Visual Basic

Restricting a multiline text box

11-Aug-08 18:40

box.Controls.Add(myNewLabelThatIJustCreated);

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

JudyV11-Aug-08 11:45

11-Aug-08 11:45

I have done some searching and can't find the answer to this one anywhere.

I have a multiline textbox on a form that shows 2 lines of text on the form. I have restricted it to 200 chars because the report page that it prints on can display 200 chars in 2 lines. My problem is users can press return as many times as they want and put as many lines of text in the box as is possible before they use the 200 chars. Since the report will recognize a CRLF character and move the text to the next line if they put more than 2 lines of text in the multiline text box only 2 of those lines of text will print no matter what. They are wanting to restrict the data entry box so that only 2 lines of text can be entered even if the character count is less that 200. Is there a way to do this?

I'm coding in VB.net with Visual Studio 2005 and using Crystal Reports XI for my report. I can't manipulate the report side of things to print more than 2 lines because the way the report is laid out there is no room.

Thanks in advance to anyone who can help.
Judy

Mycroft Holmes11-Aug-08 14:55

11-Aug-08 14:55

1. Count the number of CRs in the textbox.text and beat on the user if there is more than 1
2. Use the keydown/up events to interactively manage the characters typed into the textbox.

Never underestimate the power of human stupidity
RAH

JudyV12-Aug-08 5:26

12-Aug-08 5:26

Thanks. I was getting to that I just was wondering if perhaps there was a setting I had missed.

This points me in the right direction. Smile | :)

If the beatings worked I wouldn't need to do this. LOL

Judy

JudyV13-Aug-08 5:55

13-Aug-08 5:55

Ok, I've counted the number of returns in the box and can display a message but if I tell it to supress the keystroke in the keydown event it still enters the return in the box.

How do I stop the return from being entered?

Thanks,
Judy

JudyV13-Aug-08 7:57

13-Aug-08 7:57

Never mind. I quit displaying the message explaining that they couldn't add anymore lines and then the key supression started working. Smile | :)

Thanks for all your help,
Judy

Mycroft Holmes13-Aug-08 13:33

13-Aug-08 13:33

Try the keyup and test, keydown happens BEFORE the key is entered.

I don't think you can actually suppress the enter key from being pressed. I have always found interactive management of what the user does to be painful, I almost always let them do what they want and then clean up after, probably using the on leave event.

Never underestimate the power of human stupidity
RAH

JudyV14-Aug-08 4:09

14-Aug-08 4:09

Actually it is suppressing the keystroke on the keydown event. I created a derived class and added the count returns as a property and put the keydown event code override in the class and it works well. I also added an event for the text change to keep track of whether or not they go in and delete text and/or a return so that the count will remain accurate while they are working in the text box.

Private Sub MyTextBox_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
If (e.KeyCode = Keys.Enter Or e.KeyCode = Keys.Return) Then
If Me.CRLFCnt > 0 Then
e.SuppressKeyPress = True
Else
Me.CRLFCnt += 1
End If
End If
End Sub

As I said it took me awhile to figure it out and I had a message box popping up to tell them they had tried to put in too many lines and for some reason that caused the suppress method not to work. I tried putting the message box in the keyup event but then it just looped if you hit return on the 'OK' button. If you clicked it with the mouse it went away but we try to code things so the users don't have to take their hands from the keyboard any more than possible.

Thanks for your help it did point me in the right direction and saved me a lot of time.

Judy

Mycroft Holmes14-Aug-08 12:15

Control of external application via mouse moves and clicks

14-Aug-08 12:15

My pleasure. I see you have run into the modern developers curse, if you hold your tongue just right and face into the wind, it works. Now you can understand why I hate interacting with the textbox events.

Well done.

Never underestimate the power of human stupidity
RAH

Andy_ORS11-Aug-08 4:55

Andy_ORS

11-Aug-08 4:55

Hi,

Does anyone know of functions that may be accessed via VB code that locate the mouse in a given location, then create a mouse click event.

The idea is to control an external application by locating the mouse over a button on that application then producing the click event within that application.

I know of the "SendKey" and "SetForegroundWindow" functions, but the external application doesn't have a hot key assigned to the commands I'm trying to access.

Thanks,
Andy

VB.net string array problem

Rameez Raja11-Aug-08 1:07

Rameez Raja

11-Aug-08 1:07

How to findout the total number of elements stored in array

i created array of string and storing employee name into it from database . how i come to know that how many times employee name repeates in an array

like this

For i = start_cell_number To end_cell_number
                   Dim testarray(48) as string 
                    testarray(i) = (dr("User_Name").ToString())
                   Next

how i calculate total number of repetition of user name inside array?

any suggestion or link is highly appercited .

Regards
Rameez

sumit703411-Aug-08 1:22

sumit7034

11-Aug-08 1:22

use
testarray.Length

to find total no of elements stored in array

Manas Bhardwaj11-Aug-08 1:27

Manas Bhardwaj

11-Aug-08 1:27

rameez Raja wrote:
How to findout the total number of elements stored in array

testarray.length

rameez Raja wrote:
i created array of string and storing employee name into it from database . how i come to know that how many times employee name repeates in an array

Declare an integer variable and increment its count every time you find the desired employee with in the loop

Rose | [Rose]

Rameez Raja11-Aug-08 18:17

Rameez Raja

11-Aug-08 18:17

thanks for reply,

Actullay i have to findout total number of repetition of string inside array.

for each employee name i have to find out repitation of string name inside array .

i have tried like this

Dim icount As Integer = -1
            Do
                icount = Array.IndexOf(testarray, Label1.Text, icount + 1)
                Response.Write(icount.ToString() + "<br>")
            Loop Until icount = Array.LastIndexOf(testarray, Label1.Text)

label1.text contains name of employee am i on right track please suggest me ?

how i calculated the total number of repitation of string in array?

give me hint or link .

Regards
Rameez

Re: getting the form value

Steven St. John12-Aug-08 5:02

Steven St. John

12-Aug-08 5:02

Perhaps Array.FindAll() followed by Array.Length() would be helpful?

http://msdn.microsoft.com/en-us/library/1kkxfxdd.aspx[^]

[Message Deleted]

kjalandoon11-Aug-08 0:46

kjalandoon

11-Aug-08 0:46

[Message Deleted]

Christian Graus11-Aug-08 1:54

Re: getting the form value

11-Aug-08 1:54

jalandoonkNEWBIE wrote:
I have this web application

And yet you didn't ask in the ASP.NET forum.....

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

kjalandoon11-Aug-08 16:21

kjalandoon

11-Aug-08 16:21

yeah, sorry. if you can answer my question id appreciate it

String.format problem

Hans vd Bovenkamp10-Aug-08 23:51

Hans vd Bovenkamp

10-Aug-08 23:51

Hi, I'm trying to dynamically build an insert query.

Dim strIns as string = "Insert into XXXX (Field01, Field02) values( '{0}', {1})"
Dim strVals as string = ""Value00","value01""

Dim strWork as string = String.Format(strIns,strVals)

This results in an error
Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

Could anyone please point me into the right direction?

Thanks

Re: String.format problem

Christian Graus11-Aug-08 0:21

Re: String.format problem

11-Aug-08 0:21

{0}, {1} means you need to pass two arguments besides strIns

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

Hans vd Bovenkamp11-Aug-08 1:54

Hans vd Bovenkamp

11-Aug-08 1:54

Thanks Christian,

The arguments are supposed to be in the strVals that is being passed.
From your reply I gather that I need to pass the individual arguments rather than building a string with the values to pass.

regards,

Re: String.format problem

Christian Graus11-Aug-08 2:10

11-Aug-08 2:10

Correct.

Christian Graus

No longer a Microsoft MVP, but still happy to answer your questions.

ListView VB.NET...

ROC_Jnr10-Aug-08 21:28

ROC_Jnr

10-Aug-08 21:28

Somebody can tell me( teach me ) how can i program an editable listview?
I want to hve a listview that can be editable in any subitem.
Now i can only edit the item...

the code to edit the item is...

Private Sub ListView1_MouseDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListView1.MouseDoubleClick

    Me.ListView1.LabelEdit() = True
    Me.ListView1.SelectedItems(0).BeginEdit()


End Sub

Please i need help...
By the way my english is bad (I speak portuguese ) so forgive me if made a mistake Smile | :)

...
thanks

Just learning

Re: ListView VB.NET...

Mycroft Holmes10-Aug-08 22:04