VS 2008 LINQ Doubt - Display The Queried Out Put
Feb 12, 2012[Code]...
what mistake i am doing here while execution
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Display Queried Results In Textbox Where Criteria In Another Textbox 1 Form
Jun 21, 2010I have a database I am creating with about 50 users over a network. There are about 6 groups of users and these users are spread across 10 branches. I want to block/allow users from particular forms and views. For example I want branch users forms to be filtered by their branch number but depending on the group they are in they can only see some forms. i.e. 50 users, 10 branches, each branch has about 5 ppl of where 1 is in group A and 4 are in group B. I want all users that belong to branch 1 to see the information they enter, but Group B enter data but cannot approved or delete, and group A can enter, approve and delete. So then. On my login form I have the user type his/her username but the i want LEAVE function to update 2 textbox where I have named GroupName and BranchNo. Basically to run a query and look for the username and return in one textbox that user's groupname and the other textbox the user's branch no. This information will be used to filter forms and block the user from certain controls. This is the code I have so far but still can't figure how to display the results.
Private Sub UsernameTextBox_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles UsernameTextBox.Leave
'Make Connection to database
[Code].....
It keeps highlighting the BranchNumber and UserGroup and giving error "Value of type 'String' cannot be converted to System.Data.OledbCommand
VS 2008 - WMI And Adding Queried Information To TreeView
Dec 14, 2009In the following code example, I am querying WMI for Memory Modules and adding the information to a TreeView component.
VB.NET
Dim Scope As New ManagementScope("
ootCIMV2")
Scope.Connect()
Dim objectQuery As New ObjectQuery("SELECT * FROM Win32_PhysicalMemory")
Dim Searcher As New ManagementObjectSearcher(Scope, objectQuery)
[Code] .....
When I run the code, I expect to see a Parent Node named System Memory, and two Child Nodes for each memory module installed. I do get the appropriate Child Nodes, but I also get an extra Parent Node and I can't seem to figure out why:
Move Queried Data From One Database To Another?
Nov 11, 2010I have two databases, d1.accdb and d1b.accdb (So I have two connectionStrings). In both of these databases there is a table called Postings with exactly the same fields. All i want to be able to do is query the Postings table in d1.accdb for all the records where the users name is xxx. I then want to move all that data to d1b.accdb. I found another thread that was started in like 2007, and tried to follow their instructions, but cant seem to get it to work. Here is the code I am using:
[code]...
When I run getUserPostings(), i get a OleDbException saying invalid argument. Does anyone know how to fix this? or perhaps know another way to do this?Once i get this to work im guessing i would just add "WHERE UserName = 'xxx'" to the end of the OleDbCommand Strings.
.net - Anonymous Type, Cast As AsQueryable From An If Statement And Then Queried?
Nov 2, 2011I have this if statement, which returns the result as a AsQueryable to an anonymous type:
If (signature = "") Then
testResults = (From TRTable In context.TestResults
Where ((TRTable.Art_no = currentProduct) And (TRTable.Server_time > startDate) And (TRTable.Server_time < endDate))
[code]....
I can't seem to figure out why it isn't working, it was working without the if statement, but I need that functionality.
Asp.net - SQL Server 2005 - Pass In Name Of Table To Be Queried Via Parameter
Jul 16, 2009Here's the situation. Due to the design of the database I have to work with, I need to write a stored procedure in such a way that I can pass in the name of the table to be queried against if at all possible. The program in question does its processing by jobs, and each job gets its own table created in the database, IE table-jobid1, table-jobid2, table-jobid3, etc. Unfortunately, there's nothing I can do about this design - I'm stuck with it.
However, now, I need to do data mining against these individualized tables. I'd like to avoid doing the SQL in the code files at all costs if possible. Ideally, I'd like to have a stored procedure similar to:
[Code]...
Is this even possible in SQL Server 2005? Alternate ways to keep the SQL out of the code behind would be welcome too, if this isn't possible.
Format A Numeric Column In A Datatable That Is Queried From SQL Server?
Oct 26, 2011I have a datatable that is queried from SQL Server database, and it has a numeric column and I want to format it to "###,##0" format for readability reason. I tried:[code].....
View 2 RepliesVB Database That Can Be Queried Via Sms And The Required Information Sent To Mobile Phone
Oct 3, 2011I am new to VB/VB.net and i will really need help in developing an application with VB.net and to be able to access the information via sms query.
[Code]...
How To Return Binary From DB Using LINQ To Display In Browser
Apr 1, 2009I am trying to return a binary from the DB using linq for display in the browser. The method below using ado.net works but I am trying to ypgrade to linq but the linq version returned the error.
Public Sub ProcessRequest(ByVal context As System.Web.HttpContext)
Dim imageId As String = context.Request.QueryString("id")
Dim ret As DataTable = Nothing
ret = DPGetImageData.GetImageById(Convert.ToInt64(imageId))
For Each dt As DataRow In ret.Rows
For Each c As DataColumn In ret.Columns
[Code] .....
DB/Reporting :: Display Single Record From Linq Query?
Mar 24, 2011For a school programming project we are supposed to create a database with 2 tables country, and continent.then we populate country with every country name, population and continentID. For continent we populate with each continent name.
i have completed this step, and i am able to run a linq query to display all countries and corresponding continent into a datagridview. My problem arises because we are supposed to display each record one at a time, and be able to cycle through one at a time. I cannot for the life of me figure out how to do this.
for example if i made a query to select all countries in africa, i want to beable to display the name of the country, and population in textboxes. then have a next button that will go to the next record.
Display Duration Only Hours:Minutes:Second In Gridview Asp.Net By Using LINQ To SQL?
May 18, 2009I want to display the duration only Hour, Minutes, and Second in data Gridview by Subtract TimeCheckOut from TimeCheckIn in ASP.NET using LINQ to SQL Here is code behind:
[Code]...
In Line 3 in function, Dim dif as TimeSpan = DateTime.Now.Subtract(Duration) which give only the duration of Hour, Minute, and Second from TimeCheckIn until DateTime.Now. However, I want to have the duration from TimeCheckIn until TimeCheckOut only in Hour, Minute, and Second.
I know that the FieldDisplayDuration function is totally wrong logic, but I just want you to get my point only, and also it could be the code sample for those who want to calculate the duration of the employee from the hire date. Finally, Let's get back to TimeSpan by Subtract TimeCheckOut from TimeCheckIn in gridview problem, How can I do that?
ASP.NET MVC - Linq Query With Count Returns Anonymous Type - How To Display In View
Sep 29, 2011So I'm writing a query as follows:
Dim assSummary = From a In db.Assignments
Join ur In db.UserRegions
On a.Origin.ID Equals ur.Region.ID
[code]....
In the controller I can return the data easily as follows:
For Each c In assSummary
MsgBox(c.Description & " " & c.AssCount)
Next
If I pass the object through to the view using Viewdata("assSummary") = assSummary, how do I display the data? Every method I've tried results in messages about 'VB$AnonymousType_7(Of Integer,String) and I don't know how to retrieve the data from the anonymous type.
Sql Server - Assign The Value I Queried To A String Which Is An Argument In A Procedure If The Argument's Data Type Is An Object?
Dec 5, 2011I made this procedure re-use a select query:
[code..]
And I use it like this if I would want the selected value placed in a textbox and it works fine
[code...]
However if I want the value to be passed in a string like so:
[code...]
The string ends up having an empty string value. How do I assign the value I queried to that String?
VS 2010 Upgrade From 2008 To 2010 - Now LINQ - IntelliSense Is Not Working For LINQ Stuff
Apr 20, 2010I just upgraded a project from VB 2008 to VB 2010. Before, the project did not use LINQ. I have started implementing it. So, I have updated the target framework from 2.0 to 3.5, and added a reference to System.Core, and imported the namespace System.LINQ to the entire project and also imported System.Data.LINQ into the form I'm working with (because it was not available in the list for Imported Namespaces in the references tab).
It's not throwing any errors now, but my IntelliSense is not working for LINQ stuff.
For example... I write this:
[CODE]....................
Then, if I type S. on the next line, the IntelliSense doesn't grab what it should for S (Only get Equals, GetHashCode, GetType, ReferenceEquals, and ToString, instead of the options I should get like Count, First, FirstOrDefault, etc...). If I Type S.First. then its the same thing, no IntelliSense that lists the available fields for S, just the standard options (Equals, GetHashCode, GetType, ReferenceEquals, and ToString). I should be seeing my column names in my table when I type S.FirstOrDefault.
So any ideas what is going on? When I type the code, for example, MessageBox.Show(S.FirstOrDefault.FirstName), it works perfectly. But it doesn't change the casing of the text (so it would read s.firstordefault.firstname) and no intellisense while doing it. But no errors. BTW - Everything works perfectly when creating a NEW VS 2010 application, it's just my projects upgraded from Visual Basic 2008 that have this issue.
VS 2008 : Linq To XML - Getting Top #?
Oct 8, 2009if there is a Linq way of doing a TOP to only select part of a datatable? Unfortunately the data won't have it's key yet at the point that I need to do this (in fact, it's the key that we are trying to get back to in the end) so I can't use a where clause that looks at the key and gets the items between a range. Looking for something that's is the equivelent to SELECT TOP 1000 a,b,c FROM ABC ... but in Linq.We're using Linq to XML to transform a datatable to xml, then send it on over to SQL Server for processing. That works fine and dandy - and amazingly fast.
How ever, I've run into a problem where my datatable has an unusually high amount of records (for the type of data that it is). I need to move data on the order of 60k records to the database at some point. currently we're looping through the DT and calling the sproc.... if I did the numbers right, that will take somewhere around 33 hours... easily not an option. Ok, so our best option is to transform the DT into an xml document and send it off, then deal with the data in set transactions. Problem is that I just can't see us sending 60k rows worth of data all in one shot like that....
.net - ActiveRecord Linq/NHibernate Linq Not Building Query Completely?
Jul 14, 2011given 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
Performance Gain In LINQ Query Vs LINQ Stored Procedure?
Aug 6, 2009if there is that much of a performance gain in running a LINQ stored procedure versus a LINQ query?
View 1 RepliesConnect ADO And LINQ In 2008 .NET 3.5?
Jun 16, 2010I am loading al lot of data from a server to a local PC. Then i crate a disconnected table localy and move data from the server to the local PC.Then to update the userinterface (Wondows forms datagridview) i think i will use Linq ti move from this local tabel to the datagridview. On server there is 1000 000 rows in first tabel(source), to the user i have 30 000 rows each time the user loads forms and greate a smaler local table.That is once a day. But each time the user move to next row in datatabel there is 12 rows from my local table who is printed into the a new datagriview.How do i connect Linc to my ado table ?
View 2 RepliesUse LINQ In Vs2008 Using .net 2008?
Aug 4, 2011send me a little desktop application using vb.net and sql server in which LINQ concept is cleared, how to use LINQ in vs2008 using vb.net 2008
View 3 RepliesUsing Dynamic LINQ In Vb 2008?
Oct 17, 2011This is an extension of my last question which was answered, so I am starting a new thread. I have a query in LINQ that I was given to trim down the columns of a datatable. This works well, however, I need to make the LINQ query dynamic. So the query below:
Dim qColumnsIWant = From row As DataRow In inDT.AsEnumerable() _
Select _
EPN = row.Field(Of Integer)("EPNID"), _
EPNID = row.Field(Of String)("EPNNumber"), _
Ingot = row.Field(Of String)("Ingot"), _
ShopOrder = row.Field(Of String)("ShopOrder")
VS 2008 Major LINQ To Xml?
Apr 21, 2010it works absolutely perfectly. I add nodes to the xml document, then I add child nodes using linq query to pull data from a datatable.My problem is. After the LeanerBiographical Node I want to add another node, but when I try the code i higlighted in blue, which needs to go in after the code highligted in red I get this error:Range variable name can be inferred only from a simple or qualified name with no arguments.for the life of me I can't get tgis to work and I need it on Friday. plz plz help me LINQ experts
[Code]...
[2008] Using Select With Linq
Jan 9, 2009I have seen different examples in Linq and one used Select and another didnt but both return the same results. Is there a reason why we should use Select ?
[Code]...
Linq To Entities. GetPropety(name).GetValue Not Recognised By Linq?
Apr 20, 2011I 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].....
VB 2008 LINQ To SQL Classes - How To Use App Role
Feb 18, 2010I am curious as to the proper technique to use SQL Server's AppRole with a LINQ to SQL Class. I understand I have to establish the intial connection with no connection pooling. However, do I simply call the SQL stored procedure sp_setapprole using standard LINQ before executing any of my methods that interact with the database, or is there a better way to enable and use AppRole within the LINQ to SQL class?
View 6 RepliesVS 2008 - LINQ Group By Datatable
Feb 21, 2012syntax of the LINQ query to use GROUP something BY something and select some fields of the datatable. i am having a datatable filled with some rows, i am trying to fill the datagridview with the GROUP BY query output of some fields.
View 4 RepliesVS 2008 Convert SQL Statement To LINQ?
Oct 28, 2009I'm just getting my feet wet with LINQ but am struggling to convert this SQL statement to LINQ.
Dim SQLString As String = "SELECT MESSAGE_ID FROM " & Schema & _
".PPM_TRANSFER_EMAIL WHERE TO_CHAR(IMPORTED_DATE,'YYYY/MM/DD') <= '" & _
DeletionDate.ToString("yyyy/MM/dd") & "' AND IMPORTED = 'Y' AND FILE_NAME LIKE '" & _
mb & "%'"
I have a Dataset that already contains all the data from the PPM_TRANSFER_EMAIL table so it seems silly to query the database again when I can use LINQ to query the dataset.
VS 2008 Linq - The EvensQuery And Num Are Not Defined?
Apr 18, 2010In this following
[code]...
in the query creation part,the evensQuery and num are not defined.....then how does it work Secondly,i read this from MSDN:In Visual Studio you can write LINQ queries in Visual Basic or C# with SQL Server databases, XML documents, ADO.NET Datasets, and any collection of objects that supports IEnumerable or the generic IEnumerable<(Of <(T>)>) interface Now how can i know whether the collection of objects supports IEnumerable<(Of <(T>)>) interface or not?
VS 2008 Linq 2 Entities Can't Add An Association
Mar 21, 2009I'm a bit of a n0ob to all this and I'm having trouble finding good resources on the net.What I'm trying to do is define a one-to-many relationship between two entities. I'm using the GUI tool in Visual Studio - and have created the tables in Microsoft SQL Server Management Studio.Basically, I have two tables....a 'Users' table and a 'Sites' table. A single user can have many sites associated with it.Users has a primary key of 'UID' and the Sites table as a primary key of 'Site_ID'.Sites also has a column 'UID' that should indicate which user that site is associated with.Anyway - it sounded pretty simple; but no matter what I attempt to do, I can't seem to get it to work. Mostly, I get validation errors - sometimes run-time errors, or sometimes, no actual data even though there should sites that match the UID of the user.I am able to connect and write LINQ against my Users table/pull down User objects - but can't seem to get it to know that the Sites are associated with the user.In the GUI - if I go to 'Add Association' and create a 1 to many link between Accounts and Sites - and Validate - I get an error saying, "Error1Error 11008: Association 'AccountsSites' is not mapped."
It seems like, when I try to make an association, it wants to link the 'Keys' of each entity.But U_ID and SITE_ID are the keys and, obviously, shouldn't match.If I click on the line it created in the GUI and I go to 'Table Mapping' I can see that it is trying to match those keys. Since I want it to match user_ids my first thought is to just make the U_ID the entity Key in the Sites entity but, of course, that's wrong because it would no longer allow a 1 to many relationship.
VS 2008 LINQ Get The Index Of Datagridview Row?
Apr 29, 2012vb
Dim CheckedRows = From dgv As DataGridViewRow In Me.DataGridView4.Rows _
Where dgv.Cells(0).Value = True _
Select New With {.a = dgv.Cells(1).Value, .b = dgv.Cells(2).Value}
my code above works fine but how to get the index of the row on which the checkbox is checked
VS 2008 LINQ Not Returning Results?
Mar 3, 2010So, I'm not really sure if I have this setup properly or not. This is my first attempt at utilizing LINQ and I am trying to return data directly from an XML file.Here is my XML structure:
<folder_list>
<folder lbl="_localhost" abs="C:\_localhostapache2triadhtdocs" unc="C:\_localhostapache2triadhtdocs" tag="default" />
<folder lbl="Programming" abs="D:\_prog" unc="D:\_prog" tag="default" />
<folder lbl="Anime" abs="D:Anime" unc="D:Anime" tag="default" />
[Code]...