Refresh DataGridView After Assigning New DataSource?
Dec 8, 2009
In a windows form I do have a datagridview. When a user pushes the button, the underlying datasource of the datagridview (a dataview) changes and the new content with new columns is shown. This works fine, only problem is that the header-height differs and that the datagridview does not properly display the smaller headers until I click into the first datarow of the datagridview. Simply using the .refresh()-method of the datagridview after assigning the new datasource does not seem to work.
Here is a little code-snippet showing how I assign a new datasource to the datagridview.
Dim view As DataView = myDataTable.DefaultView
With Me.MyDataGridView
.Columns.Clear()
.AutoSize = True
.DataSource = view
For Each col As DataGridViewColumn In Me.MyDataGridView.Columns
col.ReadOnly = True
Next ...
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Jul 10, 2010
I am stuck at a task. What I want is, I am creating a table in the database on the fly in the code behind using the below code(in VB).Now my main problem is I want to display this table which is created in step 2 of a wizard, in step 3 using a GRIDVIEW. But as we all know a GridView needs a sqldatasource for values to be displayed, however what I need for achieving this is dynamically assign a datasource to the GridView, but I am not figuring out HOW?
Dim NewTable As String
Dim FullName2 As String = "Dynamic" + "_" + lblCompanyName.Text + "_" + tbCustomerFileName.Text
'Get Row Headers and map to Fields
readerXML.ReadHeaders()
[code].....
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Jun 23, 2010
i was wondering is there anyway to stop the error popup messages when i assign a datasource to a DataGridView (and there are errors). i was hoping i could wrap the assigning statement into a Try Catch and handle the errors myself instead of having them popup.
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Sep 8, 2009
i have datasource with stored procedure.Now my stored procedure is changed with new column .In datasource panel i click with refresh button, but i don't see new column how can i ?
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Jul 30, 2009
I have several problems with rows in a DataGridView. Background information: The DataGridView (DataGridViewCalib) is in one TabPage of a TabControl, some columns of the DataGridView are automatically DataGridViewCheckBoxColumn as the DataSource have some colums which are Boolean. This is a Windows Form written in VB.Net with Visual Studio 2008. The user loads an input data file.
The problems:
1) At first arrival in the TabPage, ShowDataGridViewCalib (code below) is called. All rows are then shown in the DataGridView, despite the code saying that some rows should not be visible. Breakpoints in the code show that the code do arrive at the Rows.Visible = False events. Despite all rows beeing shown a Watch in the debugger shows that:
[code]...
There are two alternative ways of handling the rows in the code. The first attempt (commented away here) is probably the "nicest".
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Dec 8, 2010
My application must display some data in Datagridview (status of COM ports communication) and i Used .mdb databases before for faster search and Datagridview update. How i understand Datagridview is importing data from DataTable and data in DataTable is imported from .mdb file, so i decided to make shortcut - stop to using .mdb file (data must be erased every time application start and it is useless make .mdb file and erase it every time, becouse it is increasing even when drop is used) and using only DataTable..
I want to row in Datagridview change it color to red when it's Collumn(6).text countains %error% string..
When Error in COM port is starting, i can fast find row in DataTable for that port and write information that Error accured for that port and DataGridview automatically updates:
Dim RRow as () DataRow
RRow = ds.Select("Port = 'COM3')
RRow(0).Item(6) = "Error Opening COM3"
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Sep 28, 2011
i have a datagridview on a form which contains studentname (in alphabetical order) and a blank rollno field according to the particular class.Now what i m suppose to do is to assign roll no on button click, starting from first student to last student.
[Code]...
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Jan 9, 2010
I don't know if I worded this properly, but I have a mdb query that I display in a Datagrid on my form. The first column is TransactionNumber, which is the primary key and a running total (ex. RackingTransactionKey=RackingTransactionKey + 1). What I need to do is when the form is opened, find the highest (last) TransactionNumber from the query or Datagrid and assign it to a variable (RackingTransactionKey), so I can can update it (+1), therefore generating a unique number so I can add data to the query.
[Code]...
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Sep 28, 2011
i have a datagridview on a form which contains studentname (in alphabetical order) and a blank rollno field according to the particular class.Now what i m suppose to do is to assign roll no on button click, starting from first student to last student.
Roll no is like 11DCE001...For eg:-
Roll No StudentName
11DCE001 A
[code]....
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Nov 17, 2010
When I try to change the datasource of my DataGridView, I am loosing the order of the columns and their type(checkboxes,comboboxes) that i specified on designtime! It's like changing the datasource is generating again the datagridview, why ? and How can I change the datasource without losing these information ? on form load i do something like
Private Sub frmGrid_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Path as string
[Code].....
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May 12, 2010
I have created a Datagridview by dropping in from the Datasource. After I changed one column to be a Checkboxcolumn but it does not represent the values. In the table (smallint) I have 0s and -1s but it doesnt matter what I enter as True and False Value in the column it just shows that the box is checked.
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Feb 26, 2009
I have a DataGridView and in it a CheckBoxColumn, when I click a cell of that column the check box gets checked.I do it like this:
dgvMessages.CurrentRow.DataBoundItem("have_read") = 1
but the change does not get committed to the DataSource (or at least not immediately), so when I search through it I get wrong results.
I can't call AcceptChanges as that will refresh the grid and cause unwanted side effects... What can I do about this? Is there such a thing as an 'AutoCommit' property on a DataGridView?
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Jan 13, 2012
my question is, is there a way to filter records in the dataset and use that records to fill in the datagridview? for example, a datatable (with 3 columns: ID, StudentName, Gender) is filled with list of students. i have two datagrids in the form namely DatagridView1 and Datagridview2. DatagridView1 is where the the list of student where Gender is equal to M and DatagridView2 is where the the list of student where Gender is equal to F.in my current solution, i am using a loop.
[code]...
is there a way without using a loop?
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Oct 13, 2009
I simply cannot understand or see when a DGV's DataSource (a DataTable in my case) get's updated when a new row has been added to the DGV by the user. I have looked at row counts in the DataTable at every possible event and cannot "get" the correct number of rows (which I ultimately need to "get" the GetChanges(DataRowState.Added) of the DataTable.So, here's what I've done.1. The DGV is populated on the FormLoad event. It includes a ComboBoxColumn which has it's own datasource. All fine.Now, let's say initially there is 1 single row in the DGV. There is also and "empty" row at the bottom of the DGV, all cell values are empty.if the user Clicks the ComboBoxCol and chooses an item, then this actually creates a NEW friggin' row, RIGHT?!No. Not exactly. At least NOT in the DataTable (The DGV's datasource).I attempted to "check". Looked at the editingComboBox_SelectionChangeCommitted event:
Private Sub editingComboBox_SelectionChangeCommitted(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles editingComboBox.SelectionChangeCommitted
Dim rct As Integer = ImprovementsEntity.improvementTable.Rows.Count
[code]....
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Feb 17, 2011
I have an app that has a DataGridView with a few buttons. My intent is to have the DataGridView populate with the data associated with the button clicked. So if you click the States button it'll fill the DataGridView with the DataSet I have created with a link to a SQL table with a list of States.
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Jan 31, 2012
I have a problem refreshing a DataGridView control after Insert or Update. The source code: Get all rows from table in datatable and set to the datasource:
[Code]...
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Feb 2, 2012
When i finish inserting/updating the datagridview doesn't refreshing..[code]
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Oct 9, 2008
I tried this, but all of my rows dissapeared. [URL]
vb
Private Sub BindingNavigatorDeleteItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BindingNavigatorDeleteItem.Click
If MsgBox("Are you sure you want to delete selected record(s)?",
[code]....
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Nov 19, 2009
i am editing the data of access database through datagridview.after adding data the data that i have edited dat is not being edited in datagridview.
how to refresh datagridview so dat the edited data can b shown without reopening the form.
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Mar 21, 2011
I'm working on VB .NET 2008.
Target: Bind dynamic datasource in a cell of a Windows.Forms.DataGridView depending on the selection in previous column. The grid must have 7 columns. If the selection on comboboxcolumn 2 or 4 is done, the datasource of comboboxcolumns 3 and 5 mus change using a query with previous selection as parameter.
In a first try to develop this functionality i've tried to use Telerik.WinControls.UI.RadGridView control. I've created a customized celltemplate with a combobox in order to have different datasource for each cell on the same column. All worked fine but seems to be some kind of bug in RadGridView, because when the combobox is presenting the list, after selection the list continued showing, doesn't dissapears as expected.
Ok, after several days of fight with RadGridView, I give up, and I tried to use same strategy but using Windows.Forms.DataGridView. I've created two classes one inherited from DataGridViewComboboxCell and other from ComboBoxColumn, in order to insert my own combbox or have the chance to have access directly to the combobox values. But the combobox showed is the default combobox not my own combobox.
how can I create a custom comboboxcell but using my own combo, and having access from outside to this combo?
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Feb 17, 2010
public Enum ClaimStatus
Ongoing = 0
Completed = 1
[Code]....
With code above, how do I assign the value to the combobox while retrieving data from the table so that it point to the corresponding combobox item. For example, if the value of status_ID is 1 then the combobox should show "completed" in the datagridview.
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Jun 2, 2010
I have a datagridview with a datatable in a dataset as a datasource. When i add a new row in the datagridview it is automaticaly added to the to the underliyng datatable (its datasource) . However it will only be addad after i click another datagridviewrow. I would like that update to be just after i added the row or after i edit one of its cells and not only after i click a different row.
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Oct 13, 2009
Posted this over at WinForms forum, just not much activity and thought I might get a quick response here....Not real certain if I am implementing this correctly, but I am attempting to programatically modify cell values in a DataGridView control with an underlying DataTable as it's DataSource.
[Code]...
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Sep 30, 2009
I have a datagridview with 3 columns.
Now I need to fill the datagridview's datasource with 3 arrays.
Example:
(column1) Username- Joe - Mark - Thomas
(column2) Password - Joe - Mark - Thomas
(column3) Activiated - Yes - No - Yes
Then after i split what should I do? Should I add 3 arraylists in a class or should I use structure and how?
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Jul 11, 2011
To add Row programmatically,
Connected Datagridview with datatable
I like to add Blank Row in the datagridview, So
On the Last Cell, CellLeave Event
Datatable1.Rows.Add()
It is adding a row in the dataTable, but adding two rows in the datagridview, why...?
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Nov 30, 2009
I'm trying to use a datagridview as the datasource for my mail merge, but I'm having trouble getting all the data to output to the word doc. I've based the below code on the following tutorial:
[Code]...
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Jul 30, 2011
This is my first time really working with DataGridViews. And for my own learning, I am trying to create a "System Information" program. I understand you can easily do simple stuff such as:
DataGridView1.Rows.Item(0).Cells(0).Value = "OS Name"
DataGridView1.Rows.Item(0).Cells(1).Value = My.Computer.Info.OSFullName
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Jun 11, 2011
My current problem is this:I have a form and I have in it three textboxes, 1 button and 1 datagridview; I also have an acceI'm learnig now on how to create a report without a database. But In how to set the datagriview as the datasource for my report
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Mar 9, 2011
I've got a VB2008 application that can potentially generate a table with up to 540 columns. The table is then used as the DataSource for a DataGridView. With column counts in the hundreds the processing time can by over a minute. With all this in single threaded Form code the UI locks up until the DataGridView is loaded. I've taken time stamps of the process to find out where the majority of time is spent.
[Code]...
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Apr 19, 2010
I'm learning some more VB in my spare time, and I'm making a simple customer database that uses SQLCE. I've got the datasource set up and all that, but for some reason when I hit accept on the form, nothing happens?
[Code]...
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