Filling ListView Using Linq
May 25, 2009How do I fill a listview using Linq-to-Sql? Once filled, will it be editable?
View 3 RepliesHow do I fill a listview using Linq-to-Sql? Once filled, will it be editable?
View 3 RepliesI'm trying to develop quite a complicated project. The task is managing an eBook / audioBook frontend checkout system. The idea is that the database is parsed into a listview and the user can then download the desired files.
I've got a webpage on my server. Here is some sample data. I cannot change the delimiter - because it is automatically generated by a software application existing on the server.
||1||bookname1||1st Edition||John Smith||file1.pdf||0||ebk||1||
||2||bookname2||2nd Edition||John Doe||file2.pdf||1||ebk||1||
||3||book name 3||2004 edition||Joe Bloggs||file3.pdf||0||ebk||1||
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Fill the list view selectively Send each selected filename (path + file) to a function one at a time on the onclick of a button which will then download each file.
I am trying to fill a listView with data of a DataReader, this is the
Dim CMD As New OleDb.OleDbCommand
CMD.Connection = CN
CMD.CommandText = "select Name, DNI, Sum(Price) from ORDERS group by name, dni"
Dim miDataReader As OleDb.OleDbDataReader
[Code]...
In my webpage i use the following in order filling the listview control
[Code]...
I am currently using VB 2008 and there is a form I'm using which contains a listview control. I am dynamically filling the listview with groups and items. After I fill it up, it is supposed to look like this:
[CODE]...
Each item is specific for each group. The problem I have is that when I maximize the form to full size, and everything expands, the items change positions into something like this:
[CODE]...
How can I make the listview keep the items in the "row" view always, instead of the "column" view whether I maximize or not?
I've recently been exploring the uses of linq to use for comparisons,but really need a bit of a kickstart.Say for instance i have a listview populated with numbered names and I want to put up a message box if certain conflicts arise
such as this:-
This string combination is ok:-
1 fred
1 fred
2 fred
[code]....
So to summarize, the prefix number can only have one unique name assigned to it, and that unique combo can be used as often as you like.
[code]The scroll bar appears so some thing is being added but nothing is displayed. The items are in the annon member.
View 5 Repliesalso i have a table called Orders with several columns, they contain information about the order and store the ID of the Customer they belong to.Question is: how can i query that table with (preferably) linq (the datacontext is from LinqToSql) to return the following dataI want to search for any entry with the matching CustomerID which took place, group them by Year, Sum the Totals respectively and add them to the listview?I now i could use lamda expressions and aggregate, its just not clear how (option infer on,db is a datacontext object,CustomerID is an int32 variable):
Dim Orders = (From order In db.Orders Where order.CustomerID = CustomerID).GroupBy(Function(p) p.Date.Year).GetEnumerator
I reckon i'd have to create an anonymous type like the following:
[code].....
given this function:
Public Function Search(ByVal StartIndex As Integer, _
ByVal MaxResults As Integer, _
ByVal AccountNumber As String, _
ByVal LastName As String, _
[Code]....
instead of what I expected:
Select count(*) from remitline where lastname = "smith"
What am I doing wrong building up the where clause? I'm using Castle ActiveRecord 2.1
if there is that much of a performance gain in running a LINQ stored procedure versus a LINQ query?
View 1 RepliesI have a listbox on my xaml form that I bound to a List(Of MyType) property. I populated this list like so:
Dim fields As List(Of CheckableFields) = New List(Of CheckableFields)
Using context As ITIPEntities = New ITIPEntities()
Try[code]....
Now I'm at the point where the user selects the fields they want included in a report and I need to iterate over the required fields. This is my linq query:
For Each checkedField In _requiredFields
If checkedField.IsChecked Then
If checkedField.FieldData IsNot Nothing AndAlso checkedField.FieldData.Trim IsNot String.Empty Then[code].....
i want to format listview head of listview textalign = center and item of listview textalign = right
View 1 RepliesExample-I have a person class
Public Class Person
Private _fname As String
Public Property Fname() As String
[Code]...
Forgive my ignorance on this.I have this LINQ Query:Dim ngBikersDataContext As New CarBikeWalkDataContext
bikersList = (From c In ngBikersDataContext.Reg_Bikers _
Order By c.L_Name _
Select New Bikers() With { _
.BikerID = c.BikerID, _
.F_Name = c.F_Name, _
[Code]...
with the error "Overload resolution failed because no accesible 'Select' accepts this number of arguments."
Over the "NEW" I get an error " ')'expected."
I am trying to fill form located here [URL] web browser control.i am using below mentioned code
Private Sub WebBrowser1_DownloadComplete()Dim looping As IntegerDim hDoc As MSHTML.HTMLDocumentDim hCol As MSHTML.IHTMLElementCollectionDim hInp As MSHTML.HTMLInputElementDim hSub As MSHTML.HTMLInputButtonElementDim hTxt As MSHTML.HTMLInputTextElementMe.Caption = WebBrowser1.LocationNameIf WebBrowser1.Busy = False ThenFor looping = 1 To 10000NextSet
[code]....
i am also unable to select radio button regular link.I just want to know how to add text to textarea box "Description" and also want to know how to select specific category from combobox category.
My problem in the Combo Box and SQL query .. I have three comboboxes linked to an Access 2007 database
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I'm not 100% sure where to post this, as I'm making the program in VB.net, however It is linked to access and is getting the information / saving it into there.
I have a customers page and a jobsheet page,
the customers page is where the information on the customer is stored e.g. "Company" ,"First name" and "Last name".
When I Go into jobsheet, I have made it in so that company searches for the record from access so there is a list e.g. "Big W" , "Bunnings" etc, and tied up to the company is a name of the person in that company.
My question (after all the babble) is how can I make it so when I choose "Big W" from the list, it auto fills in the "First name" with 'John' and last name with 'Smith' , and if I choose Bunnings it uses the name associated with that and etc for the other companies.
I'm trying to fill a DGV from a (List Of).. This is my code. It's not working & I don't know why..
Public AllBooks As New List(Of Book)
Public dgvInventory As New DataGridView
Private Sub BookDetails_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code].......
Ok basically I want to select a point on a bitmap and then fill all of the color that is the same as the color at that point touching that color with a different color. If that sounds confusing, just think of the paint bucket tool in mspaint or photoshop. Currently I do this by starting with the point selected and then check all the points around it in an ever expanding box until at last no new contiguous points of the color to replace are found.The bad news: This is slow as heck =(I remember my windows 98 computer could handle this just fine with no noticeable delay. So I'm either missing something algorithmically (is there a better approach) or VB.net is just too slow to accomplish this without some sort of different approach/optimization.
[Code]...
As you can see, right now I just select the middle point as where I want to start filling from, and I fill with the color aquamarine. later I want to make this more flexible, but right now I just need this to be faster.
My general algorithm works like this:Start with a 3x3 pixel box with the first pixel (already changed to your new color, with the old color stored) as your start point.Check if each pixel is the color you stored (the one you're replacing) If it is, check if it's next to the new color you're replacing the old color with. If it is, replace it and increase the size of the box.The process ends when no new pixels are replaced.
i have a combo box that i'm trying to fill from a database, managed to get it working through the wizard and the form view method but could do the next bit that way. I then started to try it the coded way, got the database linked but it only shows the first name in the database, how do i get it to show all the names in the database?
this is the code for the form
Imports System.Data.OleDb
Public Class NewTicket
Dim ds As New DataSet
[Code]....
I'm trying to get a combo box to fill itself from a MS access database field but I can't get it to work. I can get it to work at school but not at home. Also can't get a program that worked at school to work here so I'm guessing that somewhere there is something blocking the connection to the database. I've gone into the MS access trust center and looked at the settings there but I can't see anything that would be stopping it. I just need to find that setting (if it is indeed a setting) wherever it is and fix it so that I can access my database. I am not using visual basic from access I am accessing access through visual basic.
I can't get it to work with an ADO connection, either. Also when preview data via clicking smart arrow on the combo box then going to preview data I can see the data just fine. Also I just noticed I get two lines in my output after the file is run that say "A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll" I don't get these lines if I comment out all the code for the combo box.
I am trying to fill a combo box using a dataset and data adapt. I am struggling too work out how to do it. I thought it would have been easy but I was wrong. i can set the text to read the first line of the colomn but nothing else. I was wondering if anyone could help me out with what I have to do. I think I have to increment inc and add a line underneath but I don't know how to do that
comboMaps.Text = datSet.Tables("TheLastShot").Rows(inc).Item("Maps")
I'm having trouble filling a ComboBox from a dataset. When the program runs, the combobox has the correct number of lines, but they all appear as System.Data.DataRowView.[code]
View 1 RepliesI have a program that is connecting to an oracle database. I am using the table adapter to fill a combobox to select a model. Then I am connecting to the database programically to return a max and min value based on the selected model. I am doing this by passing parameters back with the selected mode. This all works fine. Here is my problem:
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I am having trouble getting my program to work. i added a database conection and added the data source, then placed the list box i wanted in the form and the code to fill the list appeared as it should. the problem is when i run the debugger i get an unhandled exception saying "invalid user authorization". i went to the data source and previewed the data set and i can view it just fine. i did this in a different program using the same data set and had no problems.
View 1 RepliesI have a combo box in a form, I want to fill it with names I have stored in a database.I know I have to use the fill command, but I am not sure what code I need to use.I imagine I need to place this code in the form load event, where I wrote my code to connect to the database.Tell me if I am wrong, but, do I need to create a sql fill command, select Names From Users, then execute that command in the combo box object.
View 6 RepliesI am trying to fill an array of buttons:
Public buttons(0 To 30) As Button
This is how I am currently filling it.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
buttons(1) = btn1
[code]...
However, the 'btn & i' is invalid code. But you should understand what I'm trying to do here.
I have a PDF template with 1 field on it: Barcode I have a CSV with about 800 records all containing 1 field; Barcode I know how to open de Template and assign a value to a field. And how to write a new PDF with the right barcode on it.But my problem is that I want to create 1 PDF with 800 pages.Thus, not 800 seperate PDFï and then merge them into 1 but I would like to write the content of the memory stream into 1 pdf.
View 1 Repliesfinally given up trying to make it work with my stored procedure.
Info:
Sql Server - 2005
Table name - venatio_company
Dim con As New SqlConnection
[code].....
filling datagridview vertically vb.netTommyTubes
View 1 Replies