VS 2008 Datasets And Datagridviews?
May 23, 2010
I am novice at best with VB. I have a dataset built from a complex query. Well I have a lot more items in the dataset than I wish to show in a datagridview. Some items will be used for other purposes at the time, filling txt boxes, dropdowns, etc...all independent of the dgv. I am lost at how to fill just a 3 or 4 of the items rather than just filling the entire thing. So, instead of just filling the entire ds into the grid, how would I fill in selected columns into the datagrid that has specifically named columns at runtime?
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Aug 30, 2011
I have 2 forms (form1 and form2). I'm passing 2 numbers from form2 to form1 (see image/attachment). I want to make sure that 1 of those 2 numbers (passed from form2) aren't the same as any number on form1 in column2. For example, if I were to pass the numbers "2, and 3", the program should give an error saying, there is already 3 in column2. It doesn't matter if the first number (in column1) is the same, but the second number should NOT be a duplicate of any number in column2.
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Jun 26, 2009
I discovered a problem in C# (boo hiss!!!) but it applies to VB.NET as well.I decided to build a little app to load info from some audio files using Taglib-sharp (nice little thing it is!) and create a Winamp playlist from the loaded files. (I know it's lame, don't laugh! I just wanted to learn some C#!)I have a form with 2 DataGridViews. I load the first dgv with some tag info from the selected files. I then move those files from 1 grid to the other, shuffling their positions along the way.The annoyance I found is during form design. If I try and name a column in the second DGV the same as in the first (eg. "Filename") I get an error that says the name is already in use by another component.To me this is not right. The column is part of a separate object, shouldn't this mean that "Filename" in object1 isn't the same as "Filename" in object2? I even have to refer to the specific object to get the column's value in a row. [code] to access the column's value in the first row of dgvMine or dgvOther, then why does the darn designer care if "Filename" exists in dgvMine and also in dgvOther? Shouldn't they be separate declarations "within" each of dgvMine and dgvOther?
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Mar 19, 2010
I have an MDI application that shows MDI forms with a single DataGridView on each form. The grid is bound to a List(Of Item), where Item is some class. Now I need to be able to drag (possibly multiple) items from one grid (in one form) to another grid (in another form).
Unfortunately, I know nothing about DataGridViews and even less about drag and drop, so this is turning into a real pain for me...I have been looking at examples for ages, but none of them work for me. Most of them don't deal with databound items, others don't seem to work at all, and yet others can only deal with a single row at a time (pretty useless for me).
This must be something that people need a lot, so I can't understand why the examples are so 'bad'.
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Feb 8, 2010
Is there any way to change the properties of the DataGridViews default tooltip?ie.change it's display duration or text font/size.
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Apr 19, 2011
Have been running this application on 8 PCs since January.My application uses variations of this
Dim Artist4_TBD As New DataView(Me.SSPE_InterCOMM1DataSet.SSPE_ArtScheduler)
[Code]...
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Aug 23, 2011
I have a dgv with a column type = DataGridViewAutoFilterCheckBoxColumn. I want to know if there's a way to I can get that entire column to become disabled (or Enabled = False) so it won't let the user click on the checkboxes. I tried looking in the "Bound Column Properties" but there isn't an option to disable the entire column.
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Apr 14, 2009
I have a product table with ProductId,ProductName,ProductCode as fields. I've populated a combobox with productnames. Next I have two other tables called Result_Header and Result_Detail. The Result_Header table has ProductId as a foreign key and BatchNo,TestDate etc. The Result_Detail table has ResultId as a foreign key which is the ResultHeaders Primary Key and other fields such as Result,SpecHi etc. What I need is when I select a Product from my combobox my two datagridviews must be populated via the Result_header and Result_detail tables respectively.
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Sep 4, 2009
I need to very quickly write an exe system on a laptop where when the laptops are connected to the network they read a database table and store the data locally, so staff can use the laptop while they roam.The laptops have quite small capacity and the company would prefer not to use SQL Express or Access.
My question is, can the data initially be downloaded into the exe application via a dataadapter and dataset, and will that dataset the retain the downloaded data, or will I need to ensure the dataset is written to an XML file and then loaded/unloaded each time the laptop application is started while the staff are travelling ?
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Mar 22, 2010
I have added a column to a table in SQL Server Express - the table is already included in my VB Express Dataset. However on clicking "Refresh" on the table in Database Exlorer I do not see the new column in the Database Explorer listings. I have looked around a bit for a solution to this but cannot find anything under Google.
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Mar 3, 2011
I'm not sure if this belongs in the database section or the NET section. I will leave that up to the moderators. I have converted a few of my VB6 systems to NET. However, I have retained the ADO coding technique. I probably need to update that. Below is a sample from one of my applications. As you can see, I retrieve the data and, based on conditions, I then issue an UPDATE command. From what I have been reading (and not really grasping) a DATASET/DATA ADAPTER combination will do the same thing. If so, could somebody rewrite this small block of code using "proper" ADO.NET techniques. If I see my own code rewritten it will be much more meaningful to me.
Dim cnxn As New SqlClient.SqlConnection(cnxnstring)
cnxn.Open()
Dim sql As New SqlClient.SqlCommand
sql.CommandText = "SELECT * FROM PART WHERE LTRIM(RTRIM([PARTNUMBER])) = " & "'" & Trim
[CODE]...
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Oct 6, 2010
I set up SQL Server 2008 loaded VS2008 and all the ODBC drivers.All ODBC connections for DS and DGV's and using connection strings. I managed to get the connections working when I tested this on a new program.When I copy all the files from my other computer and try to view this it works with the connection string and connects to SQL server fine.But with the dgv I see nothing. Yet if I preview the datasets I get the result I am expecting
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Apr 5, 2009
Whilst playing around with DataGridViews in VS I've accumalated quite a few TestDataSets within my project.
Can someone please tell me the correct way of removing these cleanly? At the moment I've been Right Clicking a DataSet (from within Solution Explorer) and either clicking 'Delete' or 'Exclude From Project'
Doing this throws up Errors in the Error list such as;
TestDataSet is not defined
TestDataSetTableAdapters is not defined
TestDataSet is not defined
TestDatasetTableAdapters is not defined
I then double click each error in turn which takes me to the actual code with the error and delete this.
I have quite a lot of TestDataSets and I'm hoping there is another way to do this much cleaner.
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Mar 24, 2009
I�m fetching data from an access db, filtered by date and an ID. The data is then charted on a form (form1).
I want to be able to "duplicate" the form so that the data that is shown on form1 is shown on a different form. That forms data is not supposed to change when I change the data on the first form.
So far I�ve put som code in a contextmenustrip that opens another form1, but the chart is not showing on that form at all.
I'm thinking that I'm going about this the wrong way so I thought I'd ask you guys what you think I should do?
A little info: When Form1 opens up, it loops through selected dates in a listbox, querying each date. This takes a little time, so I decided to put the data in a dataset on form_load, and then do the drawing from the dataset on form_paint, thus not having to query the database each time the form needs repainting. why the second (or third, fourth etc) form1 doesn�t display the chart?
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May 13, 2010
I have an application that uses an access database to fill datasets. My problem is that I have three related tables, when I add a new users to the customers table The parts table fills with data saved in the database with a cust_id of -1.
I discovered that this is caused by adding a part, not saving it and deleting the customer. I Can add code to stop the user from deleting a customer that has parts but I do not have access to the live database to delete the record that are incorrect.
Is there something I can do to delete the rows that have an id of -1 on the load statment?
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Nov 20, 2010
I am using VB 2008 & Access 2007 for windows forms application having typed datasets while creating connection to DB vb asks to store connection string so i did it now that i want to know where is the actual path of file where these connection strings are stored. b'cas after runnig a macro in Access Database i lost all these connections from Data Source Configuration Wizard Combo Box & also i am anable to create a new connection to Databases.I have tried to reinstall the entire Visual Studio couple of times .
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Mar 24, 2011
1) Do you typically allow Deletions, Additions, and Edits in a DataGridView?
2) Have you found any simple way to use combos in a DataGridView? (See edit below.)
3) What type of binding do you typically use on a DataGridView? Do you manually code it? Bind it to an custom BindingSource object?
I'm accustomed to programming in MS Access and I'm now working on learning VB.NET. In Access I typically use updateable DataSheet view bound forms but this doesn't allow me to separate my business logic and create a Data Access Layer. Now I'm trying to figure out how to have an updateable DataGridView in .NET together with separate layers for Business Logic and Data Access. So far I haven't really been able to make sense out the many things I'm reading about this.
I need my DataGridViews to be easily sortable, filterable, and allow up to 10,000 records to be displayed at one time. I've achieved this using ADO.Net with standard DataTables (all written in code) but all my business logic and Data Access is in the code behind my form.
Edit:I guess I was under the impression that ComboBoxes are really difficult to use in DataGridViews so that's why I had posted question #2 above. I think I need to research this a little more as it's probably not as difficult as I thought it was but it doesn't appear to be anywhere as simple as a combo in MS Access. However, I realize that MS Access has many other limitations that VB.NET does not have.
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Mar 21, 2011
I think I already know the answer to this, but I figured it would not hurt to ask.
Is there any possible way to nest Databound DataGridViews in .NET? What I would like to have happen is for each row in the DataGridView to have a button to expand, which would then give me a DataGridView underneath that. I would like this nested DataGridView to also be able to do this, so I could go n levels deep with them.
Is this possible with the .NET Winforms standard DataGridView? (Or another standard .NET control?) I have seen people reference some third party controls, however they are really expensive, and I don't really want to go that route.
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Sep 12, 2007
I want to copy a DataGridViewRow from DataGridView to another but when I try it I get this error:
InvalidOperationException: Row provided already belongs to a DataGridView control.
is there any other way to copy a DataGridViewRow ?
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Dec 5, 2011
I wrote a program using VB.NET. When I run the executable, it displays a DataGridView that may (or may not) have rows in it. The user can enter data, or hit an Update button to fetch data from a database. (The grid is NOT being used as a DataSource.)The user can also set the font with another button: DataGridView1.font = "..."
If the grid DOES have rows in it, everything works as expected and the font is used in the grid.If the grid does NOT have rows in it, the font does NOT change. Even after the user hits Update, or types in data.He has to entirely exit the program, and rerun it to see the font actually change.
Question: How do I set the font on the grid, regardless of whether it:
Has rows.
Doesn't have rows.
Will have rows later.
I would think DataGridView1.font would ALWAYS change the font. No?
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Jan 20, 2011
I have an idea, but i am not sure how to implement it with code.I have an application where a user can view current bookings for rooms.I have two datagridview controls, the first one shows the rooms and the second shows all my current bookings.What I want to be able to do or more the user, is click on a room and the current bookings for that room (datagridview1) to be shown in (datagridview2).What I think I need to do is apply a filter and a sort in a sub routine, then link my tables with a binding source.
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Mar 3, 2011
im searching the best way for Printing a whole form / Several Datagridviews and some Specific controll contents in my WindowsForm application.
I know the internet is full with bad and good examples. Its hard to separate the Good examples from the Bad examples.
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Jul 22, 2010
I have two relayed tables (teams and players) and two datagridviews. In the datagridview1 i have a combobox with datasource <teams>.In datagridview2 i have a combobox with datasource <players>. In this combo i can see all players. I want to filter and see only the players related to the team of the combo in the datagridview1.
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Dec 22, 2010
In my project,, I have three forms. In my main form, I have a DataTable filled with some data from a MySQL-server.In the two other forms, I have a DataGridView which is bound to a BindingSource, which again is bound to the same DataTable in the main form. So It looks something like this:
Datagridview Datagridview
| |
BindingSource BindingSource
[code].....
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Mar 12, 2011
I have a datagridview with two columns; one named Names the other named Scores. This is my code so far Dim hScore As String() = New String() {strName, lblPercent.Text}
[Code]....
What I want it to do is sort the scores by greatest value to least value, but the problem I'm having is that the scores are stored as strings so they are being read and sorted from left to right. My question is, how do I store the scores in a numeric array and place them in the same row as the name, but in the second column? The names and scores only need to be stored as long as the program is running so I don't want to add anything to the registry or create new files to store them.
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Jan 5, 2009
I have 2 datagridviews on my form. One lists products and when you click on a product in the first datagridview the other lists tests for the selected product. I have a products table with a productid,productname and productcode. I have a tests table with a testid and a testname and I have a prodtests table with a prodtestid, productid, testid and a few other fields.
Public Class frmProducts
Dim myConstr As String
Private WithEvents ProductBindingSource As New BindingSource
Private WithEvents TestBindingSource As New BindingSource
Private Sub frmProducts_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
Also I need to add a combobox column to the second datagridview that is bound to my prodtests table and to list the testnames from the test table in a combobox. In my save button, should I just call both adapter.update methods to save all changes. I will add the appropriate update commands etc.
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Feb 16, 2012
VB 2010 form has 1 panel, 1 DGV in the panel, 1 TabControl with 3 tabs in the panel each tab has a DGV all 4 bound to the same DataSet through code.
I have a form that has multiple Datagridviews on it, 1 in the main portion of a panel and the other 3 in a tabcontrol. If I click on cell 0,4 of DGV1 cell 0,4 of DGV2 is also "hilighted" and the same goes in the reverse order. If I click on cell 1,4 in DGV 1, cell 0,1 is hilighted in DGV2 (basically it stays with the last selected col and what ever row for that DGV).
This isn't the functionality I'm really looking for here, when I single click or change cells on any of the DGV's I don't want any of the others doing anything.
As you can see there are 2 cells selected this was created by a single click in the 4th cell of Param0
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Oct 25, 2011
I have a problem with my DataGridViews, actually i have a form with a TabControl with 8 tabs, each tab have a DataGridView control. I'm populating them when the form load, the problem is that i got kind of a limit here, only 3 DataGridViews are getting populated, not 3 specific ones but any 3 i put first on my code. I'm populating them manually, doing a mysql query, filling a DataTable and then making the data source equal to the DataTable.
[Code]...
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Oct 26, 2011
I have a Form with a TabControl with 8 tabs, each tab have a Datagridview that needs to be populated each one from a different table of my database. I'd like to know if i need to make all the 8 connections and queries or i can apply the DRY principle and how i can do it.[code]...
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Jun 11, 2011
I use Visual Basis 2008 With MySQL. I Have one from with 6 (six) Datagridviews controls I Have the following problem: If i use Form1.Show method than the form1 is only show if data connections are made and all the datagridviews are filled with data What i want is to first show Form1 with alle the empty Datagridviews (6)controls and then After that i want that the program make the data connections and fill DataGridView with data. form1.show ' call form other Form
Private Sub Form1_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load 'in this Load event i make all the data connections en fill the datagridviews
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