VS 2008 ListView As Detail - Database Id?
Feb 16, 2010
I have seen listview controls before that do not show any type of ID. (ie: Items in an order). So when I delete this row, how does it know which row to delete in my database? There could be many rows with the same exact data but each belonging to a different order. Would there be a hidden column with the record ID in it? If it is a hidden column, how would I go about this?
I've used this method for returning id's for ComboBox's and Listbox's:[URL]
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Jun 14, 2011
I have a listview set on 'Details' and its full of data. There's about 6-7 columns. I want to export certain rows if they are green and exclude the rest.
[Code]...
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Feb 10, 2010
I have been trying to create a listview in detail mode which has 2 images (a light is on and one with the light off which represents a boolean value) I have gotten some code which populates the Listview during runtime but i have tried various ways to get the images into this without any success, google has been particularly useless and most examples seem to involve creating an array for each row(great if you have all the data in the first place, my project will perform like a log, it will show an Id, a Name and then 2 colums which should have on/off icons in them.
This is my sample code which works by creating a ListViewItem, adding the items for the row and then adding it. When i did this on my project however it showed nothing in the view (presume i need to refresh it after each add?)
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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Sep 24, 2011
I've attached a picture of the list view control that I am using. I've been fine until now, I want to save the entire line of items in the list view control (item_description, price) and dump it into the MySQL database to allow tracking of reciepts. The following code that I have saves the first column worth of information, but I cant figure out a way to save the second column (the price)
Dim li As ListViewItem
For Each li In ListView1.Items
CurItems = CurItems.ToString + li.Text + ", "
Next
Oh right, and I'm making it comma seperated values so I can pull it up in a readable format again.
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Nov 12, 2011
I use a simple master-detail form using Visual basic 2005 express edition and ms sql server 2005 express edition, as well.
The master table is dept (deptno int, dname nvarchar(50)) .
The deail table is emp (empno int, deptno int, ename nvarchar(50)).
The primary key for the dept table is deptno and for the emp table is empno.
There is also a foreign key (deptno on emp table).
I created a new project, connected to a db (called test.mdf) and created a data source consisting the two of the above reffered tables.
I dragged and dropped these tables on the form and i noticed the following:
1)When the form opens... the system queries the database and displays the data on each block on the form.
2)I insert and/or update a record on the master table (dept) and everything goes well...
3)I try to insert and/or update a record on the detail table (emp) and nothing is changed on the detail table - without any error.
4)When i try to insert and/or update a record on the detail table (emp) which violates the primary key constraint or foreign key the system complaints...(as expected).
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Jul 13, 2010
I have made several posts on here lately regarding master/detail or parent/child data setups but no one has been able to help. It seems like a subject people don't like to tackle BUT I really need help.
I'm having a real hard with the DataView.RowFilter functionality and it is driving me insane.
For the most part, I have the basic master/detail functionality working. When you select a record in the first grid, it shows the correct data in the second grid. When you enter a record in the first grid, you can enter related data in the second grid. I accomplish this by using a dataview and row filter bound to the 2nd grid. When you change the record in the first grid, the rowfilter for the 2nd grid is restated and reapplied.
The problem arises when I overwrite the primary field value in the first grid and the detail records become orphaned. You would think all I have to do is change the ID in the 2nd grid to match the new ID in the 1st grid but this is where I am having problems. I wrote a loop to change the ID of each record currently loaded in the 2nd grid to match the newly changed ID in the first grid. The code is here:
Code:
Dim I As Integer
For I = AuthorizationGroupsDGV.Rows.Count - 2 To 0 Step -1
AuthorizationGroupsDGV.Rows(I).Cells(0).Value = StrEmployeeID
Next
I have used this code before and it works great. It has to step backwards through the grid because when the ID's are changed, they no longer match the RowFilter criteria and they disappear from the grid. They still exist in the dataset. The problem is, while the code "works" the intended effect does not. Some of the records completely disappear from the dataset and do not reload when I restate the row filter against the new ID number.
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Aug 2, 2009
There are a lot of master/detail databinding examples with detail form on the same window than the master, I can't find any example where detail is in a new window.
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Sep 29, 2009
I have a dataset containing 2 tables,Customers and Contacts. Just showing the master-detail is not a problem. Problem occurs when I try to search the master table to bring in the detail table. Searching the master table shows only the master record, but not the related detail records. Adding a 'findby' query on the detail table only shows the records.url.. Normally when the master table is filled, the detail record shows in a form.
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Jul 26, 2010
I have a data structure that I want to represent in a master-detail (hierarchical) grid. Is there any such control in .NET or I have to purchase a 3rd-party ?
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Aug 24, 2009
Well, just struggeling to decice on which would suit my situation best. I am developing a simple app to show a log of radio messages. Should I display these in a listview or in a datagridview? What is the actual difference?
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Dec 15, 2009
Okay, I've made a local database now and everything is okay. But I don't want the normal data grid view, I want to display the information in a list view. How can I do that? Do I have to make some sql queries or something?
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Nov 14, 2009
if this question has already been answered many times, but I am new to VB and I don't really understand any of the examples I have found by trying to research this topic. I am using VB 2008 Express Edition. My List View is called listView.
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Jun 20, 2011
I have a parameterized query that displays the info (name, phone number, email addy) in detailed text boxes vice a normal DGV. I have coded a button to open outlook and populate the email address, but what I would like to do is have the user click another button that would add each email address into an array or collection from the desired records. Then, when they added all desired recipients to this "collection" they would hit the email button, which would open up outlook with the To: box already populated.*
I have looked into dynamic arrays , generic and special collections but am not sure what the best way forward is. When using the dynamic arrays I didn't really get anywhere, I couldn't seem to figure out how to redim with each addition of an email address.
Dim emaillist() As String
Dim listings As Double
Dim addy As String
[Code].....
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Jun 10, 2009
I want to get the detail of all the applications running in windows like
Application name : Status : User : Resources Usage : etc....
also I want to get the detail of all the users logged in at a time
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Apr 23, 2011
I created a listbox that displays files from a certain directory, and want to know how to actually get information on that file, rather than just the name its self that is displayed in the listbox.
This is what I have:
Dim files() As String = IO.Directory.GetFiles("C:Users" & (System.Environment.UserName) & "Desktop", "*.txt", IO.SearchOption.AllDirectories)
Label9.Text = ListBox1.SelectedItem
[Code]....
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Sep 1, 2009
I've tried the following code but it doesn't delete and no error message received.
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Dim Station As String = ""
For Each sItem As ListViewItem In lvList.SelectedItems
[code]....
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Nov 16, 2009
I am very new to Visual Basic, and I need to add items from my database to the ListView control. I have a table in the database called tblChannels that I would like to draw the information from and populate the ListView control in VB, in the form of a column. I currently am unsure about how to go about doing this. Previously I have created combo boxes that draw the information from the database, but trying this method for the ListView does not work how I want it to.
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Apr 2, 2009
I have the following code that creates a master/detail scenario between a products table and a test table based on the productid: [code]Unhandled exception has occured. the constraint cannot be enabled as not all values have corresponding parent values as you will see, where I add the datarelation between the two datatables i've added a false. This ensures constraints are not created.That solved the problem. However, I want to know if this is the correct solution. It is really difficult to troubleshoot as I cannot reproduce the error. The database is accessed through the network. it could be the network was down at the time so the child records where not inserted hence the error.
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Nov 18, 2011
i would like to import the data in my database into listview. i dont know how to start
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Dec 30, 2010
I want to search a sql server database from VB.Net and output the results in a Listview. I don't want to use code that involes queries in it, but the queries are to be used in the data set designer, i.e the query builder.Here's what I got so far.
I created a query in the builder called SearchStudent
SELECT FirstName, Surname, Email, PredictedGrade, Notes
FROM tblStudent
WHERE (FirstName LIKE @FirstName) OR
(Surname LIKE @Surname)
Here's the code to search the database and fill the dataset
[Code]...
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Mar 15, 2010
In it's simplest form, I have two forms a master form and a detail form. I added the data source from within the ide.
Data> add new data source database>new connection > microsoft sql server database file. Selected table etc.
From the datasources tab in the ide I dragged the grid view onto the master form. dragged the detail view onto the details form.Independently both forms work fine, However if I load the master form first and then load the detail form when the master dgv is clicked the problems start.
[code]...
All variables are correctly declared and the details form works fine, the correct record comes up and can be added, edited and deleted.I then save the form by clicking on the save icon and close the form but changes made to the details form (e.g. additions or deletions) are NOT reflected on the master form until I close and rerun the application. guess it's just a matter of refreshing the right control(s) on the master form but I cant seem to find it.
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Apr 14, 2009
I have a product table with ProductId,ProductName,ProductCode as fields. I've populated a combobox with productnames. Next I have two other tables called Result_Header and Result_Detail. The Result_Header table has ProductId as a foreign key and BatchNo,TestDate etc. The Result_Detail table has ResultId as a foreign key which is the ResultHeaders Primary Key and other fields such as Result,SpecHi etc. What I need is when I select a Product from my combobox my two datagridviews must be populated via the Result_header and Result_detail tables respectively.
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May 8, 2009
My client recently got this error but I can't reproduce it on my pc. Any Idea what the problem could be. I have a master/detail scenario. So I have a grandparent/parent relationship, so when I select a product from my product combobox it displays the relevant results from the Result_Header table in my first datagridview.
Then I have a parent/child relationship so that when I select a result_header item from my first datagridview it displays the child records from the Result_detail table. If i'm adding a new Result_Header and then click save, I search for existing tests for the chosen product and insert them as new datarows into the Result_detail table. then I can update the child rows and click the second save button and it saves what I edit. Quite complicated.
Dim data As DataSet
Private dbpath As String = My.Settings.dbpath
Private con As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;" _
& "Data Source=" & dbpath & ";Persist Security Info=False;")
[code]....
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Sep 22, 2009
I have a vb-2008 program that contains a (listview) control.
View = details
AllowColumnReorder = true
Lets say the table has 3 columns (a,b,c) and 1 row of data.
a b c
1 2 3
I want the user to be able to re-arrange the columns (by dragging the column headers) before printing the contents of the table.
c a b
3 1 2
Statements like:
.. ListViewX.Columns(2).Text
.. ListViewX.Columns.Item(2).Text
.. ListViewX.Items(0).SubItems(2).ToString
Give the column-name (c) and cell-contents (3) of the origional table .. not the (3rd) column (b) of the re-arranged table.
How can i get the column-name and cell-contents of the (3rd) column of the re-arranged table?
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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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Mar 20, 2010
i am developing a point of sales system. currently i have my product code scanned and displayed in a listview. lets say that i have 5 product codes displayed in my first listview. By clicking on a button, how can i use these codes to call upon the details (prices, product name, etc.) of the corresponding codes and display in another listview?
i am using Visual Basic 2008 and MsAccess as my database. who have the idea on solving my question. (As my last thread has not been answered at all..
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Jan 18, 2012
I want ListView instead of CheckedListBox files in checkedListBox is being updated via ListBox1 How can I add the size of file too in listview
[Code]....
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Jan 15, 2010
I have a listview control. it has an imagelist attached to it with two images in it. I have entered items into my listview, and they are using the first image in my imagelist.... GREAT! Now, there is a variable I have that will tell me which index in the listview is currently active, noting to do with what I select that could be at another index it's just what's being processed by the program at the time in some task.
Create a function that will change the images of all my listview items by looping through them. If the index variable is set to 2, I want the 3rd item in my list view set to use the 2nd image in my imagelist. The rest of the items in my listview need to be set to the first image in the imagelist.
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Jan 14, 2009
[code]Ok I have an access database and Im needing to get AgentName and QuicklookID values from the databse and insert them into the listview. The code I posted does get the first one. But Im wondering how exactly to get all of them in the database? Ive looked everywhere for samples and my books are still packed.
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Nov 25, 2010
i have created a new form to display the listview that contains the field from my database but when i build it theres no data that display on the listview heres my code
Public Class listview
Private Sub ListView1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListView1.SelectedIndexChanged
[Code]....
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