I have a form with datagridview. I populate my datagrid with my dataset data.
Everything is going fine.
The only issue i found is.
if i lock the system and leave the form with datagridview containing data it it, and after some time (say 10 mins, when monitors goes to standby mode) if i unlock the system i see that the datagrid is empty. but a window with label has no effect its intact.
I have a VB.Net app that uses a MS Access 2003 DB along with OLEDB. My problem is that when I insert a record into a specific table, it sticks around for about 1 minute and then completely disappears. How in God's name does that happen? I'm using a DataGridView that is bound to a datasource. The Dataset that was created as a result of the Database I used from my connection string contains 4 datatables, one of which is used as the object of the code below
View 7 RepliesI have tried to test out the add delete and save function on a datagridview but the data that I added during testing would disappear after I made some changes to the code.
View 3 RepliesI am working in vb.net, visual studio 2008, with the crystal reports that comes with it. I have a push model: creating a dataset, putting data into it, making that a report source, and putting the report source onto (or into) a crystal reports viewer control (not neccessarily in that order). It works -- for the first page that's displayed.That report has two pages. If I click on the control to go to the 2nd page (where I have no data displayed yet), then on the control to come back to the first page, it displays with no data -- just the background text is there.I can see my dataset-loading code executing in the debugger, and as near as I can tell the database is no longer giving me back any data
View 1 RepliesWhen I add a new row to a datagridview, I am able to add data to a cell, but when I go to the row with the mouse the data disappears out of the cell. What code is needed to get the data to stay?
Private Sub BindingNavigatorAddNewItem_Click(sender As System.Object, e As System.EventArgs) Handles BindingNavigatorAddNewItem.Click
' When a new row is entered add Site id.
[code]....
I placed a datagrid in my form which l retrive data from my sql. i am using oledb connection. if i run the form i can retrive the data but i am not getting the data in the grid at first ,there is a "+" sign, i have to clik that then it shows the table name and after clicking the table name i can view the data displays in the grid..
View 1 RepliesPossible Duplicate: DataGridView - Validating for Cell?i have a requirement. i dont know how to get the data from the datagrid after the user entered data in textboxcolumn. i also want to validate the entered text in datagrid cell.
View 2 Repliesi want to binding excel data to a datagrid without no header, just the data.for example :my excel files consist of 3x3 matriks data in 3x3 excel cell like this
1 2 3
4 5 6
7 8 9
and i want to show all this data on data grid i have tried with some code like this
Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
Dim ds As New DataSet
MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0; " & _
[code]....
but the first row of that data ( 1 2 3 ) is not shown up in the datagrid, just the 2nd and the 3rd row that shown up in datagrid?
have made a connection to a database through VB and i was able to extract a single value from a record and display it in a datagrid table, but i don't know how to display that value in a textbox. i tried doing e.g. txtABC.text = datagrid123.item but it seems that the values cannot be converted between the datagrid and the textbox.
View 2 RepliesThe site is a buy/sell site and the page the code comes from is the "add product" page.
The problem is that the session("change") becomes nothing by some reason, i cant find any errors.The payment.aspx have a button that sends me back to the page with a session("change"). The reason i see the problem is that i when i try to edit something the category gets restetted to the first in the list. and when i debug i see that the session is nothing, though it should be something
Heres the code:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnSubmit.Click
If Not stats > 0 Then
[Code].....
I made button 4 on my form. When I run the program I find that it disappears.
I look at the visable property and I see that it is true. So what might be the problem. I also have button one that I put a message box it. When I hit the button durring run mode it will not activate. Have I missed up something here?
I fill a dropdownlist item with the following commands
View 2 RepliesI have a form that I am using to search for records in a dataset, it has a text box for entry of the search criteria and a 'Search' button to initiate the editing of the entry and .Filter on the BindingSource. This is one form in a project with many, when I show it using .ShowDialog it always disappears, (not visible and not loaded) after the 'Search' button is clicked, I have stepped through and there is no .Hide or .Close that it encounters, it performs all of the logic correctly but control is returned to the main form it was shown from. When I use the .Show method, I do not have this problem.
View 5 RepliesI'm currently coding a multi-form project that requires a NotifyIcon. The first form is the Login form which then opens a 'logging-in' form and then finally another form (they're all opened using FormName.ShowDialog() and they hide themself before opening the next form).Login Form -> Logging In Form -> Final Form.When the final form is opened, the NotifyIcon's visible property is set to true and it appears in the tasktray like normal. But when I use Me.Hide on the final form, the NotifyIcon disappears with the form.Any ideas about what is going on? The program still runs in the background despite no forms are visible (which is how it's intended to be) but without a NotifyIcon, there's no way of making the forms appear again.
View 3 RepliesI have a Windows Forms application which uses a tabpage control. On one of the tabpages (TabPage4) there is a checkbox (CompleteCheckBox), and when anybody checks that checkbox, two textboxes next to it have text put into them, and a checkbox[code]...
View 11 RepliesI'm having problems with my VS2005 .Net2.0 VB.Net Windows forms application.When I start the application and work with it for a while it somehow disappears from the taskbar.To get the Application button back on the taskbar I use Alt+Tab to switch to the application and voila,.. the taskbar button is back.In my code and form I can't seem to find anything strange.ShowInTaskbar is set to trueFormborderstule = SizableIt is an MDI application that is used for administrative purposes on sql databases.
View 4 RepliesI have a combobox on my form. It's DropDownStyle is set to DropDownList. As soon as the control has focus and the list opens up, my mouse disappears. What is causing that?
View 10 RepliesIs there any type of msgbox in vb.net that gives a message and disappears automatically after a certain time?
Or is there any method to hide the msgbox, without user's clicking OK?
Is there any type of msgbox in vb.net that gives a message and disappears automatically after a certain time? Or is there any method to hide the msgbox, without user's clicking OK?
View 2 RepliesI am working on a web browser with the url bar in a tool strip.I have noticed that whenever I resized it, the textbox stayed the same.
[code]...
This happened to be once awhile ago and I thought I had the solution, but apparently I don't. Very rare, but what happens is, I'll start a new project, build my controls on the form, go into the code window and write some code. I'll save this all out, but when I reload the project, the code window comes up OK, but the design window is just gone. The code for the form and all the controls is still there in the form.designer window, but the form itself just will not appear, and there is no icon for it over in the Solution Explorer to click on
View 1 RepliesAll of a sudden a bindingnavigator that I use has started disappeared when I run the program. It disappears in the design view too, but if I click its name down below (where all the datasets and bindingsources go) it comes back. Then once I run again it doesn't show up. I know it's still technically there because no errors in code occur, but why is it doing this?
View 2 RepliesSo i have made this program which im done with. All code has been written and it is working as it should. I do however have one bug that is pretty wierd.
Sometimes the main window just dissapears ! And i cant get it to show it self again.. Rebooting my computer does not help.. And then sometimes it just randomly shows it self again, but only between runs.
The only thing that i can come up with that could cause this, is the part of code i have that saves the position of the window to application settings and reloads them upon run. So that you can move the window around your screen (in this case dual monitors) and then close it, and the next time you start the application it shows where you closed it the last time. This must screw up somehow.
I am using a virtual keyboard I have created to write text to a textbox. Before I start typing the caret is showing the current typing position and will continue to do so if I use the physical keyboard. The problem I have is as soon as I enter a character using the virtual on-screen keyboard the caret disappears and will not come back until I use the mouse to click inside the textbox. The following is the code I use for entering an 'h'
Private Sub H_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles H.Click
If My.Computer.FileSystem.FileExists(Application.StartupPath & "Click.WAV") Then
My.Computer.Audio.Play(Application.StartupPath & "Click.WAV")
[Code].....
In the designer, the MainMenu I have created disappears as soon as I am done editing it. Before, it remained visible and worked as expected. But recently, the MainMenu not only disappears in the designer after editing, but it does not appear in the application.Adding a NEW MainMenu shows up as expected, however alot of work was put into the original MainMenu and its menu items.Is there any way to get MainMenu to act as it should?
View 13 RepliesI would like to know how to add data to datagrid in vb .net without database similar to MSFlexigrid in VB6 and access the same in the software.
View 1 RepliesI got a system which i want to insert, delete, update the data into my database and the data from database will be display using datagrid. The below is the coding for one of my button, delete.
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Try
btnSearchEmpNo.Enabled = False[code].....
Now I wanna set when user click on this button to delete a employee (for example) then the datagrid that i have in my application will not show the data of the deleted employee but in the background, the employee haven't been deleted from database.The employee only will be deleted from database when the user click on SAVE button.I know this application have to use RowState but how?
Okay I'm making a song organizer and I have a program that will load the files in a folder into a box and display the songs info into a list view. That part works fine but when you click the button to make it do anything it will get the variables that it need from the tags on the cells for each song but for some reason the one for the Album just disappears... I tried having it just show the value in a message box and it works fine. Just when I try to combine it with another variable then it wont show at all. Heres my code[code]...
View 10 RepliesMy question is on how custom controls should be updated.
I downloaded this owner drawn custom control, which I built, then copied the DLL to the Debug folder of the project and loaded it into the toolbox from there.
I decided to use this button on another project. I was mildly surprised to see the control was still in the toolbox but it seemed to work just fine. I decided to change this custom button's behavior. The button in the toolbox referenced the old version number. So I deleted it and loaded the newly rebuilt DLL.
Now come the problems. The first application--the one where the DLL was added to the toolbox from--still runs okay, but the second application is throwing errors, saying, Type 'CButtonLib.CButton' is not defined. When I add the button to a form, it appears okay. I can change its properties and it shows up in the code windows and in the object browser. But as soon as I try to run it and it throws the errors, it no longer appears in the object browser. References in the code window lose their intellisense.
Things I've tried include:
Copying the DLL to the project's debug and release folders and loading them into the toolbox from there. Removing it from the toolbox altogether and just adding a reference then copying and pasting a button directly from the first project. Copying in a form with a CButton on it from the first project. Scouring the internet for answers Swearing at the computer.
want to make the text in the textbox control disappear when clicked
View 6 Replies