Adding 2d Array Column Data Together?
Mar 4, 2011
if you could possibly point me to the right direction, that would be great. i have tried researching about this but found no solution.i have a 2d array which holds student name and 3 grades (eng, maths, science.)student array (24,3)Now, i would like to use the data which is held within the array to create averages.I need a total class average for: maths column, eng column, and science. I also need an overall average for all subjects.the code i have used, so far, brings some odd results.
studentarray(i,1) / count
studentarray(i,2) / count
studentarray(i,3) / count
[code].....
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Mar 13, 2010
When I implement this code, the first time the button is activated, the values are placed in the array, and displyed in the list box. However if the user then selects more days and times to add to the list box, and activates the button again, the previously added entries in the array are erased, and only the new entries are displayed. How can I prevent previous entries from being erased? If the user wants to add values, they need to be added to the existing values.[code]
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Nov 22, 2011
I have already binded a data source from Access to my visual basic program but need to add a True/False column to two of the tables. I could do this manually in access and re-bind the sources but that would take up too much of my time so I wanted to know if I'm using the proper code to add a column to the data table directly from VB? Here is the code I want to try but I don't know where to place it?
OleDbCommand = OleDbCommand("ALTER TABLE tableName ADD
FieldName DataType");
(something).Connection = OleDbConnection;
[Code]....
I'm not sure what goes into the "something" parenthesis and where this code must go. I already tried editting through the data designer but although it shows the column in the DataGridView, it does not save any data or the column into the actual access file.
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May 25, 2008
I'm realy new to this VB & Db programming#..I have two tables, one has the Vendor details, the other has all past and current PO details for each Vendor.[code]This needs to be done befere the 'For Each objDataRow In objDataTable.Rows. As the Dataset values will also populate another check Boxlist for 3rd Party.[code]
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Jul 28, 2011
I have a datagridview that is populated from an Oracle 11g DB. What I would like to do is add the values of a column together and display the results in a textbox. What would be the easiest way to do this?
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Apr 25, 2011
What syntax do you use to add decimal data held in a NumericUpDown control, and add it to a one dimensional array? Is there a keyword to sum all the items in the array into one number(For averaging purposes)?
Dim heightarray As String()
ReDim Preserve heightarray(0 To UBound(heightarray) + 1)
heightarray(UBound(heightarray)) = heightNumericUpDown.Value
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Sep 1, 2008
I have an XML file that gets created on form load that just contains:
Code:
<?xml version="1.0" encoding="utf-8"?>
<User />
[code].....
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Jun 8, 2010
This should be an easy one, looks like I got myself too confused.I get a table from a database, data ranges from varchar to int to Null values. Cheap and dirty way of converting this into a tab-delimited file that I already have is this (shrunken to preserve space, ugliness is kept on par with original):
da.Fill(dt)
' da - DataAdapter '
' dt - DataTable '
[code].....
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Sep 25, 2009
I want to create an in-memory object in VB.Net with multiple columns. What I am trying to do is create an index of some data. It will look like:
Row 1: 23 1
Row 2: 5 1
Row 3: 3 38
...
I know I can use a rectangular array to do this, but I want to be able to use indexOf opearations on this object.
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May 28, 2010
I want to add all the values of a certain column. I already get the value of an exact cell value but when i add the loop code for it to continue,it doesn't performs well.
[code...]
I,m using vb6 po with datagrid component.
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Mar 12, 2012
I have a 2d array of data that I have performed the sum of the individual column of the 2d array. I want to send the results to a datagridview and also will like to have the result as a 1d or 2d array.
Below is sample of my code
Dim Array1(,) as double
Array1(0, 0) = 5
Array1(0, 1) = 7
[code].....
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Nov 30, 2010
This is my programs complete code, the only problem is i want to fix the amount of decimal places that show up in my gridview. The problem is if i do this on the asp side the location of the column gets thrown off and the column is duplicated. I figured if i just remade the table on the asp side it would work only problem is if i remove the sql for that particular column the asp side column cannot get data.
Imports System.Data.Sql
Imports System.Data.SqlClient
Imports System.Data
[Code]....
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Jun 29, 2010
My program has an access database with a table called "Contacts". This table stores many values. I have a seperate table that stores surveys. Each contact should have a column for every survey, indicating whether or not the survey has been completed. However, this means I need to add columns to the database while the program is running. I tried the following code, which runs WITHOUT errors, but does not seem to actually add the column.
contactsDataAdapter = New OleDb.OleDbDataAdapter("SELECT * FROM Contacts", frmAdmin.con)
contactsCommandBuilder = New OleDb.OleDbCommandBuilder(contactsDataAdapter)
dtContacts.Clear()
[Code].....
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Mar 18, 2010
I have a gridview which shows selected data from a database all the columns will popup dynamically. but now i want to add an additional column with a list box is it possible or just a column will be fine
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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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Jun 21, 2010
actually i have 3 fields in database which are Sid Fee status what i want to add combo column in field [status] with two option PAID or UNPAID which a user can select and update it .i am all clear with filling the datagridview from database and updating but only problem is adding a combobox in third field that is status.
i tried it with this
Dim combo As DataGridViewComboBoxColumn
DataGridView1.Columns("combo")
[code]....
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Jan 17, 2011
I wanted to add new column to the existing table in my database table Please help.in the form it has a textbox in which you can enter any name that you want you column to bear. all this will be at runtime.i try but it keep saying (format of the intitialization string does not conform to specification starting at index 0) [code]
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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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Jun 25, 2012
I've used the following code, taken from here, to create my own custom column for datagridview, so that I can now have images and text in the same cell:
[Code]...
It works very well, except that the image that I use is right at the edges of the cell. I'd like to give it a small margin. How can I do this?
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Sep 29, 2009
I am assigning a 'ds' dataset to datagrid.In addition to that I want to add new column with check boxes.That new column will be first column of datagrid. Currently I am using below code,
DataGrid1.DataSource = dsResult.Tables("Result")
Result table has 4 column....in addtion to that i want to column "Selection" with check boxes
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Sep 24, 2010
i have a problem about adding up the sum of table in my listview, [code]after i input a value in the textbox1 it will give me the total amount in the listview items. the problem is i cannot sum up the table amount which i will be needing to proceed to another transactions.
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Jan 24, 2011
I am trying to add values from Arraylist to particular column of grid view.
As:
If (Arr_NewContacts.Count > 0) Then
dgvStayout.Rows.Clear() ' **GETTING ERROR HERE**
dgvStayout.Rows.Insert(0, (Arr_NewContacts.Count - 1))
For i As Integer = 0 To Arr_NewContacts.Count - 1
dgvStayout.Rows(i).Cells("Name").Value = Arr_NewContacts(i).ToString
[Code] ......
Datagrid property like AllowUserToAddRows and AllowUserToDeleteRows is already set to true.I am using above code on lost focus event of one of text box.
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Feb 9, 2009
I am using a DataBindingSource to connect a DataTable to a DataGridView. Everything was working fine until I added a ComboBoxColumn
Dim ReasonColumnIndex As Integer = dgvData.Columns("Reason").Index
Dim ReasonCombo As New DataGridViewComboBoxColumn
With ReasonCombo
.Name = "Reason"
.Items.Add("BREAK")
[Code]...
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Apr 10, 2012
I have been trying to modify the data going into a column by adding spacing to the start of the column before the Row ID, using the level to multiply the amount of spaces.Ie. ID is SVG00098 and is a Level 3 Asset, so it requires 6 spaces before the ID.
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Sep 27, 2010
Im trying to add columns to my database through VB.NET. I have a MS Access database (MDB format). It has a table in it called "TestTable" and that table has only one field in it "FirstField". It has no data in it yet. I want to add columns to it first and then fill data.
[Code]...
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Dec 29, 2010
I found this from a Google search and I need the VB.NET equivalent to Martin Liss' code
Dim lngIndex As Long
Dim lngTot As Long
For lngIndex = 1 To lv.ListItems.Count
lngTot = lngTot + lv.ListItems(lngIndex).SubItems(1)
Next
[Code]...
Value of type 'System.Windows.Forms.ListViewItem.ListViewSubItem' can not be converted to 'Integer'Basically, I need to total up a number column in a ListView.
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Nov 15, 2009
I am working on a program where the user inputs values, then the program calculates those values and outputs the sum. When the user hits the button exit then those values entered by the user are saved. When the user starts the program again, the values are still there. I wrote the code and everything works fine. I am saving those values in notepad... and the program grabs the input in notepad and outputs those values to the program. But here comes the problem: Lets say the user wants the information in a certain column to be added to another column somewhere in the program. Is that possible ? And if it is can it be done when I am saving those values in notepad?
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Apr 1, 2009
I just want to ask the following infor from you in relation to gridview... I have 3 Grids,
Grid A
Grid B
Grid C
Grid a has already a data but aside from the data in my grid A I want to add another column for a checkBox. Next, when the checkbox is check and I hit the button "Transfer" the row in the grid in where the additional column checkbox has been check will be transfer to grid B and the remaining data will be move to Grid C?
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Jun 23, 2009
I am trying to add a checkbox column to a DataGridView in a simple window forms application.
I am pulling back some data from a database using ADO.NET, putting into a datatable, and then setting the datagridview datasource to the datatable. I then want to add a checkbox column as the second column. So far I have this code that seems to work:
' Code here to connect to database
Dim da As New SqlDataAdapter(cmd)
Dim dt As New DataTable
[Code].....
This code 'works' and I get MyDataGridView to show the data with the checkbox column in the correct position in the table.
However, for some reason, I cannot check any of the check boxes in the DataGridView? I have tried lots of things (e.g.altering the readonly state of the column) but cannot get it to work.
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Jun 22, 2011
i have a datagridview and in one of the columns i m storing the amount on button click...i want to add the values of the amount at that time only i have done this but it is displaying 0 in the required textbox total += Form1.DataGridView1.Rows(counter - 1).Cells(6).Value
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