Text Validation - C# Discussion Boards

George_George14-Apr-08 2:06

14-Apr-08 2:06

Thanks Phannon,

Your reply is great! I think you mean this method will be maintained by designer (for example, if we add new Timer control, designer will add initialization code for Timer control in this method).

If we want any initialization code, we should put in constructor, right?

regards,
George

Re: InitializeComponent method

N a v a n e e t h14-Apr-08 0:58

N a v a n e e t h

14-Apr-08 0:58

George_George wrote:
Which party will invoke this method?

As CG said, it is auto generated. In windows application, controls will be initialized and added to the container in this method. This will be called from the constructor. In service you don't need this since you are not using any components like Timer etc. If you are using components like Timer, you can make use of this method to initialize the component and add it to the components collection which is IContainer instance. This helps the application to dispose the components used when service is getting disposed.

Hope this helps

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Re: InitializeComponent method

George_George14-Apr-08 2:15

George_George

14-Apr-08 2:15

Thanks N a v a n e e t h,

Do you think my understanding here is correct?

http://www.codeproject.com/script/Forums/View.aspx?fid=1649&msg=2506297[^]

regards,
George

Re: InitializeComponent method

N a v a n e e t h14-Apr-08 2:26

N a v a n e e t h

14-Apr-08 2:26

George_George wrote:
Do you think my understanding here is correct?

Yes.

George_George wrote:
If we want any initialization code, we should put in constructor, right?

You can put the initialization code anywhere before the instance is used.

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Re: InitializeComponent method

George_George14-Apr-08 2:43

George_George

14-Apr-08 2:43

Cool, N a v a n e e t h!

Question answered.

regards,
George

BACK TAB

M Riaz Bashir13-Apr-08 23:59

M Riaz Bashir

13-Apr-08 23:59

hi,

for send Tab key >>> SendKeys.Send("\t");

but i want to know, how may I send BACK TAB which we usually use in form's textbox like "SHIFT+TAB"

SendKeys.Send(?????)

Thank you in advance

Re: BACK TAB

dan!sh 14-Apr-08 0:13

dan!sh

14-Apr-08 0:13

I guess for shift + tab its
Sendkeys.send("+{TAB}")

For Alt + tab its
Sendkeys.send("%{TAB}")

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Text Validation

MumbleB13-Apr-08 23:44

MumbleB

13-Apr-08 23:44

Hi Guys. Hope you all had a great weekend.

I want to impliment some further validation on a textbox in one of my applications. I currently only check that the .TextLength is 11 characters and if not to throw an error message. Now, I wan to take it one step further by checking that first character is a specific character say, A or B and if not to throw an error.

i.e I want to check that the first character in A0812345678 is an A or B. If not then then throw error.

Can somebody please help with this?

Below the check to see if it is 11characters long:

if (txtboxHolderRef.TextLength < 11 || txtboxHolderRef.TextLength > 11)
{
    MessageBox.Show("HolderID should be 11 characters" , "Invalid Field Length",
        MessageBoxButtons.OK, MessageBoxIcon.Error);
    return;
}

Re: Text Validation

phannon⁸⁶13-Apr-08 23:52

phannon⁸⁶

13-Apr-08 23:52

Urm... how about myString.StartsWith("some string"); ??

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Re: Text Validation

Christian Graus13-Apr-08 23:53

Christian Graus

13-Apr-08 23:53

Why would you throw an error ?

|| (txtBoxHolderRef[0] != 'A' && txtBoxHolderRef[0] != 'B')

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

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

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.

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