Avoid Duplicate Values In Datagride View?

Nov 7, 2010

How can I avoid Duplicate values in Datagrideview. When I am putting Product Id in Invoice which is adding in datagrideview if it is exist in datagrideview it will Highlight with deferent color and give me massage that this Id is existent in datagrideview

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Avoid The Duplicate Values In The DataBase?

Jan 29, 2011

How can i avoid the duplicate values in the Access Database?? I am working in VB.NET, to create DataEntry Form. I have Combobox. When enter the value on Combobox and press OK button then the value should check on the database , if the value is not there then it should save on the db. else the Missage will give "It is Saved".

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Populate Excel From Datagride View?

Jul 30, 2011

I populat an excel file from a spread sheet, but I get an error everytime I open the Excel File. I was wondering if someone could point out my mistake in the code.

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
'FILL LOCATION AND NAME

[Code].....

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Change Font In Datagride View Combobox Popup List?

Aug 12, 2011

change font in datagride view combobox popup list?

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Avoid Duplicate Value In Datgrideview?

Nov 11, 2010

How can I Avoid Duplicate values In datagrideview. IF found dublicate values in will change the row backcolour and show me the rows.

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Avoid Duplicate Listview Groups?

Nov 25, 2010

on button.click event,Dim category As New ListViewGroup(cbType.Text) If Listview.Groups.Contains(category) Then Arggh! this should work. Listview.Items.Add(lvi).Group = category

Else
Listview.Groups.Add(category)
Listview.Items.Add(lvi).Group = category
End If

If cbType.Text was "Dog", it will add another "dog" group header every time I add an item having selected dog, when I want to add the item to the existing dog group.

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Avoid Duplicate Records Because Of Timer?

Nov 10, 2011

I'm currently using a timer to check for the time of midnight.At midnight each day I have to add a bunch of records into a database.My windows form program will be POSSIBLY running on multiple computers at midnight, meaning I may get duplicate records, because each running program will detect midnight at the same time and add the records accordenly.

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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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String Search Listbox Entries To Avoid Duplicate Entries In VB 2008?

Nov 29, 2009

I have a program where you have three entries, CD name, artist, price and it goes into a listbox and .txt file when closing. I have to have a message box if you enter the same CD name. I have a code to open the .txt file and compare strings but I need to change it to compare only the CD name and not all three entries. Is there a way to do my string compare against my listbox without opening the .txt file?? The program loads the listbox from the .txt file when opening. Private Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click' adds CD information to the list box

' declare variables
Dim strName As String
Dim strArtist As String
Dim strPrice As String

[code].....

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View / Display Duplicate Records From Lab

Oct 13, 2010

I have a whole bunch of duplicate records in my table. Using select Statement I want to display those records. the table name is Labs1 The 3 columns are:

[Code]...

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Duplicate Values In A Datagrid?

Feb 26, 2012

I'm using an unbound data grid in Visual Basic. I made the following loop for the purpose of searching each cell and each column for a duplicate value. But for some reason I get a "InvalidCastException" when I try to add a second row.

Private Sub AddJudgeBtn_Click(sender As System.Object, e As System.EventArgs) Handles AddJudgeBtn.Click
Dim exists As Boolean
' ToDo: If the value entered is already on the list, don't add again.
If JudgeList.Rows.Count() > 0 Then

[code]...

EDIT: Adding the entire click event.

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Get Duplicate Values From Dgv Into A Combo?

Dec 14, 2011

I am trying to get duplicate values from dgv into a combo:

[Code]...

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.net - Linq OrderBy On Duplicate Values?

Oct 20, 2011

m_ListOfsAllFields.OrderBy(Function(x) x.DisplayOrder)

here I have DisplayOrder = 0 for 2 fields, so orderby is messing up and not ordering properly. How can I use orderby to order this collection?

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Avoiding Duplicate Values In Database?

Jun 21, 2010

I want to insert number for City_Id and City_name , i wrote a query for auto generate number for City_Id,working fine but in the city name i want to avoid inserting duplicate value like if Mumbai is a City ihave already saved then system should not allow that name again. neither in small or in capital or mixed letter.

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Checking For Duplicate Values In Strings?

Aug 5, 2009

am new to VB.NET and i was wondering if anyone here knows how to check for duplicate values in strings?

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DataGrid Validation For Duplicate Values

Dec 15, 2011

I need to validate a particular coloumn in datagrid for duplicate values before inserting into database. I am using datatable.

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Random Numbers With Duplicate Values

Mar 9, 2010

Get Random value with no duplicate

[Code]...

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[2005] Drop Down Duplicate Values?

Jan 20, 2009

I have a fairly large Drop down menu:

<asp:DropDownList ID="DropDownList8" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList8_SelectedIndexChanged">
<asp:ListItem Value="" Selected="True"></asp:ListItem>

[code]......

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Checking For Duplicate Values Before Attempting Insert?

Apr 14, 2011

I have a form where two fields on the first page of the form make up the primary key. I want to check for duplicate values before attempting to insert the record, since I don't want the user to go all the way through the form only to find out they can't submit it. So I'm trying to check for duplicate values when the user tries to go to the next page of the form. I wasn't quite sure how to do it, and sure enough I'm getting an error. ("Object reference not set to an instance of an object.") The problem is apparently in my if statement, "If myValue.Length > 0 Then", but I'm not sure what needs to be in place of that.

Protected Sub CustomValidator1_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles CustomValidator1.ServerValidate
'get values

[code].....

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Delete Excel Columns And Duplicate Values

Jul 5, 2011

I am trying to create a .Net application to edit a excel file by deleting some columns and keeping the columns which we need and then removing the duplicate values based on the first column which is going to be the Serial no. which should have a check to have 6 digits by default like 2563 should be displayed as 002563.

Code:
Public Function GetAllFileContents(ByVal path As String, ByRef errorMessage As String) As IList(Of String)
Dim contents = New List(Of String)
Try
Dim files = Directory.GetFiles(path, "*.xls")
If (files.Length = 0) Then errorMessage = "Please select the files"
For Each file In files
[Code] .....

I am trying to create something different by not only letting me do it for excel files but for say txt and csv files along with it. Removing all the values which I dont want and removing the duplicates and then if possible putting a check on the first column of data that the serial number number should have minimum of 6 characters and then The output file should have all the details in Uppercase

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Prevent Duplicate Values Entered By User?

Feb 10, 2012

How do I prevent users from a inserting a duplicate value using SQL Query

datatype is VarChar(50)

e.g. the name field has already been defined as "Josh", I don't want it to be able to add another "Josh"

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Enter The Duplicate Values.In The Database One Of The Column Is Indexed?

Feb 4, 2011

I am sending values from Combobox and Textbox to Access Database in VB.NET.I am phasing the problem when i enter the Duplicate values.In the database one of the column is Indexed.(Yes Duplicates not allow)That column i bind to Textbox("txtperson1").I used the TRY and Catche method to solve the Indexed Problem.when i run the application the value which i enter is not a duplicate that value save on the db. Once i enter the Duplicate value , the message box is showing "The Record alread saved".But After i enter the new value the same message is displaying, it is not saving on the db.

[Code]...

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VS 2008 Updating Database - Producing Duplicate Values

Jul 29, 2009

Here is my
cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=BHgardeners11.mdb;")
cn.Open()
Try
str = "UPDATE Products SET ProductCode = ?, ProductManufacturerCode = ?, ProductsTitle = ?,
[Code] .....

If there is only one item in the database, then this code works. If there is more than one record then the error is produced that it is trying to produce duplicate values. This is down to the Primary key in my database which is the only thing that cannot have duplicate values. However, when I remove the primary key it has the predictable problem that it goes crazy and does weird things.

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Error - Create Duplicate Values In The Index - Primary Key Or Relationship

Apr 4, 2011

I had restart my program for 5 times, and i still can get through it. the due date just around the corner.

"The changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again."

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LINQ - Create SubList And Skip Items With Duplicate Property Values

Apr 4, 2012

The problem is: I have a list of objects, with some containing the same PlanId property value. I want to only grab the first occurrence of those and ignore the next object with that PlanId. The root problem is a View in the database, but it's tied in everywhere and I don't know if changing it will break a ton of stuff nearing a deadline.

So, if I have a list of PlanObjects like such.
Plan1.PlanId = 1
Plan2.PlanId = 1
Plan3.PlanId = 2
Plan4.PlanId = 3
Plan5.PlanId = 4
Plan6.PlanId = 4

I want to take a sub-list from that with LINQ (italics mean an item is not included)
Plan1.PlanId = 1
Plan2.PlanId = 1
Plan3.PlanId = 2
Plan4.PlanId = 3
Plan5.PlanId = 4
Plan6.PlanId = 4

For my needs, it doesn't matter which one is taken first. The Id is used to update a datsbase record.

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Get Datagride Item To Picture Box?

May 5, 2009

I have data gride whose [code]...

this work fine i can get my data on datagridei have some text box and a pictureboxnow i want gt the on picture box(Dataggide view item) no matter i can get the text box

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Datagride - Displaying Recordes According To SQL Statement

Dec 23, 2009

I have a datagride that Connected to SQL Server Database and i was displaying some recordes according to my SQL Statement, and here is my Code

[Code]...

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Datset Update From Datagride Show Error

May 10, 2009

i need to update the data on the datagridview but when i click buttonit shows message "Product not found"i have table call purchase code.[code]

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VS 2010 Read Through A Textfile Line By Line Checking For And Removing Duplicate Values?

May 16, 2012

How do i read through a textfile line by line checking for and removing duplicate values?

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[2008] Datagridview - Duplicate Cell Values [non-unique To Unique By Appending]

Jan 10, 2009

I'm using the datagridview. This is the sample data:

[Code]....

How do I parse through the grid to rename the duplicate values in a particular column (in this example it's the l_name field) into such a format?

[Code]....

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