I have an update statement under RowLeave event of my datagridview. Before I update it I need to validate the cell if there is an empty value. But whenever I moved the focus to another row, RowLeave is called first before CellLeave/CellValidating.Is there another way of validating the cell when leaving a row?
Note: Leaving a cell in the same row is not a problem.
A form has many buttons. One of those buttons contains code to update the TableAdapterManager. One of the many TextBox controls has code in a Validating event handler. There is code to make sure a US phone number is formatted properly.If the user tabs out of the TextBox the Validating code works perfectly and show a message to the user if the phone number is not properly formatted and the focus is place in the offending TextBox.If the user clicks on a button that has code to update the TableAdapterManager the Validating code fires but instead of focus remaining on the offending TextBox, the code in the button Click handler also fires.
I would like to stop the button code from firing.Here is the code for the Validating event of the TextBox:
Private Sub TextBoxPrimaryPhone_Validating(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles TextBoxPrimaryPhone.Validating
' Make sure the phone is formatted correctly.
[code]....
What additional coding to I need to include so focus remains on the TextBox?
Am using a datagrid view to display the contents and am also using the same grid to save new entry. here i want to add the contents of one row into Database on cell leave of last cell's cell leave. How can i do this
View 1 RepliesI have a datagridview that I would like to validate using the cellvalidating event. however as the user doesnt navigate between cells or rows in the datagridview. just enters data in a cell in the datagridview and then clicks a save button the cellvalidating event doesnt get fired.
View 4 RepliesI handle the validation in the CellValidating event, and if the cell is invalid display an error message, then cancel the exit of edit mode. However I would also like to erase the content of the cell currently in edit mode.
View 18 RepliesI am having a problem with the DIM statement. It is saying that it can not convert a DBNULL value to STRING even though there is something in the cell.
[Code]...
I am using a combo box on a form in vb net 2008. I would like the user to be able to either tab to the control and then select an
item OR the user could click on the combo box and then select the item.
unfortunately it fires twice when the user clicks on the control. This is before any items are selected. I have tried placing it in mouse down , focus , key down etc etc.
It does not fire twice for the enter event so I tried to use that alone, but then there is no dropping down of the combo box when the user clicks on the control. Is there a way to release the combo box enter event on the mouse click event?
I am trying to wait for the webbrowsers page to have finished loading to then carry out the next part of my code.However i am having problems because the DocumentCompleted event fires twice?
View 9 RepliesI have something like
[Code]...
It only calls once the function and doesn't call it subsequently. How do i make it calls every 2 seconds?
I am trying to create a winform that will allow me to close when the form either loses focus or deavtivate. When I do Me.Show, it will call the deactivate? Is that right or is weird? The way took it was it fires when it either looses focus or is no longer the active form.
Also it seem like I have to click the form in order for it to work right. I tried Me.focus and that does work the way I expected.
I read data into a DS from an XML file. The user has the ability to "Save" or "Save As" at any time. They can also "Open" an existing file or create a "New" one. (brilliant, don't you think?)
I need to make sure I ask the user if they want to save their existing data (i.e. rewrite the XML file) if the DS has changed from the XML load or from the last time they Saved. On Open, New or exit I have been checking the HasChanges function on the DS. This doesn't work the way that I need. I use AcceptChanges throughout the program to commit values to the DS. This appears to kill the HasChanges even though the DS is now different than the XML file.
Is there an event in the DS that fires when data changes? If so, I believe I can set a flag that can be checked later. If not, is there any other way to track that a DS has changed after the initial XML load? Would reloading the XML into a cloned DS and comparing the two work? Seems like a waste of "time", especially with large XML files, but if it's the only way.
I have a class with two descendent classes (child, grandchild):[code]When a property changes in the Measurement class I raise a OnCrucibleOxidizedMassChanged event:[code]However, the OnChanged sub gets called twice, even though I only assign a value to CrucibleOxidizedMass once.
View 1 RepliesI have a problem with a ComboBox to select FontStyle. I need to select the font style twice to fire the event in SelectedIndexChanged Event, that means for example to click "Arial Black" twice to set the text to this font.
View 1 RepliesIm parsing through a xml file and a error is thrown and the event is fired off but the exception is still nothing even though it tells me theres an exception.[code]Thats how the code is set up. It is enclosed inside a try statement to catch the error but when the event is raised "ex" is nothing.[code]
View 4 RepliesIn VS2005 I am using click on some elements in a webbrowser document to perform certain functions, eg print or open MS Paint but for some reason all the mouse events fire twice. A second click on the same element might be intentional so I can't just bypass code if the ID is the same as last time. There are no other calls of Document_Click anywhere in the project.[code]I supposes I could stick a timer on it and ignore any within 1s say but cheers for any more elegant solutions.
View 4 RepliesThis is just stupid. I've been at this for over 5 hours and can't figure out why my freaking commands aren't firing properly. The only ones that fire properly are the Built-in commands "Edit" & "Cancel"
<asp:ListView ID="NewProduct" runat="server" DataSourceID="NewProductSDS" DataKeyNames="ID">
<ItemTemplate>
<div>
<asp:LinkButton ID="accept" runat="server" CommandName="Accept" />
<asp:LinkButton ID="edit" runat="server" CommandName="Edit" />
[Code]...
I'm looking for an event on a form that fires after Form.Load. Specifically, after the form has been displayed. Is there one?
View 3 RepliesI am trying to unit test for data being input into a textbox (txtPrice). If it is not numeric, it throws a messagebox stating that the input must be numeric. However, when I unit test, I can't figure out why my test fires the message box twice.THis is my (simple) unit test:
Public Sub txtBoxes_LeaveTest()
Dim target As frmEstimate_Accessor = New frmEstimate_Accessor ' TODO: Initialize to an appropriate value
Dim sender As Object = Nothing ' TODO: Initialize to an appropriate value[code].....
My understanding is that for unit testing, you declare the sender, and (in this case) set the sender to some value that will trip the message box. 112L should do this on the leave event. I then write my expected, which in this case is 112L, fire the event, and then get the actual out of the text box. I then Assert.AreEqual to ensure the expected and actual are the same.
I want to move a label across the form every X milliseconds. How do I do that? I understand how to use a timer, but don't know how to move the control. Here is my
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Label1.Location.X = Label1.Location.X + 10
End Sub
"Expression is a value and therefore cannot be the target of an assignment."
When I write a byte array to a device using this code, the DataReceived Event never fires.....
[Code]...
AND if the sleep is <40, the event doesn't fire. Is this necessary or am I overlooking something?
Using Visual Studio 2010 / VB.net Windows forms application I have a weird situation occuring. I have a rather simple windows form program I have written where a second form is opened by pressing a button on the "main" form. It is opened simply by the following on the click event:
[Code]...
I've been trying to get a Timer to execute code every 50ms and it's worked okay, but for some reason after doing the code 8 times (i.e. for 400ms) it just stops. As in, won't execute the code any more times. Specifically, it's wired up to an animation (Picture) and a rectangle which moves around the screen (Box). why the timer would suddenly stop executing after doing so for a while? It's the same duration every time.
[Code]....
I execute some code for current on binding source when selectedIndexChanged.Problem is it throws an error when its executed on closing the form. I can wrap in a try catch... but what would the proper way to handle this be?
Select Case TabControl_Lanes.SelectedTab.Name
Case tp_create_Lanes.Name
depotName = CStr(M8DepotsBindingSource.Current("depotName"))
depotID = CInt(M8DepotsBindingSource.Current("depotID"))
End Select
My module's Page_Load event is firing twice for each "actual" load. On the initial load both loads' Page.IsPostBack property is false.I've renamed Page_Load to Module_Load to verify the name wasn't an issue. I've made sure the method isn't handling both Me.Load and MyBase.Load, which has been the case in the past.The only thing I'm doing out of the ordinary is that my module is inheriting from an intermediate base class. Could this be the culprit? [code]I had an Image without an ImageUrl. Presumably this is set by my CollapsiblePanelExtender but rendered with a blank src.
View 1 Replieswhat event fires when individual textboxes that are bound to a data source using the properties pane gets refreshed? I wish to use this event to populate a few textboxes that are not bound.
View 1 RepliesI have a VB .NET form with a splitter control on it, and I want to save its position between program runs. I am currently handling the SplitterMoved event and storing the SplitterDistance. Then on program startup, I set the SplitterDistance to the saved value.
However, sometimes the program resizes the splitter, raising the SplitterMoved event and overwriting my saved distance. I have several splitters over multiple tabs in a tab control, and any time the user goes to a new tab for the first time, the SplitterMoved event fires.Is there an event I can use that will only fire when the user moves the splitter, and not when the program moves the splitter? I tried MouseUp, but when that event fires, the new SplitterDistance is not yet set.
I've got an odd situation with a text box and an autocomplete setup on my page. I'm using a JQuery based autocomplete on a text box that has AutoPostBack="True". This works perfect if I use the keyboard to select an autocomplete item, which then fires Jquery to fill in the text box, and then when I tab out of the box the AutoPostBack fires. If, however, I click on an autocomplete item, my text box loses focus first and the AutoPostBack fires before the Jquery has a chance to change the text in my text box. Is there a way to delay either the PostBack or the Jquery so that they don't fight each other? I'm thinking it may have to be the PostBack that gets changed, since the JQuery would lose it's state on the PostBack.
View 1 RepliesI want to update a database based on the form that is currently activated. I had originally decided to use the GotFocus event. However I now understand that will not work as the form has controls on it. So I then thought I wouls use the activated event. This works but seems to fire multiple times. I put in the following code:
Private Sub frmNewTicket_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
MsgBox("Form Activated")
End Sub
I select the form and make it activated and the message box appears about 15 times.Why does it do this? How should I handle this. I only want my code to execute once when the form is activated.NOTE: There are several forms that the users will be changing between, incuding forms from other applications.
The leave event fires twice in this example. Tab order for the form controls is set to combobox1, button1, button3 Private Sub ComboBox1_Leave(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.Leave
[Code]...
if I enter 'A' in the combobox1 then combobox1 leave event will fire twice any other entry is Ok since the next control to get focus is button2 (in the normal tab order).It seems that if I try to skip the next control (based on the tab order set for the form), the leave event fires twice.
I have focus on button and when I press Enter key button_click event is executed. At the end of button_click I pass focus to text filed:
Private Sub btnAddPos_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDodajPoz.Click
try
[Code]....
And every time I press Enter on button txtNewItemID_KeyUp is triggered. And i don't want that. I just want txt field to get focus when button is pressed (with mouse, enter key, Alt+key combination).