I am attempting to trap/check for any edits in a DataRowVersion.Proposed method
Why am I not able to see the changes from a bound field (to a textbox) from a DataSet? When I load the WindowsForm, I bind the TextBox:
If Not m_dsFIRE.Location(0).IsMHNull Then
Me.txtMH.Text = m_dsFIRE.Location(0).MH
orig_MH = m_dsFIRE.Location(0).MH
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I have a form that has a checkbox value for field 4. What I'd like a user to do is to be able to check that checkbox and when they fire the holidaysavebutton event, that my code will look for any of the checkboxes that are checked and save that line of data to my database. As the code stands now, I am able to get the first line to do this, but none of the lines after will save the data.
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I am having trouble understanding how ado.net works with proposed / current values of data. Can someone please explain the process of a new dataset with data in; a new row added and updated to the live database and then that row modified and updated back to the live database?
This would help me out a lot as I can't seem to get my head around it.PS. Sorry for being a novice. I have googled and I also have the Murach's VB.NET database programming ADO.NET but just can't seem to follow it. Could be because I am an old school developer.
how to make a program save, open, or create new but now I have some other add-ons I want to add.I am not sure I can do this but how can I set default files like Text documents to open when I double click one without the error message saying that it's not a valid Win32 program? Also how can I make multiple fonts on a document? Same with color so I can bold some parts and not all, and making the program open itself when I click new for another copy without losing work and when you click close and there is unsaved data it asks if you want to save it. [code]
View 2 RepliesI have a form with the datagridweiw object. I have connected it to the datasource and it displays the data fine. I also have set the persissions for editing. I am assuming i need a button for accepting changes to table and a button to cancel. My use for the form is to add or delete rows of data and save the changes. The database and application are both in visual basic and sql server express both 2008.
View 6 RepliesI have a dataset that is populating a table adapter that I want to be able to save any edits/changes that are done to the dataset back to the database. I know that I'll have to do a loop similar to this one[code]...
View 14 RepliesI'm creating an admin application that will allow specific users to manage users login credentials for an application. On a form I have a datagrid that is populated by selecting * from Operator table on the DB. I want the admin users to be able to add, edit and delete records from the datagrid and i have enabled these properties on the grid but any changes need to be confirmed by clicking a 'Saves Changes' button. Here's the code behind this button:
vb
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Const cSUBNAME As String = "btnSave_Click"
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I have added a new record but when I save these changes I am getting this error: "02/12/2011 11:43:56,frmOperator,btnSave_Click,5,Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information."
I have a dataset that is filled by a tableadapter and what I'm trying to do is to figure out how to loop through all of the rows in my dataset and determine when someone has edited/changed the row and then to post those changes back to my database.
View 1 RepliesI have a dataset that I'm trying to loop through to be able to save any changes made to that dataset and update my database doing so. Can anyone offer any code to do that effectively?
View 1 RepliesInside the program I have a text box in which a user puts in the filepath to a textfile that the program then uses as a series of commands to perform tasks. This works perfectly, however what I would like to to do to make my program faster is associate the file extension .gam with the program, so when a user clicks a .gam file it opens the program and automatically sets said file's location into the text field, as opposed to using the browse button I added and browsing to said file everytime they run the program.
Through this a user could then make a shortcut to said .gam file and run it right from their desktop, as opposed to rummaging around in folders and whatnot. At the moment my method has been thus, I have 2 folders of importance I have archived with the .exe, Gambits Pro.exe, these are: Gambits, and Control, inside of the Gambits folder is the default storage location for .gam files, as when you click the browse button its default directory is that folder. I have also added a few example files in said folder for a user when they download the program.
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I'm currently working on this .Net/WPF project. I'm trying to get the method to check to see if a skin file exists before applying. I have feeling that my address formatting my be wrong....
Dim lobjSPEConfigService As SPEConfigurationService = New SPEConfigurationService
Dim lobjSkinFilePath As String = CStr(lobjSPEConfigService.GetApplicationSetting("SkinFileLocation", GetType(String)))
If String.IsNullOrEmpty(lobjSkinFilePath) Then
lobjSkinFilePath = "/SPE.Infrastructure.UI/Application/Resources/Skins/LightSkin"
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The file is being referenced thourgh the project...
I want method which can check if microsoft office word spell checker is present. If version less than 2007 are there I check if ""C:Program FilesCommon FilesMicrosoftSharedProofMSSPELL3.DLL" this dll is present, but for officewe don't find this dllat this location. I'm looking for a method which will check for spell checker of the various version of Offices.
View 5 Repliesthere, I haven't been using Visual basic for long and was wondering how I would go about solving a problem I have. Basically I have a list of link in notepad which look similar to this (just a lot more of them):
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is there a method check the number of records in data reader? like the count of rows. ?
View 2 RepliesIs there any way to use the TryParse method to check for letter text input?For example, a user needs to input a name in a text box. Is there anyway to check that input are all letters?
View 4 RepliesI'm afraid this is a very simple question, but I can't figure it out... I hardly ever use the DataGridView (usually use a third party grid) so I never needed to do this before.Anyway, I have a DataGridView that is data-bound to a List(Of SomeClass). The grid is not ReadOnly, but I made every column ReadOnly except the very first, which is a boolean column so it displays a checkbox. This way, the user cannot edit any cell value, but he can check/uncheck the checkbox in the first column.
What I need now basically is an event that is raised when the user (not programmatically) changes the value of this checkbox. I also need to be able to retrieve the bound item from that event (from the row number I think?) but that should be no problem, I hope.Anyway, there's a bunch of events that looked promising but all have something I don't want:
1. CellBeginEdit - Fires before the checkbox value has changed, so can't use this.
2. CellEndEdit - Only fires after the edited row loses focus. I want to save it back to the database as soon as the user changes the checkbox value!
3. CellValueChanged - Same problem as nr 2.
I'm sure it must be possible for me to react as soon as the user changes the value of the checkbox? How can I do this?
Use the "new" keyword to create an object instance & Check to determine if the object is null before calling the method. I'm reading text from a text file using the following [Code]
View 9 RepliesConsider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:
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'pressing F1 key on main form. I dont know how to trap whether user pressed F1 key or not
Private Sub frmMain_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
Dim KeyAscii As Long = Asc(e.KeyChar)
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I'm using Vs2008 and I have a combox in a Windows form.I woud like to know how I can capture the tab key after the user has select an item in the combobox.
View 12 RepliesThe fileupload control works well for files < 4MB (maxrequestlength), but if the file is larger than this the program fails with: - Server error in '/xxxxx' application Maximum request length exceededHow do I trap this so that I can return a better error message? The failure occurs before the Page Load from any callback, so I can't see any way of trapping the error, and I haven't seen any event or property of the Fileupload control that I can set to say "Do this when Max Request Length is exceeded"
View 16 RepliesDoes anyone know how to trap f.i. the SelectedIndexChanged event in order to read the SelectedValue from the ComboBoxColumn?
View 8 RepliesWith the component I am using, I only have a keypress event. So I cannot seem to figure out how to trap the control key. The lower case z is reported as keyascii 90 and the upper Z is 122 but can't get the control to show me when debugging. This is where I'm at (trying different ways, none working) Can someone tell me how to trap a ctrl-z correctly with this keypressevent?
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I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.
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I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.I have the following code:
public sub NavigateIE
dim ieobj as shdocvw.internetexplorer
ieob.navigate ("Some URL")
end sub
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How can I link the DocumentComplete event of ieobj to the subroutine named customeventforieobj?
Are there any way to trap key when the DateTimePicker is dropdowned?
I have tryed many ways but no effect.
I need to create a monitoring mechanism using SNMP (in .Net). I think we'll be using an nsoftware component to handle most of the work. It appears we must use 'traps' to communicate from the agent to the server. We'll have a number of different traps and various information detailing each trap. What is the best way to implement custom traps? That is, what is the best way to not only send a trap, but also send the information describing the trap to our 'snmp manager'? I think this is done through "variable bindings". To use "variable bindings" do we need to create our own "enterprise number" and use an "enterpriseSpecific" trap? Should we implement our own, custom MIBs or can we just send the data we need with the trap (via variable bindings)?
View 2 RepliesI have the an ASCII message of SNMP traps, how can i sent it to different IP address? i dont want to use email instead. Given a IP address and the port, of that receiver machine. tell me the solution or where can i get references to the command at least. coz i could find anything regarding it.
View 2 RepliesI am trying to prevent the user from typing dupilicate decimals or periods into a data entry form. The code below has all been tried and yes, there was a do something in there. This is just a sample of what I tried. When I could not trap "." I moved through various renditions of the e.keyvalue still no luck. I know it is simple and stupid but it darn sure escapes me...
If e.KeyValue = 110 Then 'NUMPAD DECIMAL
If Me.MultiplierTextBox.Text = "." Then
End If
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How do i trap a connection string that is disconnected?
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