Not able to set image source Uri on find Object.
Stackpanel contain two children Textbox and image control.
private void TextBox_LostFocus(object sender, RoutedEventArgs e)
{
var textBox = (TextBox)sender;
textBox.Style = Application.Current.Resources["TextBoxNormal"] as Style;
textBox.FontSize = 15;
textBox.Foreground = new SolidColorBrush(Colors.Gray);
var stackpanel = textBox.Parent as StackPanel;
if (stackpanel == null)return;
var img = stackpanel.Children.Where(a => a is Image).FirstOrDefault();
if (textBox.Text != "")
{
//I was trying set Uri as mention below, but there is Nothing like "Image.Source"
//image.Source = new BitmapImage(new Uri("/Images/Others/TickRight.png", UriKind.RelativeOrAbsolute));
}
So I Would suggest Trouble shooting here.
if (textBox.Text != "")
{
BitmapImage picture = new BitmapImage(new Uri("/Images/Others/TickRight.png", UriKind.RelativeOrAbsolute));
picture.ImageFailed += (o, e) => System.Threading.SynchronizationContext.Current.Send((oo) => System.Windows.Browser.HtmlPage.Window.Alert("Image failed: " + e.ErrorException), null);
picture.ImageOpened += (o, e) => System.Threading.SynchronizationContext.Current.Send((oo) => System.Windows.Browser.HtmlPage.Window.Alert("Image opened: " + e.OriginalSource), null);
image.Source = picture;
}
//BANG.. your error should be naked!
You need cast img as Image
private void TextBox_LostFocus(object sender, RoutedEventArgs e)
{
var stackpanel = textBox.Parent as StackPanel;
if (stackpanel == null)return;
var img = stackpanel.Children.Where(a => a is Image).FirstOrDefault() as Image;
}
Related
`# Dears, this class works well to receive PDF files from another application on below Android 6, but it gives an error for Android uper 6
` #RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public int ExtractImage(Intent intent) {
try {
String filepath = null;
if (intent != null) {
String action = intent.getAction();
String type = intent.getType();
if (Intent.ACTION_VIEW.equals(action) && type.endsWith("pdf")) {
Uri file_uri = intent.getData();
if (file_uri != null) {
filepath = file_uri.getPath();
}
} else if (Intent.ACTION_SEND.equals(action) && type.endsWith("pdf")) {
Uri uri = intent.getParcelableExtra(Intent.EXTRA_STREAM);
if (uri != null) {
filepath = uri.getPath();
}
}
}
File file = new File(filepath);
PdfRenderer renderer = null;
Bitmap bm;
try {
renderer = new PdfRenderer(ParcelFileDescriptor.open(file,
ParcelFileDescriptor.MODE_READ_ONLY));
} catch (Exception e) {
}
assert renderer != null;
final int pageCount = renderer.getPageCount();
totalPage = pageCount;
for (int i = 0; i < pageCount; i++) {
PdfRenderer.Page page = renderer.openPage(i);
// Create a bitmap and canvas to draw the page into
int width = 570;
int zarib = 570 / (page.getWidth() + 1);
int height = (page.getHeight() * 2) + 1;
heightArray.add(i, height);
// Create a bitmap and canvas to draw the page into
bm = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
// Create canvas to draw into the bitmap
Canvas c = new Canvas(bm);
// Fill the bitmap with a white background
Paint whiteBgnd = new Paint();
whiteBgnd.setColor(Color.WHITE);
whiteBgnd.setStyle(Paint.Style.FILL);
c.drawRect(0, 0, width, height, whiteBgnd);
// paint the page into the canvas
page.render(bm, null, null, PdfRenderer.Page.RENDER_MODE_FOR_PRINT);
// Save the bitmap
OutputStream outStream = null;
try {
outStream = new
FileOutputStream(Environment.getExternalStorageDirectory().getAbsolutePath()
+ "/printDo2ta" + i + ".png");
} catch (Exception e) {
e.printStackTrace();
}
bm.compress(Bitmap.CompressFormat.PNG, 80, outStream);
try {
outStream.close();
} catch (Exception e) {
e.printStackTrace();
}
page.close();
}
} catch (Exception e) {
runOnUiThread(() -> Toast.makeText(getBaseContext(),
"خطا در پردازش فایل: " + e.getMessage(),
Toast.LENGTH_SHORT).show());
}
return totalPage;
}
I inserted this code in AndroidManifest.xml
`<provider
android:name="androidx.core.content.FileProvider"
android:authorities="ir.myproject.test.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>`
`
And I made the class provider_paths.xml
`<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="external_files" path="."/>
</paths>`
I don't know what else I need to change to make it work on Android 8
please help me`
I want a frame with a dashed border (as shown in the image). I am looking for UWP Renderer if anyone has any suggestions on that please share them with me. I am stuck with this.
Custom Renderer for Dashed Border of frame in UWP Xamarin
Current there is not such Dashed Border of frame in UWP Xamarin, but you can make it with Rectangle and set available StrokeDashArray to implement it and then use ViewRenderer to render it within Xamarin. We will share DashedBorderRenderer below, for the complete control please refer code sample here.
public class DashedBorderRenderer : ViewRenderer<DashedBorder, DottedBorder>
{
DottedBorder _dottedBorder;
FrameworkElement _navtiveContent;
double defaultPadding = 2;
bool isOpened;
public DashedBorderRenderer()
{
}
protected override void OnElementChanged(ElementChangedEventArgs<DashedBorder> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
_navtiveContent.Loaded -= Native_Loaded;
_navtiveContent.SizeChanged -= Native_SizeChanged;
}
if (e.NewElement != null)
{
if (Control != null)
{
var stroke = Element.DashedStroke == 0 ? Element.DashedStroke : 2.0;
var borderColor = Element.BorderColor.ToWindowsColor() == null ? Element.BorderColor.ToWindowsColor() : Colors.Red;
Control.DashedStroke = new Windows.UI.Xaml.Media.DoubleCollection() { stroke };
Control.StrokeBrush = new Windows.UI.Xaml.Media.SolidColorBrush(borderColor);
}
else
{
_dottedBorder = new DottedBorder();
_navtiveContent = Element.Content.GetOrCreateRenderer().GetNativeElement() as FrameworkElement;
_navtiveContent.Loaded += Native_Loaded;
_navtiveContent.SizeChanged += Native_SizeChanged;
var stroke = Element.DashedStroke == 0 ? 2.0 : Element.DashedStroke;
var borderColor = Element.BorderColor.ToWindowsColor() == null ? Element.BorderColor.ToWindowsColor() : Colors.Red;
_dottedBorder.DashedStroke = new Windows.UI.Xaml.Media.DoubleCollection() { stroke };
_dottedBorder.StrokeBrush = new Windows.UI.Xaml.Media.SolidColorBrush(borderColor);
SetNativeControl(_dottedBorder);
}
}
}
private void Native_SizeChanged(object sender, SizeChangedEventArgs e)
{
UpdateSize(sender);
}
private void Native_Loaded(object sender, RoutedEventArgs e)
{
UpdateSize(sender);
}
private void UpdateSize(object sender)
{
var content = sender as FrameworkElement;
if (content is Windows.UI.Xaml.Controls.Image)
{
if (!isOpened)
{
(content as Windows.UI.Xaml.Controls.Image).ImageOpened += (s, e) =>
{
isOpened = true;
var image = sender as Windows.UI.Xaml.Controls.Image;
_dottedBorder.Height = image.ActualHeight + defaultPadding;
_dottedBorder.Width = image.ActualWidth + defaultPadding;
};
}
else
{
_dottedBorder.Height = content.ActualHeight + defaultPadding;
_dottedBorder.Width = content.ActualWidth + defaultPadding;
}
}
_dottedBorder.Height = content.ActualHeight+defaultPadding;
_dottedBorder.Width = content.ActualWidth + defaultPadding;
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
}
}
I'm using below code to generate pdf of a page having listview. And it all works good till I have a very small list once I got list with more than 50 items it crashing with memory exception. I think variable pdf is taking all memory. I have checked using profiling it goes above 180 and pdf variable was on top when I took snapshot at profile.
async PDFTest_Loaded(int a)
{
try
{
pdf = new C1PdfDocument(PaperKind.Letter);
pdf.Compression = CompressionLevel.NoCompression;
WriteableBitmap writeableBmp = await initializeImage();
List<WriteableBitmap> ListBitmaps = new List<WriteableBitmap>();
pdfPage PageBitmaps = new pdfPage();
FrameworkElement header = RTABlock as FrameworkElement;
header.Arrange(pdf.PageRectangle);
var headerImage = await CreateBitmap(header);
FrameworkElement Pageheader = SalikPaymentReceipt as FrameworkElement;
Pageheader.Arrange(pdf.PageRectangle);
var PageHeaderImage = await CreateBitmap(Pageheader);
double pdfImageWidth = 0;
foreach (var item in EpayPreviewListView.Items)
{
List<WriteableBitmap> temp = new List<WriteableBitmap>();
var obj = EpayPreviewListView.ContainerFromItem(item);
List<FrameworkElement> controls = Children(obj);
StackPanel ListItemStackPanel = controls.Where(x => x is StackPanel && x.Name == "ListItemStackPanel").First() as StackPanel;
if (ListItemStackPanel is StackPanel)
{
StackPanel itemui = ListItemStackPanel as StackPanel;
if (!(pdfImageWidth > 0))
{
pdfImageWidth = itemui.ActualWidth;
}
itemui.Arrange(new Rect(0, 0, pdfImageWidth, pdf.PageRectangle.Height));
temp.Add(await CreateBitmap(itemui));
PageBitmaps = new pdfPage() { bitmap = temp };
CreateDocumentText(pdf, headerImage, writeableBmp, PageHeaderImage, PageBitmaps);
PageBitmaps = null;
temp = new List<WriteableBitmap>();
}
}
StorageFile Assets = await Windows.Storage.ApplicationData.Current.LocalFolder.CreateFileAsync("Salik Payment Receipts.pdf", CreationCollisionOption.GenerateUniqueName);
PdfUtils.Save(pdf, Assets);
EpayPreviewListView.InvalidateArrange();
EpayPreviewListView.UpdateLayout();
LoadingProgress.Visibility = Visibility.Collapsed;
PrintButton.IsEnabled = true;
}
catch (Exception ex)
{
Debugger.Break();
}
}
public List<FrameworkElement> Children(DependencyObject parent)
{
try
{
var list = new List<FrameworkElement>();
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
if (child is StackPanel || child is TextBlock || child is ListView)
list.Add(child as FrameworkElement);
list.AddRange(Children(child));
}
return list;
}
catch (Exception e)
{
Debug.WriteLine(e.ToString() + "\n\n" + e.StackTrace);
Debugger.Break();
return null;
}
}
async public Task<WriteableBitmap> CreateBitmap(FrameworkElement element)
{
// render element to image (WinRT)
try
{
var renderTargetBitmap = new RenderTargetBitmap();
await renderTargetBitmap.RenderAsync(element);
var wb = new WriteableBitmap(renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight);
(await renderTargetBitmap.GetPixelsAsync()).CopyTo(wb.PixelBuffer);
//var rect = new Rect(0, 0, renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight);
if (!App.IsEnglishSelected)
{
wb = wb.Flip(WriteableBitmapExtensions.FlipMode.Vertical);
}
return wb;
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString() + "\n\n" + ex.StackTrace);
Debugger.Break();
return new WriteableBitmap(0, 0);
}
}
bool isFirst = true;
void CreateDocumentText(C1PdfDocument pdf, WriteableBitmap headerImage, WriteableBitmap writeableBmp, WriteableBitmap pageHeading, pdfPage ListItem)
{
try
{
if (!isFirst)
{
pdf.NewPage();
}
isFirst = false;
pdf.Landscape = false;
double contentHeight = 0;
double leftMargin = 0;
string fontName = "Arial";
// measure and show some text
var text = App.GetResource("RoadandTransportAuthority");
var font = new Font(fontName, 36, PdfFontStyle.Bold);
// create StringFormat used to set text alignment and line spacing
var fmt = new StringFormat();
fmt.Alignment = HorizontalAlignment.Center;
var rc = new Rect(0, 0,
pdf.PageRectangle.Width, headerImage.PixelHeight);
pdf.DrawImage(headerImage, rc, ContentAlignment.MiddleCenter, Stretch.None);
contentHeight += headerImage.PixelHeight + 2;
rc = new Rect(0, contentHeight, pdf.PageRectangle.Width, writeableBmp.PixelHeight);
pdf.DrawImage(writeableBmp, rc);
contentHeight += writeableBmp.PixelHeight + 5;
rc = new Rect(leftMargin, contentHeight,
pdf.PageRectangle.Width,
pageHeading.PixelHeight);
pdf.DrawImage(pageHeading, rc, ContentAlignment.MiddleCenter, Stretch.None);
contentHeight += pageHeading.PixelHeight + 2;
Debug.WriteLine(ListItem.bitmap.Count.ToString());
for (int i = 0; i < ListItem.bitmap.Count; i++)
{
rc = PdfUtils.Offset(rc, 0, rc.Height + 10);
rc.Height = ListItem.bitmap.ElementAt(i).PixelHeight;
pdf.DrawImage(ListItem.bitmap.ElementAt(i), rc, ContentAlignment.TopCenter, Stretch.None);
ListItem.bitmap[i] = null;
}
ListItem = null;
}
catch (Exception e)
{
//...
}
}
It is due to memory clash I have to decrease the quality of images to handle it. Also it takes some time to release memory.
Paging is not working when I click on pages. Nothing displays. Here is the code,
Markup on my ascx form,
<div class="mGrid">
<SharePoint:SPGridView
runat="server"
ID="gdSharedReport"
AutoGenerateColumns="false"
CssClass="mGrid"
AllowPaging="true"
PagerStyle-CssClass="pgr"
AlternatingRowStyle-CssClass="alt"
EmptyDataText="No Survey found."
OnSorting="gdSharedReport_Sorting"
OnPageIndexChanging="gdSharedReport_PageIndexChanging"
/>
</div>
Code on my ascx.cs,
public DataView dv;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
GenerateGrid();
}
}
private DataTable BindData()
{
DataTable table;
table = new DataTable();
table.Columns.Add("SurveySet", typeof(string));
table.Columns.Add("SurveySection", typeof(string));
table.Columns.Add("SurveyQuestion", typeof(string));
table.Columns.Add("Employee", typeof(string));
table.Columns.Add("Supervisor", typeof(string));
table.Columns.Add("EmployeeNumber", typeof(string));
table.Columns.Add("SurveyDate", typeof(string));
DataRow row;
try
{
SPListItemCollection collListItems = list.GetItems(oQuery);
row = table.NewRow();
//Logic here to set rows
table.Rows.Add(row);
}
catch(Exception ex){}
return table;
}
private void GenerateGrid()
{
DataTable dt = BindData();
dv = new DataView(dt);
gdSharedReport.DataSource = dv;
gdSharedReport.AutoGenerateColumns = false;
gdSharedReport.AllowSorting = true;
gdSharedReport.Sorting += new GridViewSortEventHandler(gdSharedReport_Sorting);
//Setting bound fields here
gdSharedReport.PageSize = 10;
gdSharedReport.AllowPaging = true;
gdSharedReport.PageIndexChanging +=
new GridViewPageEventHandler(gdSharedReport_PageIndexChanging);
gdSharedReport.PagerTemplate = null;
if (ViewState["SortDirection"] != null && ViewState["SortExpression"] != null)
{
dv.Sort = ViewState["SortExpression"].ToString()
+ " " + ViewState["SortDirection"].ToString();
}
gdSharedReport.DataBind();
}
public void gdSharedReport_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gdSharedReport.PageIndex = e.NewPageIndex;
gdSharedReport.DataBind();
}
public void gdSharedReport_Sorting(object sender, GridViewSortEventArgs e)
{
string lastExpression = "";
if (ViewState["SortExpression"] != null)
lastExpression = ViewState["SortExpression"].ToString();
string lastDirection = "asc";
if (ViewState["SortDirection"] != null)
lastDirection = ViewState["SortDirection"].ToString();
string newDirection = "asc";
if (e.SortExpression == lastExpression)
newDirection = (lastDirection == "asc") ? "desc" : "asc";
ViewState["SortExpression"] = e.SortExpression;
ViewState["SortDirection"] = newDirection;
dv.Sort = e.SortExpression + " " + newDirection;
gdSharedReport.DataBind();
}
Here is how grid loads,
Here is what comes when I click to pages,
If I modify following function ,
public void gdSharedReport_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gdSharedReport.PageIndex = e.NewPageIndex;
gdSharedReport.DataBind();
}
To,
public void gdSharedReport_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gdSharedReport.PageIndex = e.NewPageIndex;
gdSharedReport.DataSource = BindData();
gdSharedReport.DataBind();
}
Then pagination start working but paging number disappears if I click on paging ,
You need to again specify pagination in page index change event.
public void gdSharedReport_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gdSharedReport.PageIndex = e.NewPageIndex;
gdSharedReport.AllowPaging = true;
gdSharedReport.PageIndexChanging += new GridViewPageEventHandler(gdSharedReport_PageIndexChanging);
gdSharedReport.PagerTemplate = null;
gdSharedReport.DataSource = BindData();
gdSharedReport.DataBind();
}
I have a datagrid and its rows are colored based on certain condtions..There is a vertical scrollbar for my datagrid.. If the user scrolls the datagrid the index of the colored rows r getting changed.. For eg: if 2 row is colored if the user scrolls down and comes up the index of the colored row is getting messed up...
here is the code....
dggeneralconfiguration.LoadingRow += new EventHandler<DataGridRowEventArgs>(grid1_LoadingRow);
dggeneralconfiguration.UnloadingRow += new EventHandler<DataGridRowEventArgs>(grid1_UnloadingRow);
void grid1_LoadingRow(object sender, DataGridRowEventArgs e)
{
ShowGeneralGrid c = e.Row.DataContext as ShowGeneralGrid;
if (c.Status == false)
{
if (e.Row != null)
{
e.Row.Background = new SolidColorBrush(Colors.Red);
//e.Row.Background = new SolidColorBrush(Colors.Transparent);
}
}
}
void grid1_UnloadingRow(object sender, DataGridRowEventArgs e)
{
ShowGeneralGrid c = e.Row.DataContext as ShowGeneralGrid;
if (c.Status == false)
{
if (e.Row != null)
{
e.Row.Background = new SolidColorBrush(Colors.Red);
//e.Row.Background = new SolidColorBrush(Colors.Transparent);
}
}
}
Better late than never. ;-) . I too had similar kind of problem.. try assigning row background to null on unloading row event.
private void dg_UnloadingRow(object sender, DataGridRowEventArgs e)
{
e.Row.Background = null;
}