I need to pass some additional information with a button press. From what I could gather reading on the web I should use a button tag.
So far I have this
Button button = new Button(this);
button.Text = "Test Button";
button.SetBackgroundColor(Android.Graphics.Color.Black);
button.SetTextColor(Android.Graphics.Color.White);
button.Tag = "hello";
button.Click += ClickEvent;
And this is the handler:
public void ClickEvent(object sender, EventArgs e)
{
Android.Widget.Button button = (Android.Widget.Button)sender;
var test = button.Tag;
}
This works, but I need to be able to pass 3 ints of data. I have tried using an array but I have no idea how to read it in the handler as it comes back as a java.object.
Can anyone please push me in the right direction?
Related
I want to give the privilage for the user to rename a file. For that When the user clicks on menu item 'rename'a pop up dialogue with and editable text box should show up with 'ok' and 'cancel' buttons? How can i implement it? Pls share the code if there are any.
Br,
Jinu
You can use the InputPrompt from the Coding4fun Tookit
The documentation is available on Codeplex: http://coding4fun.codeplex.com/wikipage?title=InputPrompt&referringTitle=Documentation
Calling it is straightforward:
var input = new InputPrompt();
input.Completed += InputCompleted;
input.Title = "Rename file";
input.Message = "Enter a new name for the file:";
input.Show();
Then you just have to retrieve the value in the callback:
private void InputCompleted(object sender, PopUpEventArgs<object, PopUpResult> e)
{
MessageBox.Show(e.Result);
}
I have a simple class inheriting RadGrid. I am adding a button to the RadGrid and a Click Event handler to that button. The button is correctly added in the required position and the click event handler is firing, but radGrid.ExportToExcel() is not doing anything. In fact, upon click and when page posts back, the button disappears. Why is this happening?
I tried to add the button control to the Page.Form control collection, but still nothing happens.
[ToolboxData("<{0}:RadGridDp runat=server></{0}:RadGridDp>")]
public class RadGridDP : RadGrid
{
public RadGridDP()
{
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
Button btnExport = new Button();
btnExport.ID = "Export";
btnExport.Text = "Export";
btnExport.Click += new EventHandler(btnExport_Click);
btnExport.CommandArgument = this.ID;
this.MasterTableView.Controls.Add(btnExport);
}
void btnExport_Click(object sender, EventArgs e)
{
Button btnExport = (Button)sender;
string RadGridId = btnExport.CommandArgument.ToString();
RadGridDP radGrid = (RadGridDP)this.Parent.Parent.FindControl(RadGridId);
radGrid.ExportSettings.IgnorePaging = true;
radGrid.ExportSettings.OpenInNewWindow = true;
radGrid.ExportSettings.ExportOnlyData = true;
radGrid.MasterTableView.ExportToExcel();
}
}
When I do same thing in a UserControl and use that UserControl on any page, it works fine. What's the difference?
I found out the solution. Whenever RadGrid Loads, it calls various events in this fashion:
1. Page OnLoad
m. RadGrid OnLoad
x. NeedDataSource
and upon click of the button (added in the manner above), events are called in this fashion
1. Page_OnLoad
m. RadGrid OnLoad
n. btnExport_Click
x. NeedDataSource
(as for strange serial numbers, these events may have other events in between, but the order of occurance is correct)
so, entire Grid is rebound with the data, and hence command to exportPdf is flushed. So nothing happens.
Interestingly, there's no need of adding one extra button, telerik provides its own buttons to do so. which can be customized as well(by implementing ITemplate). This is how am generating Reports now(though not specific to the original question):
[ToolboxData("<{0}:RadGridDP runat=server></{0}:RadGridDP>")]
public class RadGridDP : RadGrid
{
//custom logic
public RadGridDP()
{
this.ItemCreated += new GridItemEventHandler(RadGrid_ItemCreated);
this.Load += new EventHandler(RadGridDP_Load);
this.ItemCommand += new GridCommandEventHandler(RadGrid_ItemCommand);
this.PdfExporting += new OnGridPdfExportingEventHandler(RadGridDP_PdfExporting);
this.GridExporting += new OnGridExportingEventHandler(RadGridDP_GridExporting);
this.ExportSettings.ExportOnlyData = true;
this.ExportSettings.IgnorePaging = true;
// this.ExportSettings.OpenInNewWindow = true;
DoPdfFormatting();
DoExcelFormatting();
}
protected void RadGridDP_PdfExporting(object sender, GridPdfExportingArgs e)
{
e.RawHTML = e.RawHTML.Replace("border=\"1\"", "").Replace("style=\"", "style=\" border:0.5px Solid black; ")
.Replace("<thead>", String.Format("<thead>{0}", TableHeader)).Replace("</tbody>", String.Format("{0}</tbody>", TableFooter));
}
protected void RadGridDP_GridExporting(object sender, GridExportingArgs e)
{
e.ExportOutput = e.ExportOutput.Replace("<thead>", String.Format("<thead>{0}", TableHeader))
.Replace("</tbody>", String.Format("{0}</tbody>", TableFooter));
}
}
so basically i had to handle PdfExporting(for Pdf) and GridExporting(for excel)..
I had to handle Load, ItemCommand and ItemCreated as well. While the former one was required for some conditional logic, later two were required for formatting of the PDF document
I'm trying to get the parent name of a context menu item.
So I tried something like this on menuItem_click :
Button clikance = (Button)sender;
string ladyGaga = Convert.ToString(clikance.Content);
But it didn't work (invalid cast exception). thx for any help
i have use a different approach for getting the sender button of my context menu. i have made an event on the "hold_click"
where i have get back the content of the button in a public string
private void GestureListener_DoubleTap(object sender, GestureEventArgs e)
{
Button clikance = (Button)sender;
ButtonEnvoyeur = Convert.ToString(clikance.Content);
}
If you look in the debugger at the point where the exception is raised, you'll see that sender isn't a Button, so trying to do an explicit cast to Button will obviously throw an InvalidCastException.
You can use the VisualTreeHelper to walk up the tree from your actual sender to the Button element:
VisualTreeHelper.GetParent((sender as DependencyObject));
UPDATE: In your instance sender is the MenuItem in the ContextMenu. You can get to the parent ContextMenu from the MenuItem by using the VisualTreeHelper, but unfortunately, ContextMenu does not expose any public members that enable you to access the owner; the Owner property is internal. You could get the source code for the Toolkit and expose the Owner property as publi instead, or use a completely different approach.
Have you thought of using an MVVM framework (such as MVVM Light) to wire up commands to these context menu items? Your current approach is very fragile and will break as soon as you change the visual tree. If you used commands, you could pass any additional information that you need for processing via the command parameter.
Use the Tag property of the MenuItem to retrieve your Button :
// Object creation
Button myButtonWithContextMenu = new Button();
ContextMenu contextMenu = new ContextMenu();
MenuItem aMenuItem = new MenuItem
{
Header = "some action",
Tag = myButtonWithContextMenu, // tag contains the button
};
// Events handler
aMenuItem.Click += new RoutedEventHandler(itemClick);
private void itemClick(object sender, RoutedEventArgs e)
{
// Sender is the MenuItem
MenuItem menuItem = sender as MenuItem;
// Retrieve button from tag
Button myButtonWithContextMenu = menuItem.Tag as Button;
(...)
}
Alex.
Howdy,
I'm generating a bunch of Textblocks in a StackPanel. I would love to open another page when clicking on one Textbox:
sp.Children.Add(new TextBlock { Text = "Click me, I wanna open new content" });
How could I do that, it's probably something with "triggers" but I couldn't find anything on the web :-/.
Thanks!
You could use the Toolkit to add a gesture listener for the Tap event.
Alternatively you could use a HyperlinkButton as this contains a Click event.
Edit:
Example of using HyperlinkButton:
var sp = new StackPanel();
var hlb = new HyperlinkButton {Content = "click me"};
hlb.Click += hlb_Click;
sp.Children.Add(hlb);
ContentPanel.Children.Add(sp);
private void hlb_Click(object sender, RoutedEventArgs e)
{
NavigationService.Navigate(new Uri("/AnotherPage.xaml", UriKind.Relative));
}
Use TextBlock.ManipulationStarted event to detect a touch on it.
I create a button control and it shows up, but when clicked event does not fire, not sure if it could be because control gets greated after previous event in AJAX which fires fine.
Should only get executed once.
Any ideas would be appreciated, thanks.
Button btnCommentSave = new Button();
btnCommentSave.ID = "mySavebtnComments" ;
btnCommentSave.Text = "Publish";
btnCommentSave.BackColor = Color.Aquamarine;
phBlog.Controls.Add(btnCommentSave);
btnCommentSave.CommandArgument = row["ID"].ToString();
btnCommentSave.Click += new EventHandler(btnSave_Click);
protected void btnSave_Click(object sender, EventArgs e)
{
other code
}
You are not by any chance executing this code on Page_Load?
You have to make sure that this code is executed only once, otherwise the event won't fire.