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robinnexus wrote: What I don't get is, what situations you would use them in
You use them every time you use events.
robinnexus wrote: what advantages do the bring
You can pass around references to a method on an object rather than the object itself. They can be multicast, allowing you to call more than one method with a single call.
robinnexus wrote: Why would it be better to pass a delegate from classA to ClassB rather than just instantiating ClassA from ClassB and using ClassA's methods that way
What if you already have an instance of ClassA and so instantiating a new instance in ClassB would give the wrong behaviour? Forms are a good example. Say FormA is already open and you want to call a method on FormB.... you cant just instantiate another FormA as this would be a different instance to the one currently open that you want to call a method on.
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Hi J4amieC,
Thank you so much for you reply.
Cheers!
Ranjit
.NET crazy
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http://www.ondotnet.com/pub/a/dotnet/2003/06/23/progCsharp3.html
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Hi all,
what is he equivalent of a c struct in c#?
Thank you
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Surprisingly, it is [url=http://msdn2.microsoft.com/en-us/library/saxz13w4(VS.80).aspx]Struct[/url]
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hi all
i have some values on html page in javascript. i want to get that values in C#. how to do that.
I tried displaying it on a label, and retreave it from there.
This is the function in javascript
function display()<br />
{<br />
var localpath1 = document.getElementById('lblerr');<br />
lblerr.innerText = localpath;<br />
}it is diplaying the value on label. lblerr is the id of label. am calling this function on pageload
but when i try to get the value using lblerr.text, it is showing null.
y is it so?
how to get value on the label
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innerText is a different property its not same as .Text.
Make a hidden variable in a form with runat="server" and assign it that value.
In .aspx
In javascript u can write
document.getElementById('hdnVar').value = localpath;
and in c#
lblerr.Text = hdVar.value.ToString();
Try it, It should work.
Prateek...
Prateek..
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i had tried this one also previously.
error was occuring
the error is
System.NullReferenceException:Object reference not set to an instance of an object
what is this?
how to rectify this.
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P_Elza wrote: m calling this function on pageload
but when i try to get the value using lblerr.text, it is showing null.
Try using this:
if (this.IsPostback)
{
string value = Request["lblerr"];
}
Hope it helps.
PS:
Don't open new topics....continue on the one already opened and try explain more detailed.
Another hint: This is the C# forum...there is an ASP.NET forum also.
There are 10 kinds of people: those who understand binary and those who don't
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Hi All,
How can a design a line control using C#. I want to make a line control like microsoft visio . means , after drwing the control i can change the postion , angle etc.
Any idea to start.
Thanks in advance 
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Abhijit Jana wrote: How can a design a line control using C#
Probably by doing alot of graphics coding. Sorry I wasn't very specific, but your question is out of the scope of a post.
"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus
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thanks for reply
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Hi,
I need to enable active scripting option of internet explorer dynamically.
if anyone knows plz give the solution..
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i made a profile page in my application and now i want that user can load his picture with all other information
please help me out how do i store / load picture in database along with all other information of the user
waiting for replies as soon as possible
regards 2 all
kanza
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Why oh why don't you search Google or CodeProject? A simple search and I found this [^] article on CP. You can also try this [^]. Search the web...try...and if you have problems post here.
There are 10 kinds of people: those who understand binary and those who don't
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if you want to upolad picture then do it and same the image path on database.
and in user profile while retriving the information , give the image path on the Picture box.
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which control should i need to store picture ???
thanks 4 ur last reply bt being a beigner i dont fully understand
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you do not need any control to store in image.
when user select a picture to upload , then it will stored in a local drive
e.g:
ur application run on com1, com2, com3 and there is a server
now com1 user upolad his image , then the image will save in server
e,g: server\com1user\photo
now store that path in database with all other information . now while retraving , just retrive the path as string and give image1 url= stringpath
Now i think it is clear to you.
Good luck
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Hi All,
(Visual C#, System.Drawing, GDI+)
I have developed a drawing area where i have drawn "Sample Text" in rectangle. The properties (Color and Font of text) are displayed in PropertyGrid.
Problem: if i change the color of text (in PropertyGrid), color of text is NOT changed immediately. It is changed only if i click on the text.
Any solution??
-- modified at 3:03 Wednesday 31st October, 2007
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Hi,
How do I send a Textbox value to a SQL View?
Example: I have a Textbox and I want to do a SQL View based upon the value of the Textbox.
Can anyone please help?
Kind Regards
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just pass the value with sqlcommand
cmd=create view + "'textbox1.text'" + as select.....
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Abhijit Jana wrote: create view + "'textbox1.text'" + as select.....
Not a good method, it is very near to SQL Injection Attacks[^].
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Llama_4 wrote: I want to do a SQL View based upon the value of the Textbox.
Creating the view ? Parameterized views are not allowed in SQL Server 2000
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I don't know why GE' designed it's API this way: you can get features like placemarks, but they don't have the Lon/Lat info at all! Yes, you can make GE "fly" there and then you can get the Lon/Lat via the camera, but the prerequisit is the feature's HasView==1. In practice I found most features don't have view.
How can I get the Lat/Lon of a feature?
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sduhd wrote:
How can I get the Lat/Lon of a feature?
Not sure, have you looked through all of their documentation?
"Any sort of work in VB6 is bound to provide several WTF moments." - Christian Graus
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