C# Discussion Boards - CodeProject

Re: Text Validation

MumbleB14-Apr-08 2:39

MumbleB

14-Apr-08 2:39

Christian Graus wrote:
Why would you throw an error ?

Hi Christian. Because If they don't capture the data correctly I want to error rather than let them capture incorrect data. I need to process this data into the main system at a leter stage and getting the data correct when they capture it reduces any manual fixing later.

I will give your suggestion a go and see what happenes.

Thanks for the advice again.

Re: Text Validation

Christian Graus14-Apr-08 3:02

Christian Graus

14-Apr-08 3:02

I meant I'd show the user a message, not throw an error

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: Text Validation

N a v a n e e t h13-Apr-08 23:56

N a v a n e e t h

13-Apr-08 23:56

^[abAB]{1}.*$

This expression matches with all the words starting with a and b. Use this pattern with Regex class and check for a match. If no match found, throw an error. Also you may check this[^] article which explain writing rules to your business objects and binding the error provider to the control. It can make life more easy.

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Re: Text Validation

Herman<T>.Instance14-Apr-08 2:38

Herman<T>.Instance

14-Apr-08 2:38

if (!txtboxHolderRef.Text.Lenght.Equals(11))
{
throw your error and return
}
else
{
String StartLetter = txtboxHolderRef.Text.Substring(1,1)
switch (StartLetter)
{
case "A": do something; break;
case "B": do some other thing; break;
default: break;
}
}

How to manipulated arraylist or remove() of arraylist?

vishalcodeproj13-Apr-08 23:36

vishalcodeproj

13-Apr-08 23:36

Hello,
I am coping contents of DataReader in to ArrayList and bind this ArrayList to dropdownlist1.Now i want to remove the item from my arraylist which has been selected by dropdownlist1,after deleting d item i want to bind the updated arraylist to the another dropdownlist and so on. My code looks like following....

item = new ArrayList();
conn.Open();
string qitem = " SELECT DESCRIPION FROM ITEM_MASTER ORDER BY DESCRIPION";
OracleCommand ocmd = new OracleCommand(qitem, conn);
OracleDataReader odr = ocmd.ExecuteReader();
if (odr.HasRows)
{
while (odr.Read())
{
item.Add(odr.GetString(0));
}
}
odr.Close();
conn.Close();
bind_control(ddl_mainItem, item);

Now i want to delete item selected by ddl_mainItem.What can I do?
Plz help me.....

Re: How to manipulated arraylist or remove() of arraylist?

Christian Graus13-Apr-08 23:38

Christian Graus

13-Apr-08 23:38

Why are you still using .NET 1.1, and if you're not, why are you using arraylist ?

The List class certainly has an items collection which has a remove method, I believe ArrayList does, too.

DataTable.Merge() Method

half-life13-Apr-08 23:32

half-life

13-Apr-08 23:32

Hi,

i'm Merging To DataTables Into 1
They are in same format , so far so good it's Doing it well

But When i'm trying to Update To The DataBase Nothing is Actually Done
No Saving of the Data.

This Is The Code :

<br />
//i've also Tried with only the DataTable As param//<br />
dS_M_ICD.Interface_Details.Merge(dS_E_ICD.Interface_Details, true);<br />
//In Debug it shows me that the Merger has Actually Happend in the DataSet<br />
        <br />
M_Interface_D.Update(dS_M_ICD.Interface_Details);<br />
dS_M_ICD.Interface_Details.AcceptChanges();<br />
<br />

Have Fun
Never forget it

how i apply encript and decript operations in C#

saiftanoli13-Apr-08 23:27

saiftanoli

13-Apr-08 23:27

i want to apply the encription and decription on my data files by using c#. how can i do this in c#

Re: how i apply encript and decript operations in C#

Christian Graus13-Apr-08 23:37

Christian Graus

13-Apr-08 23:37

The Cryptography namespace is full of algorithms you can use, and google abounds with examples on how to use them

Retrieving Records from Excel

Dotnetkanna13-Apr-08 23:11

Dotnetkanna

13-Apr-08 23:11

Hi,
How to retrieve records from Excel Sheet..Its working fine when i have a column name in the Excel sheet, if suppose i didnt have the column name. i have to retrive record in the basis of column index..how can i acheive this one.. im using C#.net 2003..

Regards

Kanna

Regex.Replace Enquiry [modified]

livez13-Apr-08 23:09

livez

13-Apr-08 23:09

Hello!

I´ve got this regular expression:

Regex.Replace(amount.Value.ToString(), @"(?<=^-?\d+)(?=\d{3}$)", ".")

it takes a value and returns it formated like this:

1 -> 1<br />
12 -> 12<br />
123 -> 123<br />
1234 -> 1.234<br />
12345 -> 12.345<br />
123456 -> 123.456

problem arises when number of digits are above 6, the code then returns

1234567 -> 1234.567

whereas I would want it to return

1234567 -> 1.234.567 and 12.345.678, 123.456.789 etc.
I realize the '$' character´s got go , since it means end of string, but if I remove it I get really strange results.

Could someone help me alter the expression to achive this?

modified on Monday, April 14, 2008 5:23 AM

Re: Regex.Replace Enquiry

Christian Graus13-Apr-08 23:36

Christian Graus

13-Apr-08 23:36

An easier way to do this would be to just do it using string mashing. Or using string.Format to do decimal formatting for you.

Re: Regex.Replace Enquiry

livez14-Apr-08 1:33

livez

14-Apr-08 1:33

Solved it with System.Globalization.NumberFormatInfo, thanks!

Lazy Loading

satsumatable13-Apr-08 23:09

satsumatable

13-Apr-08 23:09

Hi,

I want to load bigger size file into GUI (typically Text box),but it takes lot of time in the intial loading to avoid this like to load part of data and rest during scroll bar moving. For this i'm prefering to go for Lazy Loading.

Does anyone has solution example for lazy loading to meet his requirement? Is so give me link to walk through

Thanks

Re: Lazy Loading

Christian Graus13-Apr-08 23:35

Christian Graus

13-Apr-08 23:35

Sounds like you read a technical term while on the toilet and now you're hoping it will magically solve your problem. Lazy initialisation is not going to speed anything up, it just defers when something is loaded. IF a textbox takes a long time to load, one has to wonder why you're putting such a huge file in a textbox to start with.

MultiLanguage Support for MessageBox YesNo button

cooltoad12313-Apr-08 22:50

cooltoad123

13-Apr-08 22:50

Hallo,

I am working on application that provide multilanguage support. I am working with resource files. I have completed most of the part text, buttons, labels and messagebox text too. Now I want messagebox buttons YesNo to provide multilanguage support. In buttons, i have used buttons.text, but this is not working with messageBox buttons. I will be thankful if anyone could help in this regard.

Thanks in advance Smile | :)

Re: MultiLanguage Support for MessageBox YesNo button

N a v a n e e t h13-Apr-08 22:58

N a v a n e e t h

13-Apr-08 22:58

cooltoad123 wrote:
Now I want messagebox buttons YesNo to provide multilanguage support

AFAIK, this won't change. You need to write your own message box with required buttons.

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Re: MultiLanguage Support for MessageBox YesNo button

Christian Graus13-Apr-08 23:04

Christian Graus

13-Apr-08 23:04

Navaneeth is right, the language used comes from the locale settings for the PC.

Re: MultiLanguage Support for MessageBox YesNo button

cooltoad12313-Apr-08 23:09

cooltoad123

13-Apr-08 23:09

thanks, for early reply!

Generate CREATE TABLE script from DataTable structure [modified]

netDeveloper13-Apr-08 22:01

netDeveloper

13-Apr-08 22:01

Hi,
I have to export data from a given select in a database from one server to a table from another server.If the table where i have to insert data doesn't exist, i have to create it.Since i can't use select into which also creates the table(servers are not linked so select into won't work), i have to generate script manually and i'm using the column types from the DataTable filled using a SQlAdapter to do this.My problem is how do i map System.Type in the CREATE script.I tried using DBType, but that also returns strings like Int32, which i can't use.If let's say, i change Int32 to int will work, but doing this for every Type would mean a lot of work.
Any ideas on how to do the mapping, or is there a different approach to do this?
I could use select..into..where 1=0 on the source database to create an empty temporary table, use SMO to obtain the script and delete the temporary table, but i think it has risks so i'm trying to avoid it.
Thank you

modified on Monday, April 14, 2008 7:08 AM

read and close image from file ??

Denver Thomas13-Apr-08 21:04

Denver Thomas

13-Apr-08 21:04

hi..
How to read and close an image from a file.I used
Image img=Image.FromFile(val) code to read image from file....But once i read that one ...I wont be able to delete it or overwrite it bcz my my current project process is using that one...Also I used bmp.Save() method to write image into file.Is there anyway to overwrite a file using bmp.Save() method ?.It will be very helpful if explains with code..

modified on Monday, April 14, 2008 3:58 AM

Re: read and close image from file ??

Christian Graus13-Apr-08 21:12

Christian Graus

13-Apr-08 21:12

Please don't make your post bold. It's jut annoying.

You need to copy the image, close the original, and save from the copy. This is a bug in .NET.

Re: read and close image from file ??

N a v a n e e t h13-Apr-08 21:15

N a v a n e e t h

13-Apr-08 21:15

Denver Thomas wrote:
Image img=Image.FromFile(val)

I think Image.FromFile() won't release the file handle immediately. You may try to read the files from a stream and dispose stream after image loaded. It would be something like

Image img = null;
using (FileStream fs = new FileStream("imagePath", FileMode.Open))
{
   img = Image.FromStream(fs);
}

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Re: read and close image from file ??

Denver Thomas13-Apr-08 23:28

Denver Thomas

13-Apr-08 23:28

hi friends....
thanks for your reply.I tried both the methods..but failed.
When i tried reading from stream...it is showing out of memmory exception.
I tried another method like take a clone of the original bitmap and dispose that one...but still that process is not releasing that image. Is there any other way to do that ?

Re: read and close image from file ??

N a v a n e e t h13-Apr-08 23:49

N a v a n e e t h

13-Apr-08 23:49

Denver Thomas wrote:
it is showing out of memmory exception.

What is your image size ? Is it too big ?

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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