Data Binding - Update The Grid Data By Reading The Array
Apr 2, 2012
Data binding should be an extremely simple thing to manage but I can't find a SIMPLE solution to the following problem.
I have two forms
Form1 contains a 4x4 MSFlexGrid (unfortunately an unmanaged COM object but I can merge cells, which I can't do with a managed Datagrid)
Form2 contains other controls which change the data in the Flexgrid.
I connect the two with a Public 4x4 array. Form2 changes the data in this array. I can update the grid data by reading the array. But how do I bind the Grid to the array so that it auto-updates - which is the whole point of binding isn't it?
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Oct 6, 2011
how to display data in grid view using code that you can edit, update and delete the data...do i need to have a stored proc in this?
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Jul 27, 2010
anybody recommend a 3rd party DataGrid control similar to the MS DataGridView.I would like something that can handle null vales without throwing Object reference errors. Decent hosted controls support (for things like Type-In Combo Boxes, date time picker) Similar Data Binding options as the MS Grid and something that will look like a normal grid and mix well with the standard MS Controls.
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Jul 15, 2009
wan to ask about anyone know the code about how to clear all the data inside the data grid view without clear the binding source...
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Apr 15, 2011
I'm looking to see if anyone has a sample app or has a link to such an app that uses data binding with a grid control and textboxes and is able to insert, change and delete from a datatable which gets updated to a sql server database.I have done an app that has the grid control and the textboxes already and is able to change and delete from the datatable and that action is reflected in the grid control because it has the datatable as the binding source.
The problem I'm having is when the user tries to insert into the datatable I get a concurrency violation error when using the .Update statement to save the changes to the database. This is happening because I don't know exactly how to get those inserts synchronised correcly.I'm sure I'm also doing the processing wrong but here is what I'm doing.When the user clicks an insert button I insert a new row into the datatable. The user now has the ability to enter text into the textboxes. When the user is finished doing that the user can click the save button which issues a .Update statement. That's where the error is displayed
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May 30, 2009
i'm populating data grid view on the basis of some query string, on runtime, but the problem is that i'm unable to edit the contents of it. i've check the Enable Editing in its tasks panel. I don't want the user to add or delete any record so i've uncheck both of them. this is the code i'musing to update the DGV on runtime, can anyone of you modify this code so that editing can be done.
sqlStr = "SELECT * FROM tblSales WHERE Receipt_Number = " & txtInvoiceNo.Text
Dim dt As New DataTable()
Dim dataAdapter As New OleDb.OleDbDataAdapter(sqlStr, conStr)
[code]......
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Oct 20, 2010
I'm getting some problems to read a text file with this configuration:
[Code]....
I want to put all 3 lines in a data grid view.
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Mar 16, 2011
I'm trying to create a Library System in VB 2010 which is connected to a 2007 MS Access Database manually. I was successful to create a "Search" button where it displays content from the database based on the user's entries on several text boxes.
The result is shown on a Data Grid which I set to allow Editing on it. My problem now is I can't find a way to create an "Edit" button. My idea is basically allow the user to search, let the result be shown on the data grid, edit the data grid, and click the Edit button to save the updated records back to the database.
My question is it possible to create such button? Here is the code that I use to connect to the data base for the Search button.
[CODE...]
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Jun 1, 2011
i have connected my SQL SERVER 2005 database to vb.net and program is capable to show the database in the data grid view. but what i want is when i change the data in the data grid view and click onto update button,changes i made should be saved in database so when i execute the application again i should be able to see the updated database in the data grid view.
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Sep 9, 2010
I want to reading in a excel file and extract the sCodenumber sDescription ans the sStatus and store them in a array : StatusComposeArray(5200) As MyCompose. After this I need this array for comparing outside this class. But as can you see the array is defined inside the sub: ReadingIn_ExcelFilesCompose [Code]
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Apr 21, 2010
I have a huge array, well Data Grid actually (unbound), but it can be populated into an array... 47 columns by 2000 rows. The data within is random, I need to check each row for duplicates...
essence is on the quickest method though as it will be called by the user. The data is populated by column, so I can not check for duplicates during population.
e.g.
DataFR1, DataBF2, DataJU3....... DataXN47
DataHY1, DataBF2, DataJU3....... DataXN47
DataFR1, DataBF2, DataJU3....... DataXN47 << This is a duplicate >>
I can perform the 'compare' but i'm struggling with the speed.. because row 2000 could be the same as row 1 I can only get my head around a solution that would be very slow
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Jun 10, 2011
im having trouble reading in lines of data using arrays and a structure. I believe my main problem is figuring out how to keep track of the lines read in, even if the whole array size isnt used up. Also, To break up each line I am trying to use the split function to seperate spaces, but dont know if im doing so correctly.[code]
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Jul 23, 2009
I have a program that is reading and writing to certain memory addresses to a particular application exe...
So I have a listview control with 4 columns and X rows
| Name | Address | Type | Value |
Name: Is just an identifier so the user knows what it is.Address: Is a specific memory address (eg 0058AFA0).Type: Type of value stored in the address (eg, 4 Bytes, Float).Value: Value to store in the address.Im looking for a way to go through each row, take the address and use this to read the value at that address and then update the value on that row
[Code]...
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May 15, 2012
I�m currently working on a school project and I have encountered a problem in my code. When i write the contents of my listbox to a file called stock.txt it seems write an invisible linebreak in-between each data entry, my problem is that when I load my array on the next form those invisible linebreaks causes my array to load the data incorrectly.
I have attached a pic of my stock.txt file
The Code that Edits and writes to stock.txt
Private Sub BtnRemove_Click(sender As System.Object, e As System.EventArgs) Handles BtnRemove.Click
'Removes the selected item from the listbox then updates stock.txt
lbxStock.Items.Remove(lbxStock.Text)[code].....
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Jan 8, 2012
Is there a way to automatically put a Data Grid Row Column in a data Grid?[code]...
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Dec 27, 2010
how to code for the save button in vb.net datagrid view by using insert into sql and update sql statements (it should be able to insert & update the data grid and save the changes) when the save button is clicked .
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Mar 10, 2010
I have a problem with importing an excel into a data grid.
Here is my code:
Try
Dim _Obj As New ExcelConnection.ExcelConnection
_Obj.ImportAttendence("c:Info_pc.xls", DataGrid1)
Catch ex As Exception
End Try
In the excel i have numers and text and "Service Pack", "Processor Speed" and "Numar procesoare(Number of processors)" and the values for these are numers. in the data grid when i import the excel those values doesn't appear, i receive the value "null".
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Apr 23, 2010
how to use the VS 2010 IDE tools in a way the Microsofties didn't specifically intend. But since this is something I immediately tried without success.
I have defined a .NET 4.0 WPF Application project with a simple class that looks like this:
Public Class Class1
Public Property One As String = "OneString"
Public Property Two As String = "TwoString"
[Code]....
The expected result was that "OneString" would appear next to "One" and "TwoString" next to "Two" in the running window.
The question is: Why didn't this work? What will work instead? If I put bindings in a DataTemplate, it works. Blend, with its sample data stuff, implied that this should work, but it doesn't.
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Jun 3, 2011
i hve create combobox & text box and add database source to my project...i know how to binding data or load data to combobox using SELECT query..but can i change SELECT to INSERT query cz i wont when i type data into textbox,data will be in database...second..can i binding without add database to project..i mean mydatabase in debug folder..i hve problem binding data if database is not in myproject..
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Jul 31, 2010
I have a listbox in my form that gets its values from a data table by data binding. My question is, when the data (row) is loaded it also selects the first line automatically. I do not want this because I want the listbox to select an item only when the user clicks on it. Otherwise, the iteme should ony be listed. Is there a way to manage this?
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Oct 14, 2010
I just want to display data in a DataGridView (from SQL - already made the connection) based on what is selected in a ComboBox (data that is also coming from SQL). The 2 are separete on the form. I am using VB 2010.
This doesn't work for me:
objCommand2.CommandText = "SELECT ProductID, Name, Color, Size, ListPrice FROM SalesLT.Product WHERE ProductCategoryID = " & cbCategory.SelectedValue
[code].....
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Nov 11, 2010
The control comes up blank??Imports System.Data Imports System.Data.OleDb Public Class Form1
[Code]...
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May 18, 2010
I'm trying to create a simple Data Grid that will automatically save changes. So far I have a data grid connected to a MS Access 2007 Database that reads the data. I can create new fields in the Data Grid, but I need to program to save the data automatically to the database on update (or on close).
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Sep 28, 2011
I have an excel file that I would like to load into my form and display there.
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May 15, 2011
Are there any good free alternatives to DevExpress data grids (WinForms)?I am looking for WinForms Data Grid and Data Editor Controls.
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Apr 24, 2012
I am trying to pass a different template to a Telerik Grid, depending on if the add button or the edit button is pressed (on creation: a few field to fill. on existing: add button : some extra fields to fill, edit button : most field are read-only, new field to fill).
Dim myGrid = Html.Telerik().Grid(Of SomeModel) _
.Name("myGrid")
If Model.Action = AddNewData Then
myGrid.Editable(Sub(editing) _
[code]....
I have no idea on how to do the if "gridBoutonPushed = Add" then part.
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Jul 20, 2009
I have a datagridview which have 5 columns. The name of the columns are T,C,F,S,H. [cod]e...
So i want to display this data in datagried view. I must display the number beside T to T column, the number beside C to C column and so on. It should only display number in the respective column. It should not display the T,C and so on. [code]...
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Feb 15, 2012
i have a form which search data in specific date and show result in the datagridview, what i want is that when delete button is clicked all datas that in the datagridview will be deleted sameway in the database
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Mar 21, 2010
can data reader be used as a data source for a grid control?
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Oct 31, 2010
i want to binding excel data to a datagrid without no header, just the data.for example :my excel files consist of 3x3 matriks data in 3x3 excel cell like this
1 2 3
4 5 6
7 8 9
and i want to show all this data on data grid i have tried with some code like this
Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
Dim ds As New DataSet
MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0; " & _
[code]....
but the first row of that data ( 1 2 3 ) is not shown up in the datagrid, just the 2nd and the 3rd row that shown up in datagrid?
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