C# - Using LINQ To SQL To Search Entire Database?
Jul 7, 2010
Is it possible with LINQ to SQL to search the entire database (obviously only the parts that are mapped in the .dbml file) for a string match? I'm trying to write a function that will take a string of "Search Term" and search all mapped entities and return a List(Of Object) that can contain a mixture of entities i.e. if I have a table "Foo" and table "Bar" and search for "wibble", if there is a row in "Foo" and one in "Bar" that contain "wibble" i would like to return a List(Of Object) that contains a "Foo" object and a "Bar" object.
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Sep 11, 2009
i need to search any text in my entire database and get the result in my dataset. my database is in ms-access. i have written the following function for the same:
Dim con As OleDbConnection
Dim ada As OleDbDataAdapter
Dim ds As DataSet
[Code].....
the query written herein works fine if you copy and run it in access so i guess it is correct.
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Jul 15, 2009
Search Button To Access Entire Database? [code]...
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Aug 13, 2011
this code get the data from the sql where the name = @word which is the variablecontaining the word to search for my problem is i want to check all the table columns not only one column ? is it doable ?
Public Function Search(ByVal word As String) As DataTable
Dim Dt As New DataTable
Dim Adp As New SqlDataAdapter
[code].....
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Aug 4, 2011
I am in the process of creating a program, using Visual Basic Express, for a physics professor who has recently had to rename all 1500 questions for his course. I created a database that has the old names, new names, and the entire contents of each question. The program seemed an easy enough idea, but has proved to be very difficult for me. I am new to programming (this is only my third go at it) and have searched for an answer to my problem for at least 20 hours, and have yet to find anything that will work for what I need.
What I would like is to have a text box in which he can type in a keyword (such as "Sun", "ISS", "Force", etc) and for the program to search throughout the entire "questioncontents" column and pull out any questions that contain those words into the datagrid. As of yet the closest I have gotten is for it to search the first word of the column, which is not very useful since most of them start with "The". I had also thought of creating several keyword columns and then just having it search through those, but I couldn't figure out how to apply the filter to multiple columns.
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Apr 4, 2012
I understand how to find a user using the exact LDAP url
LDAP://domain/CN=Username,OU=Users,DC=domain,DC=com
but what if I need to find a user without looking in the particular OU. How do I search the entire domain?
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Jun 29, 2011
I need to mdify the code below to capture all files in all directories and write them to a grid
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
get files from current directory
Dim Files = From file In My.Computer.FileSystem.GetFiles(CurDir)
[Code]...
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Jun 19, 2011
Can We make Search like feature using VB.Net? Search should look for files given in textbox in the selected drive(c:,D:,e,etc) or from drivelistbox.
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Mar 17, 2012
I work at a pawn shop, I made a program to compare prices at ebgames ca/com, im looking for a way to take the pre-owned price and put it into a textbox instead of rendering the entire page every search.This is what I got going now:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
WebBrowser1.Navigate("http://www.ebgames.ca/browse?nav=16k-" + TextBox1.Text)
[code]....
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Apr 17, 2012
I am looking for a VB.net book that strings me through the entire development process of an application (Prefered: WPF ,LINQ ,ADO). I have read a few books on OOP and VB.net with small code samples demonstrating the specific idea of the chapter.I think it would be really helpful if there was a book that programmed an entire application that uses a sql database (Northwind , Adventureworks).
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Jun 10, 2011
i have a form with textboxes such as First name, surname, phone number in and each row has an auto number assigned to it. that auto number is the customers reference number. basically i want to be able to enter a reference number into a text box and when a button is clicked i want to extract all the name and phone number from the database and put them into the relevant text boxes. how would i go about doing this?
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Feb 23, 2010
do i clear and entire database through the program?
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Sep 24, 2009
<?xml version='1.0' encoding='utf-8' ?>
<All>
<Customers>
[code].....
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Dec 28, 2009
I have a MS access database connected to a VB2008 developed software.
I want to make a search button to search through all the tables in the database.
how can I do this?
I want to link a field in table one to a field in table 2 in the database so that they are the same ( whenever I change what is in table 1 table 2 changes to the same automaticaly )
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Apr 15, 2011
I am trying to make a simple search method using sql to linq in visual studio. In my database, i have the fields "Firstname" and "Lastname", and my search string is "name". How can i make a simple linq query which searches both fields?
in plain SQL i would do something like this: "SELECT (Firstname + Lastname) as 'Fullname' FROM table WHERE Fullname LIKE '%searchstring%'
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May 17, 2012
Is there any way to create a button which basically clears a entire table in your database?
I was hoping to have 2 buttons, 1 to empty a table 1 to fill the same table again.The idea is to store a year long values, and at the end of the year delete all of those with a button.The other button i want to use to fill the same table again.Starting from 1st day of the year untill the last day of the year.
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Oct 14, 2009
Below the xml doc
<Root>
<Global>
</Global>
<local>
<section name="A">
<subsection name="A">
[Code] .....
Now I want the property1 whose section name="B" and subsection name="B" and innersection name="B" in one single query using linq to xml.
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Mar 10, 2011
Just when I was thinking that I had Linq To Xml sussed I'm faced with yet another error! I think if I was to understand the linq search process in general better I might have more success, so any good links regarding that are also welcome. To my problem however; using the code below:
[Code]...
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Jun 1, 2012
I'm trying to concatenate two fields in LINQ so that I can then filter with a keyword. I found a question posted here that I thought was my answer, but I'm getting 0 records back for some reason. This is supposed to return a JSON result for an autocomplete textbox (it works when I don't concatenate fields).
Here's my code:
[Code]...
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Mar 10, 2012
I am trying to query from search box using list of data and the linq I used is:data = (From k As BSPLib.ContactLib.Contact In data_org.Values Where k.stringdata Like "%" & Searchtxtbox.Text & "%" Select k.prime).ToListBut this is not working, I am getting no data at all. Data_org is a dictionary so I used the values; k.stringdata contains all the data that need to be searched. Searchtxtbox.text contains the user defined search item.I Tried with sqlmethods through linq, but sqlmethods does not exist for me, I tried with with Imported namespace yet the code is not showing sql methods, could you please provide a workable query or just tell me where I have gone wron
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Oct 29, 2009
So far I don't got problems searching elements for example , the next block of code will load the xml file and then will search descendants ("recordinfomation") which is a parent element in the XML file and returns child elements ("title", "aut_FirstName, "aut_LastName, and "xmllink") . My question is I would like to start my search at the root of the xml file and search all parent elements and not a specific one and return what I am returning in the following code. In another words search the whole document for specific child elements.
Dim XDoc As XElement = XElement.Load(MapPath("App_DataBookstore.xml"))
Dim elements = From row In XDoc.Descendants("recordinformtion") _
Where Regex.IsMatch(row.Element("title").Value, strfirstterm,
[Code].....
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Jul 23, 2010
I have a VB.NET search routine, part of which is provided, below, that checks all Text cells in a DataGridView for a given string (inclusive), using a basic set of nested loops to perform the search:
' Search for the first occurrence of the given string
For Each row As DataGridViewRow In dgvMembers.Rows
' Skip the new row
[Code].....
is there a way to replicate this behavior using LINQ? Basically I would like the query to select (or return) the first DataGridViewCell whose text contains the search string. I've done some tinkering with sub-queries and the like, but I'm still having trouble wrapping my brain around the concepts (too many years of writing T-SQL, I guess).
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Nov 23, 2011
Is there a way to check if a column contains all or any of an items in a list? Example "ABCDEFG" is my column value. "A" "C" "L" is my list stored in a list. I need to find rows that contains at least one item in my list. Then items that contains ALL the items in my list (a basic OR / AND search such as a SE would have)
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Mar 24, 2011
I am creating a mediaplayer / playlist creator tool that basically imports MP3 songs into playlists (grids). I'm looking to add search functionality where the user can search all open playlists (or a subset of the open playlists). A Playlist is basically a collection of AudioFiles, where an AudioFile is a class that holds the filename of the MP3 file and then exposes the tags (Title, Artist, Album, etc) in public properties.
The idea is that the user can search for a certain expression (for example "the"), and that he can then choose whether to search in the title, in the title and artist, in the title or artist, in the title, artist and/or album, etc. However, I'm having a hard time implementing this and also having it kind of dynamic.
At the moment I am simply gathering all the AudioFiles from the open playlists (or from the subset of playlists the user chooses) and then running a simple LINQ query to find those AudioFiles where the Title contains the search text. Then I display the resulting AudioFiles in a new playlist window:
[Code]....
In case the AND / OR distinguishing is too hard, I would be happy to start with just letting it default to 'OR', so that the user can check Title and Album for example. If he would then search for 'a' then all songs that contain 'a' in their title as well as all songs that contain 'a' in their album should be returned. I guess that makes it easier, but I still wouldn't know how to dynamically create the LINQ query.
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Apr 22, 2010
[Code]...
how to do this. kindly show me some sample code for this
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Apr 15, 2009
I've got the following ADO.NET Entity Framework Entity Data Model:I want to find all the Policyholders with both a Service of a given Id and also a Keyword of a given Status.
This LINQ Does Not Work:
Dim ServicesId As Integer = ...
Dim KeywordStatus As Integer = ...
Dim FoundPolicyholders = From p As Policyholder In db.PolicyholderSet.Include("Keywords").Include("Services") _
Where p.Services.Id = ServicesId _
And p.Keywords.Status = KeywordStatus _
Select p
The Where clause cannot search the p.Services and p.Keywords EntityCollections in that way.
[Code]...
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Apr 15, 2011
search the collection of a collection in my LINQ Where clause?
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Feb 3, 2009
I have created a database software in VB and i would like to add a search facility to it. how can i do that?i have done the search design in a form. it gives user options to select what they want to search from a drop down combo box.and i have a result button.i would like to know what kind of code will this button require to display the results.
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Mar 11, 2010
I need help to create a search button vb.net to search a access database that is binded in vb.net. I want to search for 2 items in the database and display then in the datagrid. the code i done is here. Dim da = New OleDb.OleDbDataAdapter()
[Code]...
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Mar 2, 2009
I have been utilizing Scott Gu's tutorials on LINQ to SQL to try to learn some LINQ. I have been able to view, retrieve, and update records but I am unable to write new records into the database (MSSQL). Scott starts getting into inserting rows in the fourth section of the set of tutorials. As you can see on that page (or may already know), in order to add a record you must do the following (VB.NET)[code]...
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