Add Calculated Field In Datagridview?

Jun 30, 2009

i have data coming from sql server with two columns like total items, total packed items. Now in datagridview i want to show another column to calculate %age.Total Packed Items / Total Items Is it possible to add calculated column in datagridview?


Getting The DataGridView Calculated Field?

Jul 13, 2011

I have a DataGridView that call a stored procedure.  One of the fields is a calculated field, ie Quantity * Price.When I run the stored proc on the server, the calculated field returns a result that shows 2 decimal places to the right of the decimal point.  When I run the stored proc in the VB application to fill the DGV, the result in the calculated field shows up to 8 places to the right of the decimal place.  Is there a way that it will show only 2 places in the application?

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Sorting Gridview On A Calculated Field?

Apr 15, 2011

I have a gridview that displays a calculated field, based on a db source field it populates with.

can i sort by it? i can't seem to figure out how to do it?


my templatefield looks like this:
<asp:TemplateField HeaderText="Category" SortExpression="category" >
<asp:Label runat="server" Text='<%# BuildCategory(DataBinder.Eval(Container, "DataItem.category")) %>'

where category is party of the datasource, but what gets displayed is a calculated value - which is different from the category.what can i put in the "SOrtExpression" to make it sort by the new value - taht gets displayed?

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DB/Reporting :: Calculated Field In Report Table?

Dec 3, 2008

I have a RDLC report with a list that contains a table. I require a calculated column whose value depends on values from previous rows. Outside of a report I accomplish the same thing using code in a DataGridView's DataBindingComplete method.

From within a report how do I refer to specific cell values from previous rows? embedded code, but I have not had luck (#Error).

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Add A Calculated Count Column To An Existing Datagridview At Runtime?

Aug 4, 2011

in my tableadapter query i have a count function "COUNT(PRIMVENDOR)" to give me the number of rows in each group by:

FROM         ViewCurrentMasterFile


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Datagridview With Bound And Unbound Calculated Columns Won't Display

May 4, 2011

DataGridView1 is bound to a sql table. Cells(0) and (1) come from that table. Cells(2) and (3) are calculated. While debugging the code, the calculations and lookup look fine, but the results will not display in the columns. Here is the code:

Dim SeatsUsed As Integer = 0
For Each r As DataGridViewRow In DataGridView1.Rows


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Add Summary Field With Sum In A Datagridview?

Apr 21, 2010

How to Sum a field annew Summarry Row in datagridview

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Adding Combobox Field To Datagridview?

Sep 9, 2011

Why won't this build and populate my datagridviewcombobox?

Me.POLLINGV2_SCHEDULEDataGridView.DataSource = Me.DataSet1
Dim dgvc As New DataGridViewComboBoxColumn


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Combobox In A Datagridview Single Field?

Apr 24, 2010

I am developing a new project for my daily office use using access database with vb 2005.

In this project I have one bounded datagridview and it is ready to use.

I want to alter a particular field value in the datagridview regularly. so whenever I click the rowheader that particular field should be editable with a combobox with some value, after selection of the value and leaving that particular cell it should be updated with the appropriate record in the database.

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Format IBM Date Field In Datagridview?

Aug 5, 2010

I have a simple VB program that is using the IBM ADO .NET data provider. I've set this up so the data is used by a data adapter and fed with a standard DS. I've manually done the commands to acheive this in code.  I tthen use the DS as the datasource for my datagridview. I'm having one issue and that is with a date field. It uses an "old" IBM date of CYYMMDD, century, month, day date in a numeric field. So my dates look like this for instance in the datagridview:


My question is this, is there any easy way to format them into mm/dd/yy after the DS has been put into datagridview but not yet displayed?

I have done this using the dataread object and can work out a format that way, but I'd have to recode what I already have done.

Some code:

' use the command & connection to fill the data adapter
adpt.SelectCommand = New iDB2Command(cmdText, Db2ConnectOSLD1F3)
' fill the tabel adapter


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IDE :: How To Total Numeric Field In Datagridview

Feb 9, 2010

how can i total numeric field in datagridview

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DataGridView - Double-click A Row Or Column In A Row To Use A Field

Dec 9, 2010

I need to be able to double-click a row or column in a row to use a field (in this case the Student ID field, the 4th column if counting form 0) to get that row from a database onto a separate form and be able to edit and save it. I have no idea how to make this happen since it is not covered in the class beyond basically displaying database data in DataGridView, I chose to use this functionality in my final project (to be fancy I guess) with the thought that it will be easy to accomplish but am finding it is not quite as easy as I thought. My current code is below;


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Extracting Month Value From A Date Field In A Datagridview?

Mar 11, 2010

I'm not sure if this is simple or not, i'm still a student programmer. Basically I have a datagridview that has a date column. I'm wanting to compare the month value from a cell with the current month as an if statement condition. Something like this:

If Me.DataGridView1.Rows(i).Cells(7).Value = currentMonth then
End If

Cells(7) is the date cell i.e. 11/03/2010 (British date format, day, month, year) and currentMonth is, well the current month (03).

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Field In Database Appear To Be Datagridview Header 2010?

Apr 10, 2011

how to make database field as datagridviewheader For example,I have table called subject, and have one column named subjectName. This column will hold all the subjectName, there are more than 100 subject names. E.G

subjectName: math,physics,chemistry,history

Let say a student take those subject, then how to display in datagridview something like this. (field in the subjectName appear to be datagridview header in datagridview)

I want the output something like this

studentName    |math   |physics | chemistry 
| history| etc...  |<-datagridview header
student a         |       


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Made Empty Or Null Field In Datagridview

Nov 15, 2009

I key-in data from textbox to datagridvie..........the date data the format datatable is:


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Calculated Checksum Different Than C# Equivalent?

Feb 23, 2010

This comparison shows the different values of the known good checksum calculation (c#) as used by my client and what I 'hoped' was the equivalent. How can I get 405 rather than 513 as I currently do?

For i = 0 To length - 2 Step 1
cksum += sendFrameData(i + 5)
Next i


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Decimals In Calculated Cell Value?

Oct 1, 2011

i have three cells in a datagridview third cell gives the result of multiplying first and second cell.When i reload or populate this data from datatable into that datagridview value comes like 40.00. with two decimals. For example

       58.00 -------->i need only 58

       58.78--------->i need exact 58.78

The only problem is to remove the decimals if they are 0.

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Forms :: Calculated Column With SQL

Feb 2, 2010

I am attempting to develop a Gradebook that one can use to modify grades and have an average calculated at the end.When you first open the form, you see the database fields in the DataGrid (socSecNumber, firstExam, secondExam, finalExam)I have a button to save the changes made here. The exam grades are null in the database.This seems to work fine, however I have a problem with the calculated column I want to add. I want it to display the socSecNumber and the average for that student. Instead, I get all four fields in addition to the semAverage field. Also, all the grades come up 250 if I fill all the fields in with 100.[code]

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Forms :: Get The Red Color If The Calculated?

May 15, 2010

i have a problem with my program i want to work with 2 color's red and green i want get the red color if the calculated - and green if it is +


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How Are Coordinates Calculated On A Form

Dec 5, 2009

How are coordinates calculated on a form?

Consider the following code:


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Datagridview - .net Load Record Data In A Text Field?

Oct 31, 2011

im fairly new to databases in and i have just learned how to use datagridview. im gonna show some of my code for the connection and datagridview display

Public Class Form1
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String[code].....

i want to display in a textfield the first name based on where is the pointer is positioned after i clicked Button1, how do i do this?

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DB/Reporting :: Select Entire Row When Click On A Field In Datagridview

Apr 23, 2008

This is the only code I could find and it doesnt work:

Private Sub DataGridView1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles DataGridView1.MouseUp
Dim pt = New Point(e.X, e.Y)


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Filtering Rows In DataGridView Based On Date Field

Mar 12, 2010

I have a datagridview and trying to filter recs based on a Date field. This is the
Dim ds As New AOListingDataSet
Dim da As New AOListingDataSetTableAdapters.CallwithNameTableAdapter
Dim dv As New DataView(ds.CallwithName)
dg1.DataSource = dv
[Code] .....

It works ok when filter is on other fields but brings empty on 'CallDate' date field. I have declared the 'CallDate' field in db as long date format in Access.

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Forms :: Importing 5 X 1000 Data Field Into DataGridView

Nov 29, 2010

I am trying to make part of a form program do the following When I exit a text field, I want to import some datainto a datagridview control.The columns are (1)Key, (2)Location, (3)Part Number, (4)Serial Number, (5)Description.There are up to 1000 rows of data in anyone of the spreadsheets I am working from.By using a datagridview, I can click the header and sort the data by either of the 5 columns, and when I select a data row, the Key number is reported back (for now, into a text box)I will be using the key number to further manipulate the spreadsheet after I have solved this problem.There are thousands of articles on DataGridView, and over the past 8 days, I think I have read them all. I have tried many downloadable routines, which haven't populated the DataGridView at all.Please can someone show me a simple program which will do the above task, and will give me a base to start from.I am running MS Office Pro plus 64-bit on Windows 7 and Visual studio 2010 pro

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Update An Access Database Field Using Vb By Clicking On A Datagridview Row?

Oct 11, 2010

Update an access database field using vb by clicking on a datagridview row?

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C# - How A Month Is Calculated In The Rest Of The World

Jan 11, 2012

I'm just curious that how a month is calculated in the rest of the world because Differences in Months between two dates are calculated differently. In our Insurance Company, we calculate a month as below:


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Datagrid With Calculated Fields Error

Dec 27, 2009

I have a DataGrid as a child of a Customer Form based on a Query like this


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Group By And Aggregate On A Calculated Column

Feb 20, 2011

how to change this Linq to Entities (VB.Net) query to Group by L2_ID column and aggregate the calculated column diff as Sum for the group.


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Store Calculated Values Into An Array?

Mar 8, 2011

I am attempting to teach myself visual basic and I cannot figure out how to send a calculated value (on a button click) into a one-dimension array and then recall the last five values in a message box when the user exits.

Here's what I have:

Public Class frmInvoiceTotal
Dim totals(4) As Decimal
Private Sub btnCalculate_Click(ByVal sender As System.Object,


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VS 2010 Calculated Fields In A Datagrid?

Feb 17, 2011

My program is databound to an access 2007 database. I have a datagridview showing rows as part of my screen and the other part of my screen is texboxes bound to a different table.What I currently have:

1. Date in textbox from one table

2. Age in Datagridview column from another table

I need help with having a calculated date column in the datagridview that will be the textbox date + age (in days) in the datagrid column. I would also need this column to store in my database like any other field also. So if I typed in 2/17/11 into the textbox, and I typed in 2 in the age field, the calculated field would display and store 2/19/2011 in my datagrid and database. My dataset designer won't let me add a date to a string so I'm completely lost. A query calculates it easy in access but when I load the access query in my dataset it doesn't calculate anymore.

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Forms :: Date Field - Exporting A Datagridview To A Text File

Dec 18, 2009

I am exporting a datagridview to a text file. The code to do this is: Public Sub WriteTextFile(ByVal dgv As DataGridView, ByVal varlbl As String)


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VS 2005 Time Field When Exporting DataGridView Data To Excel?

Oct 6, 2009

I have a DataGridView that I'm loading into Excel through the use of an ADODB.Recordset. It works fine, except for a column I have that displays the time. Not the current time, but the time when a file was sent. It displays correctly in the DataGridView but displays 12:00 AM for every row in excel. I'm adding it to the DataGridView like this:

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Calculated Value On TextChanged Event Can't Be Updated To Database

Jan 14, 2010

I have invoice form bound to a bindingsource and bindingnavigator. In the form I have unit price, quantity and total textboxes. The total textbox text property is set to total.text = quantity.text * unitprice.text in the textChanged event of both quantity and unitprice text boxes. The result is displayed in the total textbox. But when i hit save button on the bindingnavigator it is set to null and not saved to database. [code]When I used msgbox to see the value of total textbox before bindingsource.endEdit() it is the correct value. but after the code bindingsource.endEdit() it is null. I checked the databinding property and it is correct. What is the problem.

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Cannot Get Listbox To Display Calculated Values For Each Integer Along Way

Mar 22, 2011

I am working with a future value application and I am trying to display the calculated future values in a listbox.  For instance, I input the monthly investment, the yearly interest rate and the number of years into textboxes and I want the application to list out the future value for each year until the number of years in which I entered is reached. I cannot figure out how to get the code to display the value after each year.  I am trying to use the "mod" operator to display the value each time the 12th month comes around.[code]...

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Plot A Graph From Values Calculated From A Database?

Apr 19, 2011

ive been struggling on this portion of my code for almost 3 days with no luck. i have a database containing a list of transactions (in this case, the product name, quantity and date of sale). I want to plot a graph for each product showing the amount sold each month for the past 12 months. The functions to calculate these values are working fine. but my problem is this:

each tab page is named after the product name:

& ProductName, Item)

and then to this tab page i want to add the graph. but i cannot reference the newly created tab page?

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Debug Calculated Function Returns Without A Return Variable?

Jul 13, 2010

It's often the case that I can write a nice tight little VB.NET function, and when it comes time to do the Return statement, it's really natural to just return the result of a quick calculation or a method call. However, this makes it difficult if I need to step through the debugger to see what is going to be returned from that Function. For example, take this simple method to illustrate the concept[code]...

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Display Calculated Results Of Textbox Values Into Summary?

Apr 3, 2012

I'm trying to learn vb .net. Below is my code, and all I want to do is display the calculated results in a summary. Whether it be a message box or a different form it really doesn't matter.

Public Class Form1
'Global Declarations.
Const STEREOSYSTEM_Decimal As Decimal = 425.76D
Const LEATHERINTIERIOR_Decimal As Decimal = 987.41D
Const COMPUTERNAVIGATION_Decimal As Decimal = 1741.23D
[Code] .....

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Linq-to-Entities Aggregate A Column That Is Calculated In An External Function?

Feb 21, 2011

I want to Sum of the calculated column Red which is calculated in the Function IsRed() that return an integer.When I run the query I get the following error: Method 'Int32 IsRed(Int32)' has no supported translation to SQL.How should I rewrite this to get it to work.


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VS 2010 OleDB Updating Multiple Records With Calculated Values

May 23, 2012

I'm writing a time entry program to record when an employee checks in and when they check out.I'm struggling on the part where I need to calculate a time span (time out / time in). I am selecting the In Time, Out Time, and Total columns.I want it to take the Out Time subtract it from the In Time and place that value in the Total column.I have so far and have tried several variations of different updates but have had no luck.[code]I keep getting a syntax error in the UPDATE statment.I'm not very fluent with OleDB yet and I'm not sure if I'm doing the update correctly.I have no problem with OleDB and single UPDATES or single field updates but when I am updating multiple rows with different values.

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Check If A Field In A Data Table Is Null Before Creating A Textbox Bound To That Field?

Feb 24, 2010

I am building a data based application using VB 2008 an SQL Express. I need to create textboxes on my form using code, (With & End With) method. I need a simple code string that will allow the app to check if the field to wich the textbox wil be databound is Nul, If so the textbox will not be created.

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