Check Duplicate Each Item Listview From Database
Jun 18, 2012
check item listview to avoid duplicate item in database. I have 1 listview, my plan the listview checking each item from database before insert to database. and item in listview obtained from opendialog excel this is my code : when items duplicate already exist, my app error/stop at cmd.ExecuteNonQuery() and I'm hopeless to code check each item when reportcode exist in row of 5 or other row
Private Sub BBIUpload_ItemClick(ByVal sender As System.Object, ByVal e As DevExpress.XtraBars.ItemClickEventArgs) Handles BBIUpload.ItemClick
Dim iCount As Integer
[Code].....
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May 28, 2012
i don't have any idea how to remove or prevent duplicate item in a listview when ever you update it or insert value to your data base.
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May 7, 2012
I have a window which has 8 items in a listview along with 2 radio buttons below the listview. The user is able to select one or more selections in the listview and turn the selection on or off with the radio buttons(live, prior to hitting the submit button), my question is how do I tell which selection was changed? I was going to put the one or more selections into a string/array and use that later for some messages once the user hits the submit button. I can almost think of it but can't quite get there, i'll be using an if/else with the .selected option in listview items but am not sure how to tell if the user, say,goes back and changes the option from On to Off(Off originally)to remove that option from the array.
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Jun 8, 2011
i have create 1 listview & checkbox inside listview. how to print check item in listview.
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Jan 7, 2011
I want to know how I can check with the listview item on my main form to see that if the text property of the selected listview items has got the same text property of the listview on the another form?
I used this:
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim i As Integer
If Form1.ListView1.Items(i).Text = Me.ListView1.Items(i).Text Then
[code]....
The item I have been added after I have got the same item as my form1.listview.items and form2.listview1.items. How can I find with both of the listview items that if both have got the same text property similar as I have created? I am not sure if the form1.listview1.items(i) variable is incorrect.
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Apr 9, 2012
I want to know how I can check the string 'enabled' in my php page for each paragraph while being matching with each listview items that i have extract the strings from my php page?
Here's for an example: i check the string 'enabled' in paragraph one and if it does have it then tick the checkbox on the listview item 1 otherwise untick.
i check the string 'enabled' in paragraph two and if it does have it then tick the checkbox on the listview item 2 otherwise untick.
i check the string 'enabled' in paragraph three and if it does have it then tick the checkbox on the listview item 3 otherwise untick.[code]...
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Jun 6, 2011
i hve create checkbox in listview..how to export check item in list view to crystal report, so i can print item that i hve check...
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May 13, 2010
I am creating a program in which there is a listview control with many items contained in it. It also has checkboxes for each of them. I am trying to get it so that when you check the checkbox next to an item, it removes the item from the list. I am using this code:
Private Sub ListView1_ItemCheck(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs) Handles ListView1.ItemCheck
ListView1.Items.RemoveAt(e.Index)
End Sub
When I run this however, and check an item, it gives me this error (I am checking the first item in the listview, which would mean the index is 0): InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index
I've have been testing this code out for both the listview events ItemCheck and ItemChecked. How is 0 out of the index range? Wouldn't it be the first item in the listview, in which case it should remove the item.
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Feb 20, 2012
If I select an item from listview, it will get all the records at the database and display it to richtextbox.
For example this is my listview[code]...
After I select it, the 2 richtextbox will be filled with diagnosis and prescription.
I don't have any idea how to do it so I don't have any codes to show yet but I was able to display the records from my database to the listview. The only thing left is when I clicked it, it will display the records.
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Jan 25, 2009
what is the fastest way to check if Item ID exist in the database?
From what i have done, i have an excel file uploaded to datagridview, then each itemID is retrieved line by line, then accessed the database to check if ItemID exists.
Is there a way to retrieve the whole column of itemID and then query it to MSSQL2000, then display the itemIDs that does not exist.
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Nov 11, 2011
Here's my delete button
If MsgBox("You sure?", MsgBoxStyle.YesNo, "Wait..") = MsgBoxResult.No Then : Exit Sub : End If
rs = New ADODB.Recordset
rs.Open("select * from Rami where Name like '" & Me.Text & "'", cn, 2, 3)
rs.Delete()
DisplayList()
I get that error when I try to delete:Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record.
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Jun 23, 2012
i have datagridview,listview, and database..how to retrieve the data from database into datagridview by using item in listview?
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Jun 30, 2011
i am checking for if the column code is Null or not in that same i wnat to check whether the column has any of the duplicate values then i should mark as isGoodRecord = 2,
If (IsDBNull(Row.Code) Or Row.Code = String.Empty) Then
Row.IsGoodRecord = 2
ErrorDesc += "Code is blank;"
end if
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Jul 5, 2011
with vb.net + access 2007 i am having a access database with about 4 lakh + records the table is having a Autonumber field + other fields like crewID, dutyDate,DutyOn,DutyOff,Dutytype,allowanceOftheDay.... etc
i need to check for the duplicate records that is i need to compare each record with remaining 3 lakh change records ( crewID + dutyDate + DutyOn + DutyOff + Dutytype + allowanceOftheDay ) = ( crewID + dutyDate + DutyOn + DutyOff + Dutytype + allowanceOftheDay )& if exists i need to delete the same using Autonumber field the group by class of the query is not working i tried to loop through each record through front end but it is taking more than hours
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Oct 18, 2010
I think I got most of the syntax correct for this however I keep on getting a syntax error: "Must declare the scalar variable "@Day"
Private Function FiveMinImport()
Try
Dim FileName As New String("C:5min.xml")
[code].....
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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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Jun 27, 2012
I wish to get a quick feeling for how much copy and paste coding we have, there are many tools for C# / Java to check for this type of thing. Are there any such tools that work well with VB.NET? (I have seen what looks like lots of repeated code,
[Code]...
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Jul 25, 2010
I've been trying to feed a multi line textbox into a string array then check item by item if a string contains part of it.
[Code]...
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May 19, 2009
Ok, so I have a listview on one form, and when a button is pressed it opens up a new form with the contents of the selected listview item and it's subitems in a series of textboxes. The user can then change the data in the textboxes and either press save to make the changes or cancel to close the window. What command would I use to change the selected listview item and subitems to whatever is in the boxes?
this is the code that populates the boxes:
Private Sub Form_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim appeditcontents As String = main.passlist.SelectedItems(0).ToString
[Code]....
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Oct 31, 2009
Just started on vb.net
I have a combo box with "yes" and "no" with i select Yes i want the label2 to change the text to "yes" likewise with "no"
I've tried to code it in a logical way as possible but it just doesn't works except for the "wtf" so i think that overall my code is correct but the way i want to retrieve the selected item from combo box is wrong.
Public Class Form1
Dim aa As String
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
[Code].....
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Jun 14, 2008
I need help on improving the performance of a program I wrote some time back. This is the main performance issue of the program below. Basically I need to look through some data that is displayed to a user in a list view and determine if the data is a duplicate of any other data in the list. If it is I need to delete the duplicate before my program continues.The below code does the job just fine, however the list view of data has approximately 30,000 rows of data. Hence looping this list 30,000 to the power 30,000 times makes the program very slow. Note subItem(4) in the data is the "unique" identifier that I later discovered was not so unique....
This was a work around function implemented in the code back when I wrote it (not meant to be permanent). I know that listView is not Ideal to store this much data.how to store the data in a more efficient manner or improve the performance of the Search and Delete [code].....
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Aug 30, 2010
I was generously guided by the community to use LINQ to find duplicates on my listboxes the last time around. However, I am now in a tough spot because I need to find and remove duplicates from a multicolumn list view. I tried using LINQ but it says that the listview object is not "queryable". Is there a way for me to find and remove duplicates using only one column of the listview? [code]The code now runs fine when I call it. But it does not remove the duplicates:
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May 17, 2011
I have this code to delete the duplicates but i am stuck on how to firstly combine the subitems before deleting the duplicates.
vb.net
Dim DuplicatesList As New List(Of String)
For Each item As ListViewItem In Me.lstTakeoffList.Items
[code].....
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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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Apr 21, 2011
I'm trying to add a string to a listbox if there is none exact string existed inside, but it turns out a very weird error. Look at this.
On form_load, I have this:
AddHandler Server1.OnUserLoggedIn, AddressOf HandleUser
And then,
Public Sub HandleUser(ByVal username As String)
'Here, you handle adding the text to a text box.
Me.Invoke(New PrintMessageDelegate(AddressOf AddUser), username)
End Sub
[Code] .....
The output is when I connect the first client, it works fine. But, when I try to connect the second client, it prints out three times both the listbox1 item and the txtDisplay. It's like get caught in loop, but I have tried other kind of loops like for each and other string comparison too, still work that way.
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May 10, 2012
i've this code to insert records into datagridview
PrivateSubForm1_KeyUp(ByValsender
AsObject,
ByVale
AsSystem.Windows.Forms.KeyEventArgs)
[code]....
the trouble is that i need to evaluate the duplicate item from serialtextbox when the scanner put in the code?
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Sep 8, 2011
How would one go about checking a listbox's items for duplicates? Basically I need to write a program that displays the teams from a text file provided by my instructor, in alphabetical order. I can do that, but what I can't figure out is how to prevent the For loop from adding a duplicate team. What I'm envisioning is:
If teams(i).name is not in lstTeams.Items Then
lstTeams.Items.Add(teams(i).name)
End If
I have a program that compiles and works so far, except for the above problem and my alphabetical order (which I can probably figure out on my own:
Public Class danbrockteams
Structure team
Dim name As String
[Code]....
This works except that my listbox is filled with the team every player is in rather than just listing all possible teams. Not exactly looking for someone to just give me the answer, as I understand things best when figuring them out on my own, so I suppose a hint is what I'm really after.
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Jan 12, 2012
removing Listbox item from checked Listview item.The code I tried just errors out.
Private Sub ListView1_ItemCheck(sender As Object, e As System.Windows.Forms.ItemCheckEventArgs) Handles ListView1.ItemCheck
If (e.CurrentValue = CheckState.Unchecked) Then
ListBox1.Items.Add(Me.ListView1.Items(e.Index).Text)
ElseIf (e.CurrentValue = CheckState.Checked) Then
[Code]...
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Feb 12, 2010
I have a media browser program I am building. I am trying to use drag/drop so a user can drag media tracks from one listview to another listview and then use the second list view as a playlist in windows media player com object. Reading at MSDN I have found out that there is no built in support for item re-ordering with the listview control. I have listview1 working correctly but when I try to reorder items in listview2, the dragged item ends up at the end of the list. So basically I need to get the item insertion index corrected. I have tried more than 10 times to get this code right.
Here is my code which includes a form with two listview's.
Public Class Form1
Private Sub ListView_ItemDrag(ByVal sender As Object, ByVal e As _
System.Windows.Forms.ItemDragEventArgs) Handles ListView1.ItemDrag, _
ListView2.ItemDrag
[CODE]...
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Mar 21, 2010
Do I really have to go through all this just to find out what item has been selected in a ListView?
[Code]...
Isn't there something fundamental like this? Is absolutely everything in VB.NET buried beneath a colossal heap of bureaucracy?
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