To pass object from controller method to controller method use this extension methid;
public static class TempDataExtensions
{
public static void Put<T>(this ITempDataDictionary tempData, string key, T value) where T : class
{
tempData[key] = JsonConvert.SerializeObject(value);
}
public static T Get<T>(this ITempDataDictionary tempData, string key) where T : class
{
object o;
tempData.TryGetValue(key, out o);
return o == null ? null : JsonConvert.DeserializeObject<T>((string)o);
}
}
And, you can use them as follows:
Say objectA is of type ClassA. You can add this to the temp data dictionary using the above mentioned extension method like this:
TempData.Put("key", objectA);
And to retrieve it you can do this:
var value = TempData.Get<ClassA>("key") where value retrieved will be of type ClassA
On Redirect, TempData will become NULL. To solve this, try string test first;
On first controller method, set this;
TempData["error"] = "There is an error"
On a second controller method, get this;
var message = TempData["error"]
if you can see the message in second controller, no need to make any configuration changes. The problem is with your complex object serialization/deserialization
If TempData string (shown above) doesn’t work, then you need to make these configuration changes.
builder.Services.Configure<CookieTempDataProviderOptions>(options =>
{
options.Cookie.Name = "TEMPDATA";
//you have to avoid setting SameSiteMode.Strict here
options.Cookie.SameSite = SameSiteMode.Lax;
options.Cookie.IsEssential = true;
});
We can pass values as query string in RedirectToAction method but we don’t want to show sensitive data in URL. So the alternate is to pass it as TempData that is using session at the backend or simply use Session.
Here is a simple comparison;
Maintains data between
ViewData/ViewBag
TempData
HiddenFields
Session
ControllerToController
NO
YES
NO
YES
ControllerToView
YES
NO
NO
YES
ViewToController
NO
NO
YES
YES
If you like to store/retrieve complex objects between controllers using TempData, use this extension method;
Set base resolution = 30fps, video will be crisp. I am leaving it to default.
OBS file extension is mkv. We need to remux to get MP4. The reason mkv is default, a lecture of 2 hours terminates after 1 hour then we would have the video up-to the point of failure. If we set default to MP4 then risk of loosing 2 hour lecture is very high. Leaving it to default. You will be Happy doing remux as a second step.
OBS start and stop buttons are visible. We can edit it in editing software or we can use shortcuts to start and stop the video. We can add Hot keys if we want. The path is Settings -> Hot Keys. Add your favorite keys here; Press
ALT + F2 = Start/Stop
ALT + F3 = Pause/Resume
#-1. To resize video of me, click on Video Capture device, press ALT key and resize. This will crop the image.
#-2. To record a specific area of screen, Click on Display Capture, Press ALT and zoom in to screen area. This will record that screen area.
#-3. I can add a logo by dragging and dropping inside recording screen. I can make it smaller or larger.
#-4. To add a border around my face, add color source that match up with my logo. Add a color source.
#-5. To hide source from video, simply click (toggle) on the eye and my video or color source will go away.
#-6. To lock items, simply click on lock and now all of my sources are locked.
#-7. To have a cleaner interface, click on video, logo and color and make a group. Press shift, select sources and select “Group selected items”. Name them “Logo and Video”. This helps organizing my resources a little bit better.
#-8. This is trick. I am explaining and doesn’t want my face to show up. Click on Scene on the top. This will just show the desktop. When I am done with full desktop and wanted to bring back my face on the desktop, I can click on my focused scene “Proxmox performance – IPERF3”.
#-9. When I switch screen from scene to scene, it makes a hard cut. What if I want to add a transition? Click on Scene transitions and pick “Swipe”.
#-10. I don’t want OBS to shift my scene. Create following hot keys. Alt + F5.
#-11. I can add audio filters for example “Noise suppression”. This can help to suppress the noise of dog or lawn mower outside.
#-12. I can transform my resource. Click on the group and you can see transformation there.
#-13. We can re-arrange UI. To reset UI, click on View and Reset UI.
#-14. We can create profiles. Profile will store video specific scenes, for example “YouTube profile” etc.
#-15. Studio mode help us to preview without recording. The left side is live recording and right side is preview. We can make changes to the right side and when done click to swipe it to live view.
Now comes Video editing part;
There is another open source audio / video editing software, DaVinci Resolve. Here is the URL
This can be installed using admin account but wouldn’t be visible to user’s other than Admin. To make it visible to say Shahzad user account, copy admin profile to a user-defined folder e.g c:\video\blackmagic folder. Open folder and run it from there. took me some time to figure out this work around.
This one talks about cut page
pexals.com has free videos and audios that I can use in my videos.
Dafonts.com can be used to download fonts.
Here is a 2 start. This one talks about adding text.
When we apply filters in treegrid, Row property is set to true. Let’s say we have 100 records of VA and DC equally distributed 50/50. If we don’t apply any filter then Row Visible property of all records is true.
If we apply VA filter then 50 records visible property will be true and remining 50 will be false.
The twist is hidden rows. Let’s say we have 2 DC records selected. We apply VA filter then row visible property of 52 records will be selected. To get a clean picture we need to reset DC hidden rows.
For custom implementation OnAfterValueChanged Event. This is a generic event and can be used for anything (cells, rows etc).
Here is a sample code snippt;
$.each(grd.Rows, function (index, row) {
if (row.Visible == true) {
grd.SetValue(rw, 'Select', val, true);
}
}