|
how to automatically generate unique id based on year when i add year in grid view control footer row in c#
|
|
|
|
|
That depends. What does year represent here? If you want to use a completely unique id and you can use a string for it, create a new Guid and put the year at the start. Something like this:
private string CreateUniqueId(int year)
{
Guid myGuid = Guid.NewGuid();
return string.Format("{0}-[1}", year, myGuid.ToString("D"));
}
|
|
|
|
|
sir i am use gridview control for save new records by footer row when i add year in records then automatically generate year wise unique id plz help
|
|
|
|
|
Don't.
You shouldn't generate unique ids until you actually store the information - up to that point it is subject to change because there may well be other people adding data to the same database. So use the database itself to generate your unique value.
Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)
|
|
|
|
|
|
sir i create a application on employee detail i will showing employee records date wise between two calender control from last year to till date plz help
|
|
|
|
|
I am using Google plus authentication in MVC5, at first time login it is working properly but when login next time than in function ExternalLoginCallback the function GetExternalLoginInfoAsync() return null value of loginInfo. Please help me what is the problem. code is give bellow.
public async Task<ActionResult> ExternalLoginCallback(string returnUrl)
{
var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
if (loginInfo == null)
{
return RedirectToAction("Index", "Error");
}
else
{
return RedirectToAction("Index", "Home");
}
}
|
|
|
|
|
Hi,
This has been driving me mad all week, so finally I gave in an am posting for some help. I am a budding c# programmer and have made lots of simple programs. Every time I decide to try something new, something crops up that I can't yet solve.
I am trying to make an editor for syncing srt subtitle files. I can load the subtitle file, I can send it to a textbox if i want to, i can trim and split the time line and send them to different places, but I am having difficulty processing it as a whole.
I practiced splitting and trimming the time line when i had the text string in a textbox just to make it simple. The srt file is structured like:
1
00:00:01,151 --> 00:00:03,432
Subtitle Line 1
2
00:00:05,651 --> 00:00:07,238
Subtitle Line 1 sub 2
Subtitle Line 2 sub 2
3
00:00:08,751 --> 00:00:10,065
Subtitle Line 1 sub 3
etc etc etc
I placed the "00:00:01,151 --> 00:00:03,432" line in textBox1 and using the code:
string startTime = textBox1.Text;
string result = startTime.Substring(0, theString.IndexOf("-->")).Trim();
textBox4.Text = result;
int index = textBox1.Text.IndexOf('>');
string result2 = textBox1.Text.Substring(index + 2);
textBox5.Text = result2;
This code puts each part into separate text boxes and works as i want.
I have a good handle on logic code and can understand what i need to do, but not how to do it.
-I need to read the line and if it contains only an integer, send it to column 1.
-I need to read the line and if it contains '-->' use the above code and send it to cols 2 and 3.
-I need to read the next line and send it to col 4 (1st subtitle text line, will always contain text)
-I need to read the line and if it is blank, make a new row, else append the text to the text in column 4 and then make new row. Then start over.
Logically, i know what to do, but i am having trouble with looping through and processing each line.
Does anyone have any tips that could help me? Thanks
> Load "Stumped",8,1
|
|
|
|
|
This is just a question of reading each line of the file and taking a different path based on the content of each line, as you have described above. Something like:
WHILE NOT EOF
BEGIN
READ nextline
IF nextline == singleinteger THEN COPY nextline to Column1
ELSEIF nextline.CONTAINS("-->")
BEGIN
CALL processDateFields
WHILE TRUE
BEGIN
READ nextline
IF nextline == BLANK THEN BREAK
APPEND nextline to Column4
END
ADD ROW to GRID
END
END
Obviously you will need to add some other tests for garbage data, repeated blanks etc., but this should give you a starting point.
|
|
|
|
|
Thanks, this gives me more to think about
|
|
|
|
|
I would create a class SubTitle with properties number, startTime, EndTime, etc. Then create an object SubTitle, fill the properties and add the object to a List<subtitle> collection, and so for all subtitles in the file. Finally, set the collection to be the datasource of the datagrid.
|
|
|
|
|
I hadn't thought of that, I will add it to my testing. Thanks
|
|
|
|
|
I have a label that is based on a conditional statement, however, the condition is not acting correctly, for instance knowing that the following should be true:
A==1?"First":A==2?"Second":"Final"
Given 1, you see "First"
Given 2, it shows "Final"
Given any other number it shows "Final"
I need it to show "Second"
Now you see the pseudo code, here is the actual code:
<asp:Label ID="lblActive" runat="server" Text='<%# Convert.ToInt32(Eval("Active"))==1?"Active":Convert.ToInt32(Eval("Active"))==2?"Exempt":"Inactive" %>'></asp:Label>
Why is it always showing "Inactive" when clearly the eval is 2 or 1, I expected all the 0's to be Inactive and they are, but all 1's are active and all 2's are showing "Inactive"
|
|
|
|
|
Your sample code works for me:
for (int A = 1; A < 4; A++)
{
Console.WriteLine(A == 1 ? "First" : A == 2 ? "Second" : "Final");
}Generates:
First
Second
Final So I would suspect you need to look elsewhere in your code to identify what Eval("Active") is returning, and why.
Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952)
Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)
|
|
|
|
|
The syntax is correct.
The reason is very simple. It is always showing "Inactive" because the Convert.ToInt32(Eval("Active"))may not have assigned a value. If you are reading this values from you class file. You need to check where you assign the value.
Explaining further, If you assign a value to the "Active" in or after Page_Load() event, that will not be reflected in your aspx page(unless you Rebind() the controls again). You need to consider the ASP.Net Page cycle and related events. The controls should be rendered and assigned in proper sequence.
|
|
|
|
|
Hi,
I have a imaging software where we display the images.
We have different tools called as parameters in the UI.
Few of the parameters are namely:
1. Colors
2. Image thickness
3. Change image informations and so on...
The color parameter is used to change the color of the image,
the image thickness parameter is used to change the thickness of the image,
the change image information tool is use to change the image information like name, date of scaned etc.
Requirement:
If user changes any of the parameter, we need to notify the user with a * in the UI saying
one of the parameter has changed.
Class Design:
I want to implement a observer design pattern using events existing in the parameter clases.
Question:
I read observer design pattern. I had seen it using without
events. And also the definition says that
It defines a one-to-many dependency between objects so that when one object changes state, all its dependents
are notified and updated automatically.
But in my case I have many object and in change of any object I have to notify one object. Its actually
not one to many but many to one relationship.
Can I use observer design pattern in this ?? Can you specify which class shoud have attach, detach and notify
and which class should have update ??
Any help would be highly appreciated.
Thanks.
|
|
|
|
|
The most obvious answer for me is that you should have the classes that contain these changing properties implement INotifyPropertyChanged event, and raise a PropertyChanged event when your properties change. Taking your example, suppose you had a class structure that looked a bit like this interface hierarchy:
public interface IImage
{
Color Color { get; set; }
Thickness Thickness { get; set; }
IInformation Information { get; }
}
public interface IInformation
{
DateTime Scanned { get; set; }
string Details { get; set; }
}Well, you would want to raise a property changed event for the Color, Thickness, Scanned and Details changes. Then, all you would need to do in the class that was listening to this was have a PropertyChanged subscriber for the IImage implementation and one listening to the PropertyChanged event of the IInformation. Something like this would do it:
private IImage _image = new ImageImplementation();
private SetupEventHanders()
{
_image.PropertyChanged += MyPropertyChangedEventHandler;
_image.Information.PropertyChanged += MyPropertyChangedEventHandler;
}
private void MyPropertyChangedEventHandler(object sender, PropertyChangedEventArgs e)
{
IsDirty = true;
}Okay, this is a relatively naive solution, but it should give you some ideas of where to start. If you want to go the full observable route, you'll want to look into using RX. You might get some ideas here[^].
|
|
|
|
|
I don't understand the perpose of using abstract in c#,we can't create instance of abstract class and we also not define the method so why we use this?what is special thing which we not do by normal class?plz help me
|
|
|
|
|
An abstract class must be inherited from to be usable. What this means is that it's possible to define certain functionality that is common in inherited classes, saving you from having to write it again. A common example, in WPF, is a base ViewModel class that implements INotifyPropertyChanged:
public abstract class BaseViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged(string property)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(property));
}
}
}Now, you're free to use this wherever you need:
public class MyViewModel : BaseViewModel
{
private string _name;
public string Name
{
get { return _name; }
set
{
if (_name != value)
{
_name = value;
RaisePropertyChanged("Name");
]
}
}
}
modified 11-Jun-14 15:18pm.
|
|
|
|
|
Except you forgot to make BaseViewModel an abstract class! 
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
|
|
|
|
|
|
Member 10878790 wrote: we can't create instance of abstract class
That's why.
Some base classes can be used on their own, others can't -- if a base class is unusable by itself, and you don't want anyone to instantiate it, then mark it abstract. You don't have to (unless it contains abstract members), but it shows intent.
You'll never get very far if all you do is follow instructions.
|
|
|
|
|
I am changing the timezone and want to display the zone like this 1/14/12 4:52:50 AM PST
with the code i am not able to get exactly the output that i want. How can i get time along wit PST in the end
var timeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time");
var offset = timeZoneInfo.GetUtcOffset(DateTime.Parse(newRX.Header.SentTimeOffset));
var dto = new DateTimeOffset(DateTime.Parse(newRX.Header.SentTimeOffset), offset)
|
|
|
|
|
There's no real inbuilt mechanism for writing out an abbreviated TimeZone. You might want to try this[^] library though.
|
|
|
|
|
Hi,
I would like to ask the following:
I have a client who has a PC used for front office.
At the front office, he wants to keep LCD showing his products.
Is it possible to have my .net application running on the front office PC and display the products on the LCD (let’s call it PromoLCD) without interrupting the front office work? So users will continue using the front office PC for their own applications, work, excel, etc but only my application will be shown on PromoLCD?
Is this possible?
What’s your advise?
Thanks,
Jassim
Technology News @ www.JassimRahma.com
|
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
