Searching The Database Record Using LINQ

Aug 3, 2010

How can search record in my DataSet (fields: Name, Address, Phone#) for a certain name, given by user by clicking a combo box?

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Searching A Record In A Database Using .net?

May 1, 2009

i am using visual basic 2008 with as language. i have created an application in which i am using oracle 9i sql database. the table is admissioninfo in which the columns are rollno,feespaid,dept,sem,sec. i want to know how i can search a record i.e, rollno from the database through my program and the program will show feespaid,dept,sem,sec in the textboxes.

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Searching For A Record In Database?

Dec 29, 2009

I have two text boxes and want the users to be albe to serach through Access Database for a first or last name.but my search button is not working

Imports System.Data
Imports System.Data.OleDb
Private Sub frmEmployees_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles


View 7 Replies - Search A Record From Sql Database Searching By First Name?

Sep 8, 2009

i want to search a record from sql database searching by first name so im using a function in the data layer but it is not working

Public Function searchCustomer(ByVal custFname As String) As DataTable
Dim tabletdata As New DataTable
Dim conn As New SqlConnection(con_string)


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Searching Database To Find Record

Feb 3, 2011

I am trying to search a database to find a record. Here is my code.
Private Sub mnuFind_Click()
Dim strQuote As String
Dim strCriteria As String
Dim strText As String
txtWidth.Enabled = False
txtLength.Enabled = False
[Code] .....

The problem that I am having is when I run the code it returns nothing. I have even put in bad data and I don't even get a message Data not found.

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Searching For A Record From An Access Database?

Jun 11, 2011

Am working on a movie rental system in VB.NET, but there's a problem. I want a situation whereby the user will have the privilege to search for desired records by typing a search string, then hitting the search button. The results should be shown on a datagridview. Here's my code:

Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim MovieName As String


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Searching Database Using LINQ?

Oct 10, 2010

Searching Database using LINQ

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Add A Record To Database With LINQ?

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]...

View 1 Replies - Using LINQ And A Dropdownlist To Enter A New Record Into An SQL Database

Apr 19, 2012

Our remit is to make a Veterinary Surgery Booking System.

I have an page that has 4 fields, one of the fields is populated on page load as per the vb code below.

I'm trying to get the selected value (or text) of the dropdownlist control and use it as the value for the first field in the record however every time I select the second or third value in the dropdownlist and click the submit button the new record that is created is inserting the first value in the dropdownlist.[CODE...]

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Delete A Record By Searching That Record In Two Tables?

Jun 6, 2011

i have one textbox ,this textbox contains a number ,i want to delete a record by searching that number in two tables Table1 and Table2,the record may present in Table1 or Table2 ,so it should check both the Tables ,if it is found in table1 it should delete or else from table 2 it should delete.

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Code To Update A Record After Searching ?

Aug 16, 2010

I am using this code to update a record after searching but it gives me error

here is my code


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Quering Record - Check A Record In Database Before Inserting A New Record

Aug 9, 2010

I am trying to check a record in database before inerting a new record here is my code but problem is when i enter a names first alphabet it imediatly populate massage. i want to check it after entering whole name

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Dim cnString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" &


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Searching A Record Based On Month And Date In DataGridView?

Dec 15, 2011

Am using Visual studio 2005 with MS Access. I have a Datagridview with a date column in format 11/23/2011(Month/Date/Year).

Now i want to know how 'search criteria based on particular month and date'.

For Example if select 'Nov' as a month from combobox and click on search button, only November month details should be displayed.

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Searching A Set Of Data With Multiple Terms Using Linq?

Mar 17, 2010

I'm in the process of moving from ADO.NET to Linq. The application is a directory search program to look people up. The users are allowed to type the search criteria into a single textbox. They can separate each term with a space, or wrap a phrase in quotes such as "park place" to indicate that it is one term.

Behind the scenes the data comes from a XML file that has about 90,000 records in it and is about 65 megs. I load the data into a DataTable and then use the .Select method with a SQL query to perform the searches. The query I pass is built from the search terms the user passed. I split the string from the textbox into an array using a regular expression that will split everything into a separate element that has a space in it. However if there are quotes around a phrase, that becomes it's own element in the array. I then end up with a single dimension array with x number of elements, which I iterate over to build a long query.

I then build the search expression below:

query = query & _
"((userid LIKE '" & tempstr & "%') OR " & _
"(nickname LIKE '" & tempstr & "%') OR " & _


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String Searching In Linq To Entity Framework?

Mar 2, 2010

I am wanting to create a Where statement within my Linq statement, but have hit a bit of a stumbling block.I would like to split a string value, and then search using each array item in the Where clause.In my normal Sql statement I would simply loop through the string array, and build up there Where clause then either pass this to a stored procedure, or just execute the sql string. But am not sure how to do this with Linq to Entity? ( From o In db.TableName Where o.Field LIKE Stringvalue Select o ).ToList()

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Searching Record Using A Combobox To Display The Data In A Textbox Or Lablelbox

Jun 11, 2011

I have a problem searching my record using a Combobox to display the data in a textbox or lablelbox

txtUsername.text = rs!username
lblAddress.text = rs!Address

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Database Control Binding - Create A Record Add Information To It And Click On Next Record

Nov 15, 2009

I have a problem with my program, and it's really bad because I need to burn it to disk within 12 hours and I can't get it to work: If I create a record, add information to it and click on Next Record, the ID, Status and Notes boxes content will change but the rest of the controls contents are carried over to the next record and I don't know why or how. It was working perfectly but now it stopped and I never done anything.

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Display A Record From Database And Also The Picture For That Record In A .rdlc Report?

May 23, 2010

I have records in a database. Each record has a Picture path in it eg. "C:\Pics\Image1.jpg". I would like to display a record from my database and also the picture for that record, in a .rdlc report in vb .net 2008. i have succeded in displaying the record but just can't get the picture to show. I am using an Imagebox in the report.

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Access Database Query : Get The Old Record To Be Added To The New Record?

Apr 15, 2012

I have a access database with these columns. USER_ID,COUNT,TIMES

Let say the current record is this:

Now I want to updated the current count record and times, but before updating I want the old record to be added to the new record. What should be my query?

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SQL - How To Insert New Record Through LINQ

Aug 1, 2011

I am trying to insert a new record though linq. I am able to update and read data with out any problem, but how to just inset a new record. Here is a start of my function.

Public Function AddAddressInfo(ByVal objdeptGUID As String, ByVal objGEOCode As String, ByVal objArressCommonName As String, ByVal objStreetAddress As String, ByVal objAddressNotes As String, ByVal objIsPublic As Boolean, ByVal objSesionToken As String)
''#Check of Token is good
If CheckToken(objSesionToken, objdeptGUID) = False Then
Return "Error"
End If
[Code] .....

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View The Next Record And Previous Record In The Database?

Sep 21, 2011

how to view the next record and previous record in the database.? just like in the picture below.? what condition should we use.?

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.net - Update Students Table Record Using LINQ To SQL?

Aug 22, 2011

Im trying to update my Students table record using LINQ to SQL. The problem is when one of the Properties of the object changed and 'PropertyChanging' Event is fired using 'SendPropertyChanging()' method.

student_id is a PK
data types are matched

Here is the full ArgumentException:

GenericArguments[2], 'System.String', on
violates the constraint of type 'V2'.


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Adding Name And Score Record - Insert With LINQ

Apr 22, 2010

What I have is a database in a Windows Form (via tableAdapters etc., basically the default stuff VS adds). What I need to do, is add a very simple record of a name and score (the "place" is an auto-number). I have not even been able to tackle sorting the table, because I can not even figure out how to insert...

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Loading Record By Predicate / Lambda Via LINQ

Jan 12, 2011

I am pretty confused about lambdas. What I am trying to do here is write a function that will return an object from a certain table with a certain criteria. So lets say I can write:
function GetRecord(TableName as string,Criteria as string) as object
'do the linq-stuff
end function

Now I don't care if the parameters are strings or lambdas or whatever, but the end result must be that at runtime I don't know which table and which criteria will be used. As sometimes I need to get a customer record by email and sometimes a product by id etc. If possible I would prefer returning a list of matching objects and then I would just use .firstordefault when I want 1 (such as by id...).

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Pass Content To Specific Record In XML Using LINQ?

Nov 14, 2009

I am using the following line of LINQ to drill down into an element. Is it possible to expands this code to drill further down so that I can add content to the <population> element in "Test2". I want to be able to do somthing like element.SetValue(1000000). However I need to expand the code below so that I can pass the entire query results into the variable called "element"'

Dim eles = From c In doc.Descendants("File") _
Where c.Attribute("Name").Value = "Test2" _
Select c


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Return Max Record Count By Grouping In Linq?

Nov 9, 2011

I'm very new to linq and I'm trying to come up with a linq query against a dataset that will return a max count value based on grouping records.[code]...

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DB/Reporting :: Display Single Record From Linq Query?

Mar 24, 2011

For 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.

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LINQ Insert Child Record Specified Cast Is Not Valid?

Mar 10, 2011

ok I have a weird issue. I created a master record in the master table and then a record in the detail table. when creating the detail record i get a Specified cast is not valid error. Now another weird thing is that once I create the master record I can't query and verify it was created. But when i got to sql management studio I can see the master record. Below is my two procedures and the table definitions. Master table primary key is INVNUM child table primary key it INVLIN_ID and the reference key is INVNUM

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LINQ VB To Read Many Columns (or Fields) In One Row Record Data?

Oct 1, 2010

The LINQ VB code below is to read the first record data for database table
ProductTable that has 3 colounms (or 3 fields):

TableCol1, TableCol2, TableCol3. The reading data is stored at variable
'-------start LINQ VB code in Visual Studio Web Developer 2008-------'
Dim MyArrayFirstRow


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DataBinding LINQ DataContext - Add A New Record Since The Textbox's Are Binded To An ISingleResult?

Aug 13, 2009

I have a LINQ to SQL DataContext with all my tables and all my stored procedures in it. Let me first start off by saying that we are upgrading our project from an access project to a WPF project. So in the Access project you could set a forms datasource to a stored procedure and edit and add new information. So in my WPF project on the page load I call my stored procedure to return an ISingleResult and then call a function to set the binding on every single textbox on the form. One is there an easier way to do this and two what if I want to add a new record since the textbox's are binded to an ISingleResult?

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