DataGridViewComboBoxColumn Values - C# Discussion Boards

First Prev Next

Re: Making a .DLL out of C# project and using it in VC++

lechium12120-Jun-07 14:14

lechium121

20-Jun-07 14:14

Thanks!

This sounds much more straightforward operation that I expected. I shall try it, and report back with result later on.

wbr,
Victor

SQL Server 2005 and C#.Net

Software_Specialist20-Jun-07 9:33

Software_Specialist

20-Jun-07 9:33

Hiya,
I am looking for some example application which uses SQL Server 2005 for its database. I want to learn how can i connect database with C#.Net application.
Note:= i dont want to use ASP.Net.
I want to write a software with database(sql server 2005)
My google friend is not helping me much in this..Can any body give me any good reference or any article from where i could learn more about it...
Thanks
SS

Re: SQL Server 2005 and C#.Net

Not Active20-Jun-07 9:42

Not Active

20-Jun-07 9:42

There is no difference between using SQL Server 2000 or 2005 in a C# application. Certainly your research has turned up at least one reference to using databases and c#

only two letters away from being an asset

Re: SQL Server 2005 and C#.Net

Christian Graus20-Jun-07 12:47

Christian Graus

20-Jun-07 12:47

Software_Specialist wrote:
Note:= i dont want to use ASP.Net.

By and large, how you connect in ASP.NET and in winforms is the same, they use the same classes. The database doesn't care about the UI layer.

Software_Specialist wrote:
My google friend is not helping me much in this

I don't see how that is possible.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Take Picture using Digital Camera in C#

salman_syed_0120-Jun-07 9:32

salman_syed_01

20-Jun-07 9:32

I want to take picture using my digital camera usig C# application, suppose when i click on a button on a window form using c#, it should caoture picture which later on i could save.Please someone has any idea plz send me with source code o f VB.NET or Visual C#.
thanks.

Re: Take Picture using Digital Camera in C#

led mike20-Jun-07 10:01

led mike

20-Jun-07 10:01

salman_syed_01 wrote:
I want to take picture using my digital camera usig C# application

So your camera provides an interface for doing this? Please provide a link to the documentation.

Re: Take Picture using Digital Camera in C#

Christian Graus20-Jun-07 12:05

Christian Graus

20-Jun-07 12:05

If it's a Canon camera, check out my wrapper article for the Canon SDK. If it's not, you can take a picture with most cameras with WMI, but not with the sort of control that Canon offers. Other manufacturers have had SDKs in the past, but none do now, that I know of.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

DataGridViewComboBoxColumn Values

~~~Johnny~~~20-Jun-07 9:07

~~~Johnny~~~

20-Jun-07 9:07

In a DataGridViewComboColumn I can set a datasource for multiple choices for entring data and the drop down choices show me the display values to select from. The problem is the DataGridView cells, once not in edit mode, show me the actual database data instead of the DisplayMember's value. Is there a simple way to make the column show display values intead of the actual data ?

Confused | :confused:

Re: DataGridViewComboBoxColumn Values

~~~Johnny~~~20-Jun-07 12:38

~~~Johnny~~~

20-Jun-07 12:38

Don't answer to such a dum question!
I wasn't paying attention and data types were not matching

Poke tongue | ;-P

Sorry for wasting time

table like excel

daniel9920-Jun-07 6:53

daniel99

20-Jun-07 6:53

I need some help. I´m looking for a table with labeled rows and clomuns (like excel).

Re: table like excel

joe carbone20-Jun-07 7:46

joe carbone

20-Jun-07 7:46

hi
this is a good example

http://www.codeproject.com/cs/miscctrl/csharpgridcontrol.asp

regards

Help with random numbers

amatbrewer20-Jun-07 6:16

amatbrewer

20-Jun-07 6:16

When I run the following code I get the same number 36 times, but when I step through it in debug I get 'random' numbers?!?!
Any idea why?

for (int a = 0; a < 36; a++)<br />
            {<br />
                Random generator = new Random();<br />
                int randomValue;<br />
                randomValue = generator.Next(1, 20);<br />
                list3.Add(a, randomValue);<br />
            }

David Wilkes

Re: Help with random numbers

led mike20-Jun-07 6:25

led mike

20-Jun-07 6:25

what is "list3" ?

Re: Help with random numbers

amatbrewer20-Jun-07 6:28

amatbrewer

20-Jun-07 6:28

Sorry, "list3" is a custom data type similar to a listbox.

David Wilkes

Re: Help with random numbers

Luc Pattyn20-Jun-07 6:34

Luc Pattyn

20-Jun-07 6:34

Hi,

you create a new random generator every time; they each start with a dfeault
seed value, which depends on the current time. As a result, while single stepping
it seems all right; when running it finishes in less than 1 second, so all
seeds are the same.

You should create and use only one generator outside the loop and keep using it.

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

Re: Help with random numbers

led mike20-Jun-07 6:37

led mike

20-Jun-07 6:37

Luc Pattyn wrote:
you create a new random generator every time;

I totally missed that!

Re: Help with random numbers

amatbrewer20-Jun-07 6:38

amatbrewer

20-Jun-07 6:38

That makes total sense.
Figured it was something simple.

Thanks!!!

David Wilkes

Re: Help with random numbers

Thomas Stockwell20-Jun-07 12:56

Thomas Stockwell

20-Jun-07 12:56

Random generator = new Random();
for (int a = 0; a < 36; a++)
{
int randomValue;
randomValue = generator.Next(1, 20);
list3.Add(a, randomValue);
}

Regards,
Thomas Stockwell

Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

Visit my homepage Oracle Studios[^]

Default value selected in Combo Box after another form closes.

bhoomi kakaiya20-Jun-07 5:45

bhoomi kakaiya

20-Jun-07 5:45

Hello all,

I am having 5 combo Boxes in my Form1.cs whose values are not selected.
I have set SelectedIndex = -1.

After this i am opening another form. Doing some operation and closing it.
When the Control returns to Form1.cs all the combo Boxs are having 1st value selected.
I have checked none of the events are getting fired. But by default all the combo boxes are set to SelectedIndex = 0.

Any help regarding this behaviour of ComboBox Values being selected on another form closing would be highly appreciated.

Thanks in Advance.

--Bhoomi

Re: Default value selected in Combo Box after another form closes.

~~~Johnny~~~20-Jun-07 12:37

~~~Johnny~~~

20-Jun-07 12:37

I am not sure but I think you will have to reset the SelectedIndex agin when the form becomes active. I think it has to do with how forms work ie STA threading model.

Re: Default value selected in Combo Box after another form closes.

atulonweb@hotmail.com20-Jun-07 21:27

atulonweb@hotmail.com

20-Jun-07 21:27

Hi bhoomi

I think you want to select values of combos on first form on the closing of second form....
is it???

Atul

Re: Default value selected in Combo Box after another form closes.

bhoomi kakaiya21-Jun-07 4:27

bhoomi kakaiya

21-Jun-07 4:27

What is the behaviour of STA Threading Model. Does it fill up 1st values of the attached Datasource on Activate?

Then it is a dangerours thing.

If any user has set out ComboBox to be blank and opens another form then those Blanks goes away. How is the user supposed to know which all values might have changed.

Is there any solution for this??

Any help would be highly appreciated.

Regards,
Bhoomi.

Re: Default value selected in Combo Box after another form closes.

atulonweb@hotmail.com20-Jun-07 21:31

atulonweb@hotmail.com

20-Jun-07 21:31

Hi Bhoomi

I think u want to change the index of combos of first form on closing of second form. If this is question then events and delegates are used int this scenario....

Atul Kumar

Re: Default value selected in Combo Box after another form closes.

bhoomi kakaiya21-Jun-07 4:24

bhoomi kakaiya

21-Jun-07 4:24

For knowing the exact problem, i have created another application as follows :

1. MDI Form with 2 menus : Form1.cs and Form2.cs

2. Form1.cs
2 Comboboxes filled through DataTable.

3. Form2.cs
Just a TextBox.

Behaviour is like this :
Open Form1.cs in MdiParent. ComboBoxes gets filled up. Remove the selected value manually. Open Form2. Close the Form2. Both the comboBoxes are filled up with 1st values.

I am unable to undertstand why the combo boxes are filled up with initial values on its own.

Any help would be highly appreciated.

Regards,
Bhoomi.

Re: Default value selected in Combo Box after another form closes.

~~~Johnny~~~21-Jun-07 6:20

~~~Johnny~~~

21-Jun-07 6:20

Not sure why exactely but this is not the only strange behavior I see.

I now that forms run on the STA threading model so a form that doesn't have the control is actually not "running". I think that when a form regains the control, it reinitilizes partly its controls, so behaviors like this are to be expected. I learned with time to be very carefull about this. There must be reading to do on this but I never took the time to do it. try to at least understand the difference between STA and MTA, it will answer many of your questions on forms.

Good luck Wink | ;)

Last Visit: 31-Dec-99 18:00 Last Update: 10-May-24 8:35

Refresh

ᐊ Prev 1...9113 9114 9115 911691179118 9119 9120 9121 9122 Next ᐅ

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.