I am trying to manipulate a requested document in the WPF WebBrowser-control. I already managed it to invoke JavaScript on loaded document, but I am not able to change the shown HTML-code in the control itself.
My (very simplified) code in the OnNavigating-Handler looks like this:
mshtml.HTMLDocument doc = (mshtml.HTMLDocument)View.browser.Document;
HTMLTableClass table = doc.getElementById("someTable") as HTMLTableClass;
if (table != null)
{
table.appendChild((IHTMLDOMNode)(doc.createElement("<tr>") as IHTMLElement));
}
doc.close();
The -element doesn't get appended to displayed document in the control.
Any hints are very appreciated!
I finally got it. Its only possible to change the content of the table by adding rows and cells which i wanted to avoid in first place. My approach was to directly change the content of the -tag, which didnt work.
mshtml.IHTMLTableRow row = table.IHTMLTable_insertRow(-1) as mshtml.IHTMLTableRow;
mshtml.IHTMLElement c = (mshtml.IHTMLElement)row.insertCell(0);
c.innerText = "some";
mshtml.IHTMLElement c1 = (mshtml.IHTMLElement)row.insertCell(1);
c1.innerText = "text";
Related
I'm interested in seeing if I can modify some XMP within an image file. I'm using the following code:
var items = MetadataExtractor.ImageMetadataReader.ReadMetadata(_filename);
foreach (var item in items)
{
if(item.Name == "XMP")
{
var y = new XmpCore.Impl.XmpMeta();
var xmp = item as MetadataExtractor.Formats.Xmp.XmpDirectory;
foreach(var xd in xmp.XmpMeta.Properties)
{
if(xd.Path == "drone-dji:AbsoluteAltitude")
{
var alt = Convert.ToDecimal(xd.Value.Substring(1,xd.Value.Length-1));
alt -= 100;
xmp.XmpMeta.SetProperty(xd.Namespace, xd.Path, alt.ToString());
}
}
xmp.SetXmpMeta(xmp.XmpMeta);
}
}
I know I'm missing something breathtakingly obvious but I don't know this library well enough to figure it out.
No exceptions come up but when I open up the file the XMP field is still the same. When I iterate thru the xmp properties after I set the property it does reflect correctly but when I end the program the file stays the same. I'm sure there's something to do with writing back to the image path but I have no idea where in this library I do that. Any help would be greatly appreciated.
MetadataExtractor doesn't support modifying files. You can update the data structure, as you show, but there's no way to write those changes back to your original file.
I'm trying to create an array with an assortment of different randomized image files in it to display on a set of buttons in Tkinter. When a given button is clicked I'd like to add the text of that file's name to a new array. Basically, when button with imageX is clicked add "imageX" to a new array.
Unfortunately, I always get a return that isn't the image's filename, or the variable that I've set to correspond to that image, but instead either:
"tkinter.PhotoImage object at X" (where is X is a location like "0x0000020FC894D2E0") if the command is populationbeta.append (population[0])
or
"pyimage#" (where # is an integer that seems to relate to the number of images in the source file), if I change the command to populationbeta.append (str(population[0]))
I feel like there should be a simple way of doing this and I've tried every work around I can think of but I'm not getting it to work. Any help would be very much appreciated! Thanks!
Here's a shortened/simplified version of the code in question:
master=tkinter.Tk()
master.title("Not working")
a1b1c1 = PhotoImage(file = r"C:/users/jdavis319/documents/bushesoflove/BoLdraw/a1b1c1.png")
a1b1c2 = PhotoImage(file = r"C:/users/jdavis319/documents/bushesoflove/BoLdraw/a1b1c2.png")
a1b1c3 = PhotoImage(file = r"C:/users/jdavis319/documents/bushesoflove/BoLdraw/a1b1c3.png")
a1b2c1 = PhotoImage(file = r"C:/users/jdavis319/documents/bushesoflove/BoLdraw/a1b2c1.png")
a1b2c2 = PhotoImage(file = r"C:/users/jdavis319/documents/bushesoflove/BoLdraw/a1b2c2.png")
population = [a1b1c1, a1b1c2, a1b1c3, a1b2c1, a1b2c2]
populationbeta = []
populationbeta.append(population[0])
print(populationbeta)
This gives the result: "[<tkinter.PhotoImage object at 0x000001A419D4F070>]"
This gives the result: "[<tkinter.PhotoImage object at 0x000001A419D4F070>]"
Correct. That shows that you have a list of PhotoImage objects. If you want the filenames you can use .cget('file') on the objects. cget is a common tkinter method for getting the value of a configured option.
filenames = [image.cget('filename') for image in population]
Or, if you don't want to use a list comprehension to create a list of filenames, you can do it on an individual image like so:
populationbeta.append(population[0].cget("file"))
I have a form with customer info that needs to be processed one transaction per page. I'm using the binding navigator to manage my pagination.
It works in all but some cases. In the cases where it doesn't work, I have to open a different window to look up information and return it to the main form. Here is the code for that:
// save current work
updateDataTable();
// Open a window and get new customer info
// CurrentCustomer is returned from the opened window
using (SqlConnection cx = new SqlConnection(GetConnectionString()))
{
DataRowView dataRow = (DataRowView)procBindingSource.Current;
dataRow.BeginEdit();
dataRow["CUSTOMER"] = CurrentCustomer;
dataRow.EndEdit();
updateDataItems();
SqlCommand cmd = new SqlCommand(
#" select acct_no from cust_processing where id = #id ", cx);
cmd.Parameters.AddWithValue("#id", (int)dataRow["ID"]);
cx.Open();
var results = cmd.ExecuteScalar();
if (results != null)
{
dataRow.BeginEdit();
dataRow["ACCT_NO"] = results.ToString();
dataRow.EndEdit();
updateDataItems(); <------ CONCURRENCY ERROR
}
}
The error I am getting is a concurrency error. I think that I have more than one version of the row possibly ? I thought I was making sure that I was on the most recent version of the row by calling updateDataTable(). I am the only user so I know I am creating the problem myself.
Here is my update method which is called when I change pages or save and exit or want to write the commit the data:
void updateDataItems()
{
this.procBindingSource.EndEdit();
this.procTableAdapter.Update(xyzDataSet);
xyzDataSet.AcceptChanges();
}
I have tried executing updateDataItems from various places such as after I assign dataRow["ACCT_NO"] = results.ToString() or before and after assigning that.
I'm pretty much down to guess and check so any thoughts, help and advice will be appreciated and +1.
Okay -- so the problem was that I was trying to update the current row from the program and also using the binding navigator. They were not working together properly.
The solution was to add a text box to the form in the forms designer and set visible = false and bind it to ACCT_NO. Once I got the results from my other form, I just needed to set the .text property of the ACCT_NO textbox to the new value and the binding navigator managed all my updates for me correctly.
txtAcct_No.text = results.ToString();
I've got a Master/Detail DataGrid and I want to filter the details.
Here's my DataGridCollectionViewSource:
<xcdg:DataGridCollectionViewSource x:Key="Features"
Filter="ExampleFilter"
Source="{Binding Path=ItemUnderEdit.Features}"
AutoCreateDetailDescriptions="False"
AutoCreateItemProperties="False">
<xcdg:DataGridCollectionViewSource.DetailDescriptions>
<xcdg:PropertyDetailDescription RelationName="Settings"
AutoCreateDetailDescriptions="False"
AutoCreateItemProperties="False">
</xcdg:PropertyDetailDescription>
</xcdg:DataGridCollectionViewSource.DetailDescriptions>
</xcdg:DataGridCollectionViewSource>
As you can see I'm filtering it with ExampleFilter, but this only filters the master. I put a breakpoint and it never sees any details.
I cant add a filter to the Detail Descriptions in the same way. Is there any way to filter the details? Any help would be much appreciated!
I went up against this problem today - I had a simple filter for both the master and detail sections that gets turned on / off via code. For the master section, it was a simple matter of code like:
((DataGridCollectionView)grid.ItemsSource).FilterCriteriaMode = FilterCriteriaMode.None; // Off
((DataGridCollectionView)grid.ItemsSource).FilterCriteriaMode = FilterCriteriaMode.And; // On
((DataGridCollectionView)grid.ItemsSource).Refresh(); // Re-run filter.
For the details section, it should have been as simple as the following code (it wasn't though):
MyDetailDescription.FilterCriteriaMode = FilterCriteriaMode.None; // Off
MyDetailDescription.FilterCriteriaMode = FilterCriteriaMode.And; // On
Turns out, doing that will enable the new filter for any new detail sections that get generated, but not existing ones. New detail sections are generated when the master row is expanded. To get around this it turned out I needed a simple foreach loop such as:
foreach (DataGridContext context in grid.GetChildContexts()) {
((DataGridCollectionViewBase)(context.Items)).FilterCriteriaMode = PetsDetailDescriptions.FilterCriteriaMode;
}
Here's my complete(ish) code for all that:
public bool ShowDeleted {
set {
if ((grid.ItemsSource != null) && (grid.ItemsSource.GetType() == DataGridCollectionView));
DataGridCollectionView v = ((DataGridCollectionView)(grid.ItemsSource));
if (value) {
v.FilterCriteriaMode = FilterCriteriaMode.None;
MyDetailDescription.FilterCriteriaMode = FilterCriteriaMode.None;
}
else {
v.FilterCriteriaMode = FilterCriteriaMode.And;
MyDetailDescription.FilterCriteriaMode = FilterCriteriaMode.And;
}
foreach (DataGridContext context in grid.GetChildContexts()) {
((DataGridCollectionViewBase)(context.Items)).FilterCriteriaMode = PetsDetailDescriptions.FilterCriteriaMode;
}
v.Refresh();
}
}
}
I'm using that in-conjunction with a simple predefined filter criterion in the XAML. IE:
<g:DataGridItemProperty Name="IsDeleted"
DataType="{x:Type sys:Boolean}">
<g:DataGridItemProperty.FilterCriterion>
<g:EqualToFilterCriterion>
<sys:Boolean>False</sys:Boolean>
</g:EqualToFilterCriterion>
</g:DataGridItemProperty.FilterCriterion>
</g:DataGridItemProperty>
I recommend using the Xaml FilterCriterions, because if you absolutely need the Filter event, it's going to get a bit more messy. For that route, you need to do the following steps:
Tap into the event when a new child DataGridContext is added to the control.
Add a predicate reference to the context.Items.Filter property (in the code state, this is a property expecting predicate, not an event).
Write your filter code in the predicate function.
I'm not 100% sure how to achieve #1 above (as I didn't need to go that route). However, a good place to possible start is the DetailsExpanding and DetailsExpanded events of the DataGridControl. For the expanding, I'm not sure if the child DataGridContext exists yet (as there is an option to cancel the expanding). So you might have to wait until after the expanded event.
I hope this helps point you in the right direction.
I am facing an issue where my graph is tree layout and looks fine initially. However, if I choose to change GraphSource upon user input/ clicks using PopulateGraphSource like in the OrgChart example, I get all the nodes stacked on top of each other with no links and all in corner.
I tried resetting graphSource by creating a new one
this.graphSource = new GraphSource();
I also tried to use the Clear method for GraphSource. Neither did solve the problem, I keep having the same issue.
I am using
ObservableCollection<Node> hierarchicalDataSource;
to fill up my GraphSource object.
All I do is create a new one and then call
PopulateGraphSource();
method.
Similar issues: question in telerik support , telerik support different question
Try calling the Layout method on the diagram control. Here is a little fragment of code
TreeLayoutSettings settings = new TreeLayoutSettings()
{
TreeLayoutType = TreeLayoutType.TreeDown,
VerticalSeparation = 60,
HorizontalSeparation=30
};
if (this.diagram.Shapes.Count > 0)
{
settings.Roots.Add(this.diagram.Shapes[0]);
this.diagram.Layout(LayoutType.Tree, settings);
this.diagram.AutoFit();
//this.diagram.Zoom = 1;
}