display = 'inline';
}
}
It stops the execution but message is not displayed and Controls are not hidden too.
What should I do?
Don't do Response.End(). Just return without doing anything.
This will show the message box. Try this.
Response.Write(#"<script language='javascript'>alert('You are not allowed for this task !!!')</script>");
I have an ASP.NET Web Forms application. I want to have a button to post back to the server that will use my fields on my form (after validation) as parameters to a server process that will generate a document and stream it back to the browser. I want the form to be updated with some status results.
What is the best way to achieve this? Right now, I've got the button click generating the document and streaming it back to the browser (it's a Word document and the dialog pops up, and the Word document can be opened successfully) but the page doesn't get updated.
I have jQuery in my solution, so using js isn't an issue if that is required.
I have a very similar process on one of my servers, and the way I've handled it is to create a temporary document on the server rather than doing a live stream. It requires a bit of housekeeping code to tidy it up, but it does mean that you can return the results of the generation and then do a client-side redirect to the generated document if successful. In my case, I'm using jQuery and AJAX to do the document generation and page update, but the same principle should also apply to a pure WebForms approach.
This was way more difficult to do than I thought. The main issue is with opening a new browser window for a Word document. The window briefly flashes up, then closes - no Word document appears. It seems to be a security issue.
If i click a button on my page, I can stream the Word doc back as the response, and the browser dialog pops up allowing me to Open/Save/Cancel, but of course, my page doesn't refresh.
My final solution to this was to use a client script on the button click to temporarily set the form's target to _blank. This forces the response to the click on the postback to go to a new browser window (which automatically closes after the download dialog is dismissed):
<asp:Button Text="Generate Doc" runat="server" ID="btnGenerateDoc"
onclick="btnGenerateDoc_Click" OnClientClick="SetupPageRefresh()" />
My SetupPageRefresh function is as follows:
function SetupPageRefresh() {
// Force the button to open a new browser window.
form1.target = '_blank';
// Immediately reset the form's target back to this page, and setup a poll
// to the server to wait until the document has been generated.
setTimeout("OnTimeout();", 1);
}
Then my OnTimeout function resets the target for the form, then starts polling a web service to wait until the server process is complete. (I have a counter in my Session that I update once the process has completed.)
function OnTimeout() {
// Reset the form's target back to this page (from _blank).
form1.target = '_self';
// Poll for a change.
Poll();
}
And the Poll function simply uses jQuery's ajax function to poll my web service:
function Poll() {
var currentCount = $("#hidCount").val();
$.ajax({
url: "/WebService1.asmx/CheckCount",
data: JSON.stringify({ currentCount: currentCount }),
success: function (data) {
var changed = data.d;
if (changed) {
// Change recorded, so refresh the page.
window.location = window.location;
}
else {
// No change - check again in 1 second.
setTimeout("Poll();", 1000);
}
}
});
}
So this does a 1 second poll to my web service waiting for the Session's counter to change from the value in the hidden field on the page. This means it doesn't matter how long the server process takes to generate the Word document (and update the database, etc.) the page won't refresh until it's done.
When the web service call comes back with true, the page is refreshed with the window.location = window.location statement.
For completeness, my Web Service looks like this:
/// <summary>
/// Summary description for WebService1
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class WebService1 : WebService
{
[WebMethod(EnableSession=true)]
public bool CheckCount(int currentCount)
{
if (Session["Count"] == null)
Session["Count"] = 0;
var count = (int)Session["Count"];
var changed = count != currentCount;
return changed;
}
}
Hopefully that helps somebody else!