Counting The Duplicate Rows In Datagridview?

Feb 16, 2012

I have a datagridview with rows and 2 columns the first for staffname the second for the price the first column name is "staff" the second is "price" I want code count's how many time the row have been repeated to count the item price

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VS 2005 Counting Non-new Rows In Datagridview?

May 11, 2009

how do I count all non-new rows in a datagridview?

datagridview always give a blank row at the last row, and when i do a rows.count, it always adds up

is there a way to count only non new rows, or do i just need to subtract 1 every count (which is weird)

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Datagridview Remove Duplicate Rows

Apr 8, 2010

My browser application has an option to display all the "href" elements of a web page in a datagridview.

I use the code below to populate the datagridview.[code]...

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VS 2008 Finding Duplicate Rows In A DataGridView?

Aug 26, 2010

If I have an unbound DGV with hundreds or thousands of rows what is the easiest way to find any or all duplicate rows? ie. where the data in all the columns is the same in 2 or more rows.

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VS 2010 Delete The Duplicate Rows In A Datagridview In Vb 2010?

Apr 26, 2012

I have a datagridview extracted from a csv file. It displays duplicate rows. How can I delete those duplicate rows from the datagridview? replies would be precious.

[Code]...

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Counting Rows After Filtering?

Sep 23, 2009

I would like to count records of a datagridview after having applied a search criteria
the code i am using is the following:

Private Sub count_btn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles count_btn.Click

[code].....

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Counting Rows Between Dates?

Oct 30, 2009

Compute("COUNT([SoldDate])", "[SoldDate] >= #" & DateTime.Today.ToString() & ateTime.Today.AddDays(180).ToString & "#") get the following error:
tring was not recognized as a valid DateTime.

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Counting The Rows Of Listview?

Mar 5, 2012

I have this search form and I want to count the rowsThis is the code for the textbox wherein I type te names.

Public Sub showitems2()
Dim com As OleDbCommand
Dim oledbda As OleDbDataAdapter

[code].....

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Application - Counting Rows In Excel

Jan 15, 2012

I have an application that needs to know how many excel rows are in a worksheet before they are imported into my application.

At the moment I am asking the end user to enter this into a text box, but would like my application to do this can anyone suggest the best way to do this?

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Counting The Number Of Rows In A Database?

Apr 30, 2009

I am using a tableadapter to connect my project to an MS database. I need a a function which counts the number of rows in the table for something which I am doing. I have sucessfully used the count function to count the number of rows for my other tables, but when I tried to reuse it for another table, it wouldn't work. I get an error...

An unhandled exception of type 'System.ArgumentException' occurred in System.Data.dllAdditional information: Input string was not in a correct format.Couldn't store <AH25> in ProductCode Column. Expected type is Int32.

and this is the code which I used

Dim record As Integer = TAProduct.GetData.Rows
Do Until record = TAProduct.GetData().Count
' other codes
loop

It only seems to work if the first column is an integer datatype, which is the case for my other tables, but the table which I am currently dealing with using a string datatype. Is there another way to count the number of rows without using SQL statements or can I adapt my existing code in some way?

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Counting Total Rows On A Datagrid

May 10, 2011

I am trying to count all the rows on a datagrid after it has been populated from my DB. I have searched online on how to do this but nothing seems to work.[code]where test is my datasource it gets thrown into

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VS 2010 - Datagridview - Rows Cannot Be Programmatically Added To DataGridView's Rows Collection When Control Is Data-bound

Sep 13, 2011

I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."

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Counting Rows / Columns In Excel Worksheet Using VB 2008

Mar 16, 2012

This is my first time posting in a forum like this, so please excuse me if I accidentally break any thread rules (btw, where can i find these?). I am very new to Visual Basic and have been trying to teach myself as I create this program. I have experience with macros in excel so I do understand some of the coding, but definitely nowhere near being proficient. I am using Visual Basic 2008 Step by Step (Michael Halvorson) to teach myself.

I am trying to create some code in my program that will allow the user to open an excel file and then return the number of rows and columns in the worksheet. There will only be 1 worksheet in the workbook (since this is just a small part of a larger program I am writing). I already tested the code that will open the file in another program and it worked fine; the thing that is catching me is the row and column counts. I'm a bit stuck here and was hoping someone could point me in the right direction. Here is the code as follows: Code: I have another sub for a quit button which I chose to leave out. The last line for the MessageBox is causing me problems.

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[2008] Duplicate Rows In DataDridView?

May 26, 2008

I am looping through a file and I am populating a datagridview with values. I have this part done, and it works just fine. My problem comes in when I try to remove duplicate rows from the DataGridView. I would like the code to increment a cell if a duplicate row is found and then remove the duplicate cell. For instance if the program comes across 2 instances of "duplicated value" in the DateGridView, I would like the second instance to be removed and then a value of 1 added to the first instances row, 4th column. I understand most of it, but I just can't get the darn loop(s) working correctly. Iguess my theory is to compare the first row to the last row. if there is a duplicate, then remove the duplicate and add "1".Then I should move onto the next item from the top. This would loop until all items have been checked. I have been messing with this for a while now and I just keeps getting worse.

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim col, row, MaxCount, x, y As Integer

[code]....

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LINQ To DataTable, Finding Duplicate Rows?

Jul 5, 2011

Using the following DataTable:

Dim d As New DataTable()
d.Columns.Add("Product", GetType(System.String))
d.Columns.Add("Value", GetType(System.Double))

[code]....

I'm trying to use LINQ to identify if there are more than one of any type of product. In SQL, this would work something like:

SELECT Product FROM SOME_TABLE HAVING COUNT(*) > 1

I can't for the life of me work out how to do this in LINQ. I was following someone who did something like this:

Dim q = From row In d.AsEnumerable()
Group row By New { column1 = row("Product"), column2 = row("Value") }
Into grp

[code]....

But I get an error when I try to actually use 'q'. how I can make this work?

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Removing Duplicate Rows In A Textfile Then Add To Datatable?

Aug 16, 2010

I am reading a textfile and extracting information from each line. For example string1 and string2. I am then writing these string to a datatable.

However, sometimes there will be repeats in string1 and string2.

If there are repeated lines I would like to be able to delete the repeating line and add a counter to find the total number of repeating lines.

so if a string repeates 3 times I would like there to be a column with a 3 displayed next to the line in my datatable.

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VS 2010 ListView - How To Avoid Duplicate Rows

Sep 22, 2009

I am populating the list view using mysql and i dont know how to avoid duplicate rows.
Private Sub Btnrefresh_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnrefresh.Click
Using connection As New MySqlConnection(";")
Using command As New MySqlCommand("SELECT Distinct name, type, uploaded, uploader, location FROM programs", connection)
connection.Open()
[Code] .....

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Delete Subsequent Duplicate Rows In A Text File

Jun 30, 2010

I'm going nuts with this. Obviously I cannot open the reader ard writer on the same file simultaneously.

[Code]...

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Counting Boolean Values In DataGridView

Dec 7, 2011

In my DataGridView, I have several columns with check boxes that indicate whether the part has been bought or not. I want to add the summation of each column though to know how many of each parts have been bought by a single company. I have the count code working partially but I cannot get the correct number at all. Here is the code:

[Code]...

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VS 2008 (DataGridView) :: Delete Successful Inserts Of Rows And Move Rows Up?

Jul 30, 2010

How would i delete only the successful inserted rows for insert and then move the non successful rows up and allow the user to correct the data and get it ready for an insert. If i dont delete the successful rows then i will have multiple inserts of the same dataRow and we dont want that! AND if i dont move the data up then it will have blank rows uptop and will end the try and not insert the corrected data. You can better see what logic i am trying to perform at the bottom of my code, right after I insert into the database. Here is my code.

Private Sub btnLaserGenerateTicket_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLaserGenerateTicket.Click
'Function declarations

[code]....

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.net (DataGridView) - Delete Successful Inserts Of Rows And Move Rows Up?

Jul 30, 2010

How would i delete only the successful inserted rows for insert and then move the non successful rows up and allow the user to correct the data and get it ready for an insert. If i dont delete the successful rows then i will have multiple inserts of the same dataRow and we dont want that! :) AND if i dont move the data up then it will have blank rows uptop and will end the try and not insert the corrected data. Here is my code.

[Code]...

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Error - Rows Cannot Be Programmatically Added To The DataGridView's Rows

Feb 7, 2012

'Invoice Form
Dim daInvoice As New OleDbDataAdapter()
Dim dsInvoice As New DataSet()
Dim MyDataTable As DataTable

[code]...

Error...

Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound.

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Rows Cannot Be Programmatically Added To The DataGridView's Rows Collection

Sep 2, 2010

how to add Rows programmatically to the DataGridView's rows collection when the control is data-bound? here is my code but i got error as "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound? "

[Code]...

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VS 2010 - "Rows Cannot Be Programmatically Added To The DataGridView's Rows Collection When The Control Is Data-bound"

Sep 1, 2011

Can anyone tell me why "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound." I keep getting an error "Invalid Operation Exception was Unhandled" error. All I am attempting to do is allow the user to select products from a list(or a second datagridview) and have it added to the datagridview so they do not have to type in every cell since the other cells are not visible because they do not purtain to their needs. Plus they will be able to save all items at the same time.

[Code]...

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Save Datagridview Rows As New Rows?

Apr 26, 2012

It was even difficult coming up with a Question title for this.

Am not sure whether am using the right approach to my problem. See i have this datagridview that contains rows that i would like have saved back into the Database as new rows but with a column altered to a new value.

Eg

PKColumn1 FKColumn2
Column3 Column4
1 1

[Code].....

What am looking at is Change FKColumn2 (some foreign key, maybe i can also have a combo box somewhere on the form and an "import to") values to something like 2 and save the rows back to the database without loosing the original rows.

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Deleting Duplicate Row In DataGridView Error

Feb 19, 2011

I am trying to delete a row if the program finds a duplicate entry.

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Duplicate A DataGridView On A Second Windows Form?

Apr 3, 2011

I have a bound DGV that took a bit of work to get its columns set up. I'd like to show a 1-row version of this identical DGV on a second windows form. Is there a way to programatically place a copy on the second form. I would adjust the height and position of the 1-row version, and create a new binding source on the second form so that I could filter the data.

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VS 2008 Datagridview Duplicate Data?

Nov 8, 2011

In my winform, i m using a datagridview.. I m also allowing to enter data through it. User has to select a product and put in price for it. for products column i have used combo box and for rate column i have used text box.I want that once user has selected a product, he is not allowed to select the same product for other rows... I mean duplicate product selection not allowed... how do I prevent it..

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DB/Reporting :: Duplicate Existing Record - Datagridview

Sep 3, 2009

I have a simple database with our customers data. I'm using access database, dataset, and a datagridview. So when I selected a row, I want to make a new row with datas from selected row. Here is my code:

[Code]...

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Forms :: Prevent Duplicate RECORDS Datagridview?

Feb 7, 2009

how to prevent duplicate RECORDS in datagridview cell vb.net

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