DataGridView To Bind Or Not To Bind?
Sep 2, 2010
I'm currently developing an application with a reasonably complex DataGridView that allows the user to build the lines of a sales document: Quantitiy, Description, Price, etc with some additional fields to help calculate price based on cost or discount i'm sure you get the jist - all this means we're not just diplaying data but adding and manipulating it - It also means there's mainly decimal fields, nit just simple text fields
Now, i'm new to VB.net, so i've perhaps done things a bit backwards during my learning curve, namely designing and coding my DGV before creating the underlying database table and binding to it - so as i'm sure you can image there's a bit recoding to do to allow for the fact that it's now bound to a datasource.
I'd got the DGV working just how a wanted it to, but now that i've bound it to a datasource i'm hiting multiple problems with: Formating the appearance of figures in the DGV Problems with blank fields while enering data (before the i try to save the data back to the database) How the DGV is functioning - it seems to behave differently when adding lines to a new sales document than it does when adding lines to an existing sales document
And given that when saving edits to an existing line i need to provide a valid update command i'm begining to think that it might be easier to scrap the databinding altogether and just Select, Add and Edit the database with code rather than binding the DGV in the IDE
I've read various threads about avoiding databinding due to it's limitations, but i've also read that it's far better in later versions of Visual Studio and .net. and i'm using VS2010
I'd just like some advise as to whether my gut feeling is right or whether i should persevere with databinding the DGV. i've noticed some quirks of databinding while working with other controls such as text and combo boxes, but i've overcome these and the result seems to be easier than coding the data transfer manually.
But i'm really struggling with databinding the DGV and the fact that i'm dtatbinding to a seperate table to the rest of the controls is leaning me away from databinding
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May 7, 2010
I have a form called studentForm which has a studentCombobox, studentTextbox and a studentDatagridView
In the constructor of the studentForm I need to bind studentCombobox to the StudentbindingSource of the main form and to bind studentDataGridView to appropriate binding source in the mainForm.So that this datagrid view displays all the bookings for the studentID currently selected in studentComboBox
studentComboBox.DataSource = MainForm.StudentBindingSource
studentComboBox.DisplayMember = "StudentID"
studentDataGridView.DataSource = MainForm.StudentDataSet
studentDataGridView.DataMember = "Names "
This is the code I wrote in the constructor
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Feb 28, 2011
I am trying to bind my SQL param's qurey to bind to a table. My problem is i get this error "Fill: SelectCommand.Connection property has not been initialized."
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
If RadioButton3.Checked = True Then
Dim connectionGrid As SqlConnection = New SqlConnection("Data Source=BST;Initial Catalog=dsfs;uid=dfsdf; pwd='dsfsf'")
Dim commandgrid As SqlCommand = New SqlCommand()
[code]....
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May 17, 2011
How can we databind a datagridview to some of the My.Settings (user scoped) properties so the user can edit the values? This must be to a datagridview. I know we can bind to My.Settings in a form with textboxes and so on, but in this case we just want it as list of editable strings in a datagridview.
Of course some My.Settings entries can have different datatypes which complicates matters but generally we're only working with strings and booleans. Also, let's assume the user understands that he must enter the string "true" to set a boolean to true. No checkbox column needed. Here's what we are using (and it works), just looking for a better, leaner way: [Code]
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Mar 8, 2010
I have a datagridview who's datasource is a BindingSource. The problem that I need to resolve is that the DGV has 6 columns, 5 of which come from the same database table, while the other column comes from another database table. Is there anyway of configuring the BindingSource that will make it contain all 6 columns?
The same grid in Part 1 works in the way that when a user selects a row, textboxes and comboboxes are populated with the DGV Row of data in order for the data to be modified. When the user makes any changes, this modified data needs to update the DGV row or BindingSource. How do I associate the changed values back to the BindingSource or the DGV?
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Sep 20, 2009
bind a picturebox from my db or datagridview with some example of code?
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Feb 21, 2012
I wrote small program which is reading xml data to datagridview (table). I used open file dialog and everything works fine. Now I would like to add some edit options to my program (add, delete, save). I decided to bind data and then use binding navigator?
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Jun 22, 2010
I have bind the DataGridview with DB. To add the data from textboxes to DataGrid, I use the foll. code-
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Try
Dim row0 As String() = {TextBox1.Text, TextBox2.Text, TextBox3.Text}
[CODE]...
Error is coming: Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound. there is no any way to add data to the Gridview if we bound it to the Database.
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Dec 5, 2009
I'm planning to create a program that would bind the search results into the datagridview in vb.net. For example, listing of students that has the same course in the datagridview.
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Oct 27, 2009
me how to bind the dataTable to dataGridView??
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Nov 24, 2011
My code works fine but what I'm trying to do is bind the data without it inserting the column names in the mysql table.[code]
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Feb 5, 2012
I have a Datagridview with a bound datatable in it. Then I add a check box column to it.
When I click the headder of the DGV, it sorts the bound columns, and clears all checked checkboxes in the checkbox column.
How do I bind the checkboxcolumn to the rest of the table?
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Mar 26, 2010
I have combobox in a form. The combobox is bound to a table and displays the list of values as expected. What I want to do is also bind the combox to another field in a different table similar to the way the datagridview with combobox works. That is the dgv is bound to the combobox column but the dgv's bound value sets/reflects the value selected by the combobox. I can't figure out if this is possible with a standalone combobox.
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Jan 7, 2010
I have datagridview control with combobox as first column. I want to bind combobox to datasource.How can I do it?
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Nov 12, 2010
i am created Window based application .
i want to bind datagridview source to datatable .
whenever i write
Dim dt As datatable
dt = dgvtest.datasource
Error occur ?
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Feb 24, 2009
know it is possible to have bounded and unbounded columns in a datagridview.Is it also possible to have bounded and unbounded rows?I knows its unorthodox, but I want to have two rows in my datagrid per item in my object list One row is bounded to the properties of each item; below that I want an unboundedrow of checkboxes for each property But since when binding the datagridview sets the rowcount equal to the list count, I'm not sure its possible.
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Nov 18, 2010
I have a DataSet with many tables and a single DataGridView. I need to select a value from a combobox and then pressing aButton to show the selected table to the DataGridView. For example if I select from combobox "Selection1" I would like to show to the Datagridview the contents of the table called Selection1. I paste the event that I thought might work but doesnt show a think: Private Sub aButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles aButton.Click
[Code]...
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Feb 5, 2010
[code].....
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Oct 27, 2010
I'd like to partition my search results (which is in a DataTable) into groups of say 100 so the user navigates through them a chunk at a time.I thought I could bind an array of DataRows to a DataGridView as the DataSource but it just does not work. This is the code I tried
DataGridView.DataSource = (From r In DataTable.Rows Skip 200 Take 100).ToArray()
I'd like to stay away using the DataGridView's VirtualMode.
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May 31, 2009
Is it possible to bind a DataGridView to a text file?
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Nov 16, 2009
I am using VB.net 2005 I have a form with a DataGridView on it called "DG"
Here is my Code:Option Explicit On Option Strict On Imports System.ComponentModel
[Code]...
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Jun 17, 2011
My DataGridview already binded to Datatable dt1 DataGridview1.datasource = dt1 and i want to add another Datatable dt2 into datagridview after 20-30 minute and want to keep dt1 as well as in the datagridview ..How i can do that..
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Jul 14, 2011
I have a DataGridView where we select a line and a new form appears so I can change the data.g:
edit.txtQtd1.Text = DGV.CurrentRow.Cells(6).Value.ToString
edit.txtProd1.Text = DGV.CurrentRow.Cells(7).Value.ToString
The data is loaded from that line to textbox's. everything goes fine, but when I edit the
[code].....
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Dec 27, 2010
My problem is that i have two frequently updating DataTables and both of them must be showed in two DataGridView and in .XLS file.
As i understand i cannot make .XLS file without calling New Excel.Application
So i open New Excel.Application, create two datasheets - for each datatable and close application..
For DatagridView i use [code]...
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Jul 21, 2011
i wan to bind data from recordset into data grid view, but the data cannot show in the grid view, i try count the row, there are 2 rows of data, but cannot bind into grid view
If Not rs.EOF Then
DataGridView1.DataSource = rs
DataGridView1.Refresh()[code].....
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Mar 2, 2011
I have a windows application.I am binding datagridview with a dataset which contains values from database.In dataset onecolumn is status.It contains values as 1 or 2 or 3 like wise integers.If value is 1 instead of displaying 1 i want to bind image 1.jpg from Images folder,and instead of displaying 2 i want to bind image 2.jpg likewise.
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Dec 11, 2010
I have the following code:
Dim searcher As New ManagementObjectSearcher("SELECT * FROM Win32_LogicalDisk WHERE DriveType = '3'
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May 26, 2009
I have 2 tables:tblcode and tbltransaction tblCode with 2 fields:Code and Description with data like
Code Description
A test1
B test2
C test3
and tbltransaction with 4 fields:transactionID,UniqueID,Code,Value with data liketransactionID and UniqueID are the primary keys)
transactionID UniqueID Code Value
120 1 A 0
120 1 B 1
I want to write a query that outputs:
transactionID UniqueID test1 test2 test3
120 1 0 1 0
so because tblcode has 3 fields I have 3 columns which are test1, test2 and test3(the descriptions of Code A,B and C) i tried to use pivots but it didn't work for me since I don't know in advance the number of rows in tblcode?
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Feb 24, 2012
I would like to bind different queries for a long set of columns in datagridview that has been set already during the formload, e.g:
With dgvGrid
.Columns(0).Name = "Dept Code"
.Columns(1).Name = "Emp ID"[code]....
there are still more of it. The data needed for those columns is coming from a different table.
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Jan 15, 2012
I created a table in mySql named 'user' where fields are:
UserID,UserFirstName,UserMidName,UserLastName,Username,UserType,AcctPassword,DateCreated, DatLastModified and IsDeleted.
[code].....
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