DataGridView - Handle ENTER-KEY And Displaying Error Message?
Apr 22, 2009
I have couple of questions with datagridview 1.How to handle the Enter-Key when the user edited the columns value.?I mean, without changing the columns values we can suppress the enter-key by following. No problem. It's working Fine.
Private Sub DataGridView1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles DataGridView1.KeyDown
If e.KeyCode = Keys.Enter Then
Dim numCols As Integer = DataGridView1.ColumnCount
Dim numRows As Integer = DataGridView1.RowCount
[code]....
But after if I select any one column & changed the values then if I press <Enter> it's moving to next row. But I want to move it to next column..
2. With Datagridview - I have a column for date. and it's defaut format is mm/dd/yyyy. But Iam looking to read the date by "dd/mm/yyyy" format. Also if the user feed wrong date format then it has to display my Error message. "INVALID DATE"
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Feb 22, 2009
how to create an error message by message box to tell the user to enter a number only if they key in a character value?
I MEAN AFTER THEY PRESS THE CALCULATE BUTTON
Private Sub btnCalcFat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalcFat.Click
Dim intFat As Integer
intFat = Integer.Parse(txtFat.Text)
lblResultDisplay.Text = txtFat.Text * 9
End Sub
My text box is call txtFat
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Jul 8, 2011
I made a simple calculator console app, and pressing ALT+ENTER gives me an error message: This system does not support fullscreen mode. Is it because I am using Windows 7 Starter?
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Sep 24, 2009
I want to create vb.net dll for exe ie displaying error in message box after installation....For example if connection file is not correct after installation then it should display in error message for that db connection is failed.....It should happened after installation....
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Mar 5, 2009
I have 5 textboxes embedded in a datagrid that require a date format (mm/dd/yy), but can be left empty if user doesn't have date. User can poplutes these textboxes for multiple records and hit submit button. On the submit i loop through the grid. If dates are populated AND they are in the correct format then I call a stored procedure that inserts the record into a table. If any of the dates that are populated in the textbox is not a date or in the incorrect format I need to display error message in a label. I got all this to work, but if it throws error message all the data in the grid is wiped out.
How can i keep data in each textbox and still display the error message?
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Mar 5, 2009
I have 5 textboxes embedded in a datagrid that require a date format (mm/dd/yy), but can be left empty if user doesn't have date.User can poplute these textboxes for multiple records and hit submit button.On the submit i loop through the grid. If dates are populated AND they are in the correct format then I call a stored procedure that inserts the record into a table.If any of the dates that are populated in the textbox is not a date or in the incorrect format I need to display error message in a label.I got all this to work, but if it throws error message all the data in the grid is wiped out.How can i keep data in each textbox and still display the error message?
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Sep 3, 2009
I am using a Thread object to perform a function. This function performs a task and displays its progress in the gridview (like adding rows changing text etc )
The reason I am using a thread for this function is that there is a cancel button on the form. While the task is in progress, user can click on cancel to abort it.
Private Sub BtnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnStart.Click m_Thread = New System.Threading.Thread(AddressOf myfunction) m_Thread.Start() End Sub
The function works fine and thread is completed. But calling any method of datagridview after thread is completed ( outside the worker thread ) generates an error- "Error creating window handle".
That's probably because i am not using the invoke method of datagridview for calling its methods or readingwriting properties Do i have to create separate delegates for all the methods properties used in the function ( worker thread)
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Mar 22, 2011
I may have missed the solution to this problem, but in my database I have 2 columns that cannot be null and a system.NoNullAllowedException message is displayed if they are mt. I want to change this message to simply indicate that the cell cannot be null, instead of the huge message with all of the information which is of no use to the user. I cannot seem to find where to change this message. When the exception is thrown I would like to see the message say something like "Empty cell not allowed".
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Jun 14, 2010
When I press enter in my loginform, my search form at the top of the website runs instead. I'm trying to handle the enter key but I keep getting a missingmemberexception. Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
[Code]....
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Jun 13, 2010
So I have a website with multiple asp controls. When I press enter inside by login form, the search function runs because it's the first thing found on the page.
How would I handle the enter button so that when the active textbox is for the login form, the loginbutton code actually runs rather than the searchbutton.
One last problem is that the login controls are inside a loginview so the hierarchy shows that the asp:textbox and asp:button for logging in are inside 3 tags like so:
<loginview>
<login>
<logintemplate>
//controls are here.
</logintemplate>
</login>
Just a note that all controls are asp and that all code is prefered in VB.
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Aug 29, 2010
how to enter a data that i enter in textbox to a datagridview... for example i enter in the textbox is round and when i click add it will go to database... im using ms access database
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Jul 19, 2010
I am using the Event Handler below for the Enter Key Press Event, it is running when ever any of the keys is pressed. This is not so much a problem when the app. is running, unnecessary yes. It is giving me problems when ever I am Debugging using Breakpoints. How can I change the Handler so it only runs when the Enter Key is Pressed, doing away with the If statement?
Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If e.KeyChar = Chr(Keys.Enter) Then
'Different code blocks will run here depending on what
'TextBox or Label is selected.
End If
End Sub
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Sep 1, 2010
I have DataGridView display Customers Details. The DataSource are from DataSet. After the user have created a new customer record and updated the SQL SERVER Table, Instread of refreshing the whole DataGridView I am trying to add new rows with data from the TEXTBOX into the DataGridView and it generated this error message: Rows cannot be programmatically added to DataGridView's row collection when the control is data-bound This is the coding which the error was generated from:
Private Sub FRefreshDataGridViewRow()
'use strmode to determine New or Edit existing record
Dim strCell1 As String = CType(Me.txtCustId.Text, String)
Dim strCell2 As String = CType(Me.txtCompName.Text, String)
[code].....
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May 26, 2011
I have an ASP.Net 3.5 in VB.Net page that uses a master-page and has several pages it uses to display content. On the master-page their is a search text-box for the site so that shows up on all the pages. Their is also a login page screen to get to a members account.The issue is: When you are on a content page I would like when a user puts something in to search for and presses enter it will process the search request.But....If you are on the login page I would like to disable enter key for the search and if the user presses enter on the login page to process the login request.
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Dec 14, 2011
I am creating a web chat application using asp.net vb. I have got the chat system to work as messages are sent and relayed back to the clients. But there was something i noticed but never thought it would be a problem. I am from England and the chat application is sitting on servers in America and noticed when the message displayed the time, the times were situated in American time zones. How would i go about setting the timezones that will correspond to there country timezones.So if the message display 17:00 American time, then the message sent to England should display 12:00 English time.
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Feb 1, 2010
I am trying to display a message box in VB.NET. This should be simple but I cannot get it to work. I have coded in VB before and used MsgBox("Message") but in VB.NET i understand its MessageBox.Show("Message") but i cannot get it to work. Its saying MessageBox is not declared but what do you declare a message box as?
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Nov 13, 2009
I have a simple message box and it's not displaying when i run my subroutine. I debugged to verify that it's going into the code and it does; however, the message box just doesn't display and I don't know why.
here's the part of the subroutine that the message box is in:
<code>
If bSuccess = True Then
[code].....
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Jul 20, 2009
I'm writing an app that sends messages over a network to another PC that processes the message and sends back a reply (e.g. a boolean or some other data). My network communication subs (based on WCF) just give me the ability to send a message to the other PC and process any received messages. The issue is that any response received is processed by my designated network message event handler sub, but I have no way of feeding it back to the sub that called for the original message to be sent.
To quickly illustrate, the situation is something like this:
Private Function NetSendMessage(ByVal message As String) As Boolean
'Send network message to PC with device connected
'....
'returns true if message sent
End Function
[Code] .....
I was thinking along the lines of maybe add a NetSendReceive function that, say, MoveRightWheel could call; NetSendReceive would call NetSendMessage, monitor the message queue for its response (perhaps via a delegate/IAsyncResult), and then return the response message (to MoveRightWheel, which would be waiting for it).
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Nov 23, 2010
How can I display a message (Using vb.net) on a computer that is attached through LAN?Can I use IP Address of that computer: How?
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Aug 5, 2009
I have an amount field which is declared as type integer in the databaseHere lies the code that i did for insertion into the database:
Dim num As Integer
If Integer.TryParse(TextBox2.Text, num) Then
cmd.Parameters.AddWithValue("@amount", num)
[code].....
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May 4, 2012
I am querying a db based on some conditions and then I am putting these data in a text file. This is done by a for Loop. Is it possible to have some message box telling that data1 is being copied, data2 is being copied, etc. Some kind of dynamic textbox, telling what is being done at the background.
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May 11, 2009
For my VB assignment I need to encrypt message and decrypt it again I managed to do it all pretty easily but the problem is the enter key. How can I turn it into ASCI and back again example
user entered - Hello
My Name is kurt
encrypted Message - Hello13My Name is kurt
Decrypted Messafe - Hello
My Name is kurt
The Space is no problem I managed to encrypted well but the enterkey is coming wrong (btw 13 because its the asci value for enter key).
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Jul 19, 2009
I'm writing an app that sends messages over a network to another PC that processes the message and sends back a reply (e.g. a boolean or some other data). My network communication subs (based on WCF) just give me the ability to send a message to the other PC and process any received messages.The issue is that any response received is processed by my designated network message event handler sub, but I have no way of feeding it back to the sub that called for the original message to be sent.
[Code]...
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Apr 11, 2011
I always useMe.Cursor = Cursors.WaitCursorfor a time taking functions like hitting the DB.Now if any exception occurs, I'll display the error message as:Msgbox(ex.Message)So before displaying any message, I need to reset the cursor to default.Is there a simple way to do it at in one place instead of writing it in all catch blocks.
Is there a way to inherit MessageBox class and override the functions?Other wise I need to code it in all the catch blocks or handle all the exceptions at one place which I don't want to modify the whole application now.
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Mar 3, 2010
I have a password form that contains a load of buttons. The user has to enter a four digit, numeric, password to procede. They do this by pressing one of 10 number buttons on the screen, the keyboard isn't used. If they enter the wrong password an error message pops up (this isn't using the error tool I just added a message box msgbox("Error Code #638492") or something) if the user doesn't enter a password, after 5 seconds (I use a timer called Timer1 with an interval of 5 seconds) the form closes and it goes back to the previous page.
My only problem is when I close the form using Me.close(), the message box is still displayed. And if the message box is still displayed it doesn't work. The form is miminized (I have the application in full screen) so this is very bad. What I need is to simulate the enter key press then close the form so the enter key is pressed, the messagebox close then the password form closes.I can do this using SendKeys.Send("{ENTER}"). Here's the sub I use:
[code]...
However, if I don't have the 'Close()' line of code in the message box closes as it should. If I don't have the message box open and I don't use the SendKeys.Send("{ENTER}") then the close() line works perfectly and close the password form as it should?
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May 24, 2011
I need to have a balloon like message box that displays for a few seconds and then fades away (not disappears at once)
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May 28, 2011
I need to have a balloon like message box that displays for a few seconds and then fades away (not disappears at once)
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Oct 25, 2010
How I can do timer to do some different things every time?
For example:
*my Intervel is: 2 mins
after 2 mins (first time):
MsgBox("1")
after 2 mins (Second time):
MsgBox("2")
after 2 mins (Third time):
MsgBox("3")
and etc....
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Aug 11, 2011
I am getting the error Parser Error Message: The server tag is not well formed. on the code line below:
<asp:HyperLink ID="imgFileType" ImageUrl="images/Icon_Pdf.gif" NavigateUrl='<%#"javascript:ViewFile('erg_", Eval("DocumentName") %>' runat="server"></asp:HyperLink>
I need the url link to be parsed as:
javascript:ViewFile('erg_Invoice_3200_QRG_Restaurant.pdf');
What am I missing in the syntax?
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Aug 7, 2011
Actually I want to display the messages shown in cmd prompt like, if i do:
Ping google.com -t
The following message will be displayed in the cmd prompt:
Reply from 74.125.235.17: bytes=32 time=133ms TTL=51
Reply from 74.125.235.17: bytes=32 time=130ms TTL=51
[code]....
I want to display the exact information into the list box of my program instantly when it is displayed in the command prompt not after whole process is completed.
As in the ping google.com -t, I want to display the each reply message instantly in the list box.
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