Saving Datagrid Changes Dynamically
May 23, 2011
i have been using to save any changes to the datagrid to the database which had the name statically assigned like this [code]I then decided to allow the vb program to access any .mdb file dynamically by using and open file dialog which all works fine except for my save button which again has all of the field name set statically like Record,[code]can anyone suggest a replacement for the code that would solve my problem i have also attached a screenshot with the original database or statically defined database opened can anyone suggest code that will do what the above code does dynamically so it can open many database files.
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May 23, 2011
I have a search form on that will be pulling search template queries from a table in the underlying (an Access db on a share). The search form has a calendar control for filtering by date range, a listbox containing the names of the search templates, a second listbox which lists the fields in the selected template, and then some controls which show/hide themselves depending on which field is selected so that the user can pick a field and enter it's unique criteria in the appropriate control for filtering. Below these controls is a DataGrid, which will obviously display the results.
The problem is how to dynamically "transform" this DataGrid to display the selected search template. These templates do not represent tables in the underlying; rather they represent preconstructed SQL queries (stored in a table) which are essentially SELECT queries with joins and no WHERE clause (so they are the results of multiple tables joined together by their keys).
To be honest, I'm having trouble even generating the LINQ queries to represent these template dynamically, but that's not as important, since I can manually translate the SQL queries into LINQ. This is definitely not the preferred method, as the whole point of putting these templates in a table, rather than code, was to allow for future additions without rebuilding/redistributing the application interface.
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Apr 24, 2012
I have created a sample form as
[Code]....
Now I would like to save this form as .vb file and include it in my project. Similar I have created in PHP where output html and saving as .php file is easy. This I have used as a initialize function as i start doing some project whose database has been created already.
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May 3, 2012
I'm trying to bind a dataset to a datagrid. I've found many examples online... all look similar to below. My problem is that the bind seems to work, but nothing shows on the datagrid. It's blank. Both rowcounts in the message boxes display the correct number of rows for both the dataset and datagrid. Does something need to be initialized in the datagrid properties?
[Code]....
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Jul 27, 2009
How should I add a datagrid column dynamically on selectedindexedchanged?
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Apr 20, 2010
Let's say that I have a windows application in which I have a form with some controls that are bound to a dataset. A DataAdapter or TableAdapter fills the dataset on form load with a large number of records and user can navigate and change the details for each record. This works fine ... but this app runs on a network. And let's say meanwhile you've loaded your form and you're navigating through it (for half an hour let's say whithout saving changes or reloading the dataset) another user modifes the data and updates the database but as long as you have your application running you can't see those changes !!! what is the method to know whether the database has been updated or how to refresh the datagrid view with the new changes updated by other users while the application is running?
code is
Imports
System.Data.OleDb
Public
[Code]....
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Jan 14, 2012
I have a rather straightforward question.How to I get a DataGrid in WPF to save/load raw XML files and have the ability to display/edit them with other controls? The application will only work offline so I won't need SQL. Just simply open, edit and save data to XML.
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Jan 26, 2011
I have a form that shows users data from a sql query. What I want to be able to do is when users make a change, they press a save button, the edited/changed data is saved to a new table and then the window is closed. I've looked for several tutorials for this. Can anyone give me an example of a good tutorial or a code example?My database that the user would be saving to is called exceptionsedit.
The code I have this far is this:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles saveButton.Click
[code].....
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Feb 20, 2011
How can i make it so i have like 3 textboxes
and if they are filled in and u click on save it all gets saved in a DataGrid Form
so after u restart the program its still there and ready for use?
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Oct 12, 2011
I am trying to save my data on datagrid to access and I got this error :| Object reference not set to an instance of an object. and is referring to this Me.myDA.Update(Me.myDataSet.Tables("Goods"))
Here's my code
Public Class frmGoods
Dim con As New OleDbConnection
Dim myDA As OleDbDataAdapter
Dim myDataSet As DataSet
CODE:.......................
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Apr 29, 2012
IM making a password and username and website recorder and how would i save it all to a file? (and load)
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Dec 2, 2011
I'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"
Try[code].....
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."
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Apr 22, 2009
Using VS2005. The code below saves a datagrid (datagridview1) to XML file and works well. But if newPat is true then I want to save the extra data in the XML file as well. But it doesn't work for some reason. When newPat is true it just saves the XML file as normal but without the extra row.
It seems this code is not working what so ever. I tried replacing
dr("patientName") = gridrow.Cells("patientName").Value
with
dr("patientName") = "test"
And it didn't work, it still saved the names that were in the grid.
newPat = true
For Each gridrow In DataGridView1.Rows
Dim dr As DataRow
[Code] .....
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Mar 11, 2009
ive added a datagrid view to my form and ive also linked it to a database which displays the details i need. but what if i want to delete any rows(records) from the datagrid or edit. i need it to also change in the database. whats the coding? ive tried n tried but cant seem to get the code. its vb.net 2005
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Apr 7, 2011
Basically I have a DataGrid on a form that is used to monitor attendance. I do this by making the data types for the relevant fields boolean so that at runtime, they appear as check boxes that the user can tick. If the user ticks this then the table in MySQL saves this as a 1, or if it is left unticked the table saves it as a 0. I then use those values in a mathematical equation to calculate weekly attendance.
My problem, however, is with saving changes to the table itself. Initially I set a primary key which was fine and allowed me to save. However I needed to turn that primary key to a foreign key and when I do that, I am told that I need a primary key. Now I got round that before when I was entering data into a text box and in my SQL query I'd simply put as my value being " & (name of textbox).Text & " but when I am entering data straight onto the datagrid, I am unsure of what to put in my SQL statement.
StudentID (Was primary key but turned it into foreign key)
Name
Surname
Monday
[cod]....
My friend from college told me it's probably because there are multiple records in the database and can't distinguish between the two (as perhaps there's no WHERE clause in that UpdateCommand) but I doubt it as it was working perfectly well with multiple records when StudentID was a primary key.
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Aug 22, 2009
I have a datagrid where the first column is for image button for expand purpose. The visibility of the image depends on some conditions row by row. I am trying to handle this in ItemDataBound event, and using e.item.cell(0).findcontrol("imageButton").visible = false. The first cell of this row therefore disappears even that the size is specified in the ItemStyle tag.
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May 22, 2010
I have an Access DB that lists customer details in a datagrid and in textboxes, when I use the edit button I can edit in the textboxes and when I click save the record is saved and shows in the datagrid. But when I exit the program I get "Syntax error in update command" Im not sure why because there are no errors in the error pane at the bottom
This is the code for save button
Private
Sub
btnSave_Click(ByVal
sender As
Object,
ByVal
[Code] .....
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Mar 15, 2011
I have this code.
Code:
Public Class Form1
Dim NPB As Button
Dim x As Integer
[code]....
As you can see, when I open a program from my menu, a new button will be created with text similar to this, "C:Program ". The button it self will not do anything. How can I create the method at the same time the button it is for is created? Also how can I change the text do that it gives me, for example, CCleaner.exe instead of the whole target path?
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Feb 12, 2012
Currently I am saving data from my applications by saving a text file via a stream reader as a string. I have come to a problem. In my current application, I have an array of the following structure:
[Code]...
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Apr 16, 2011
I have a problem. I'm working on this advanced web browser with my friend, and we made a favorites feature. So, it works and all that, but, after I close the executable file, it doesn't save anything!
Ex:Starting Up, adding Google as new favorites, then closing the browser. Starting up again, 1 hour later, but there's no Google Here's what I put for saving the favorites (please do not steal the code Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
[Code]...
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Dec 5, 2011
I can usually find the answers to most of my questions via the Google Gods, but not this time.I have a form that has a TabPageControl and on that page a collection of labels and text boxes via a usercontrol.
On the form I have a button that allows the user to create a new tabpage, when the code adds a new page, it automatically adds the UserControl collection. I can't get my head around how to access the objects on the newly created tabpage.
What I need to be able todo is take the index of the tabpage that has focus and translate that against the UerContol name, but I havn't a clue how to do it!
[Code]...
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Dec 16, 2011
I am adding a grid of buttons to a form at run-time, and all of then use the same Handler.My question is : Is there any way I canadd the TextBox at run-time ?I know how to but without it on the form, the IDE isn't very happy about the "MyClick" Sub - TextBox1 is not declared......
' some logic here to make nice rows and Columns of buttons
' with different .Text and .Name
Me.Controls.Add(btn)
[code]....
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Oct 16, 2011
I have a datagridview with transaction bindingsource I want the datagrid to show the sorted rows only not all the records when i enter a value into a textbox and click button sort.
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Apr 15, 2008
What I am trying to do basically is open an access query in a datagrid view and then be able to make changes to the datagrid and then save it back to the database.When I try to save:
Me.BindingSource.EndEdit()
Me.TableAdapter.Update(DataSet)
It says that update is not a member of the tableadapter... Why is that?
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Dec 13, 2009
now i use acces as datasource to view the agenda in a datagrid and a combo box to select a year or month so i can find the selected month or year in the datagrid .how do i program it so that it searches the selected year or month in a datagrid
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Mar 20, 2012
I have a datagrid who's ItemsSource is a strongly typed IEnumerable object In this datagrid, I have a checkbox column, a price column, a part name column, and a 'total selling for' column. On checking the checkbox I need to update the total selling for column with the value in the price column. This part I have working, however, how can I get the checkbox to remain checked when this happens?
Private Sub UpdateSellFor(sender As System.Object, e As System.Windows.RoutedEventArgs)
Dim _CB As CheckBox = DirectCast(sender, CheckBox)
Dim _ID As Integer = _CB.Tag
Dim _PP = DirectCast(DG_PartsToSelect.CurrentItem, PartTyping).PartPrice
[code]....
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Jan 22, 2009
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..
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May 9, 2009
I have a datagrid which I am using LINQ to fill, I then add some custom columns and fill them in programmatically - if the users clicks on the column header to re-sort, all the data in the added columns disappears. I am obviously missing something very basic here but can't seem to see the forest for the trees. I also have a couple of other questions about how I am doing things:
[Code]...
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Oct 16, 2011
I am trying to create an xml editor that read and write xml. my code reads the xml with no problem and allows me to create new rows but when I try to "write" it over I get the following error: "Token StartElement in state Epilog would result in an invalid XML document"
here is my xml:
<?xml version="1.0" standalone="yes"?>
<MacroList identifier="test">
[code].....
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Aug 24, 2011
I decided to rewrite my project. Hit another snag. How do I write the contents from a datagrid to a file and back into the datagrid again later? (Actually, I've done the writing ok - but for the life of me can't get the data back into a blank datagrid.
Here's what I done so far:
Imports System
Imports System.IO
Imports System.Text
[Code]....
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