Retrieve Data From A Datagridview Loaded With Data From A Linq Database
Apr 9, 2010
I have three tables in SQL server which I would like to show and access on a form. Table 1 contains account data, address, contact details etc. Table two contains data attached to a Person, tel no , Mobile no, Email etc. Table three contains details on what awards the person holds, i.e. one person can hold several awards.
Therefore I have a one many relationship between the first two tables and a one many relationship between the second two tables. This is set up in SQL
The first two tables are shown on a form, table 1 via a set of text boxes, table 2 via a datagrid control.
I would like the functionality whereby I could select a row in the datagrid showing the persons name and find the Persons_ID number then use that as a filter to a second datagrid view so that only the selected persons awards show in the datagrid.
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Feb 2, 2010
I have a database that dynamically loads from Access into a datagridview. I have to enter data manually into one column in this datagridview. I need to be able to perform calculations to this data, for example I need to sum the data in this column, sqaure it and substract it from individual sqaures of the data in the cells. I should be able to sum it sum(22,33,44,53,67,23)^2-sum(22^2,33^2,...23^2). The number of columns keep changing depending on the database I choose to load, so I need to code this dynamically too. I am not really a VB person. I did the same in excel using Visual Basic and I am trying to do it in this Visual Basic environment.I built a tool in excel(VBA) that do some statistical calculations and data analysis and I am trying to build the same in Visual Basic.
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Jun 23, 2012
i have datagridview,listview, and database..how to retrieve the data from database into datagridview by using item in listview?
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Dec 10, 2009
I'm using a LinqDataSource to populate a basic GridView in ASP.NET. The user has the ability to filter the results, so I use a few WhereParameters and the Where within the LinqDataSource.My client has requested an option to export the filtered results to a file. Easy enough to pipe the data into a file, but I would prefer not to rewrite all the where clauses in the codebehind. I would simply like to extract the full set of results, preferably by using the already configure LinqDataSource.When using LinqDataSource's OnSelect method, the e.Result has the data I'm after, but my GridView PageSize is set to 20, which means that the LinqDataSource (rightly so) only fetches the first 20 records.Is there anyway to get hold of the entire data set?
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Mar 19, 2009
i have a textbox that i want to format the value and i placed it in the Validated event.. it works ok when a user enters a value but when data is being loaded from database, it doesn't format.
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Nov 26, 2010
I am trying to create a LINQ query statement that retrieve intersecting data from 3 datatables (dt, dt1, dt2). My first attempt to do so with the following LINQ query statement was successful: [code] However in my design, I would need the LINQ query statement to be dynamically generated, because I want a user to be able to retrieve intersecting data entries from VARIABLE number of datatables. In this case, the first option is not as good as the "INTERSECT" query operator, with which I can just easily connect each SQL query statement with a "INTERSECT" operator. The problem is that my second attempt using the "intersect" operator fails, and after many trials and errors I still can't get it to work. [code]
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Jul 14, 2009
I am trying to retrieve data to a textbox from a datagridview. I have Tabcontrol with two tabs naming Data Sheet View and Form View. The datagridview is in Data Sheet view while my textboxes are in Form View.
Al I want is that everytime I click on the data in datagridview, it would display in textbox in form view.
Here are some of my code:
Dim ret As String = "select * from newstudent_tbl where USN='" & DataGridView1.SelectedCells(0).ToString & "'"
cmd.CommandText = ret
[Code]......
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Jun 8, 2011
im doing an employee attendance monitoring system, and i need to have a search feature which shows an employee attendance record in a given range of dates
example[code...]
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Mar 17, 2010
I have a data grid view control which i populate using a random access file. What i want to do is when a user clicks on a cell, i want the data held in all the cells in the particular row to be used to populate some textboxes. i have searched everywhere and they all use sql databases.
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May 26, 2010
I encounter problem trying to retrieve Data from Excel to fill DataGridView. The BA specification is to open up Excel Spreadsheet to loop though the row and retrieve by row, column and fill DataGridVew.
These lines of coding generated this error message
If objSheet.Cells(excelRow, 0) = "" Then <-- error Exception From HRESULT : 0x800A03EC
bolFlag = False
End If
[Code].....
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Feb 26, 2009
how to retrieve data's from MS Access table using datagridview?
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Jan 17, 2011
I have a report made in Crystal Reports XI. The report is generated and exported to PDF in visual basic script using COM interface. Generally everything is running smoothly, but in one case generation breaks with error: Failed to retrieve data from the database. Details: [Database Vendor Code 9421]
Database used is MSSQL 2005 connected over ODBC to CR XI. When I am opening report with exactly the same parameters in Designer, everything works fine.It looks like it is data related, but it is hard to trace since the whole report is pretty sophisticated. Anyway I spent half a day on crawling over Dr. Google and it seems that he has no clue what might be an issue.
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Sep 1, 2009
I execute a stored procedure which updates data. Is there a way to refresh the data in a datagridview to match the database's data.
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Jul 27, 2009
I have two data tables within my data set that are loaded onto my form on form_load using statements written in code (not the designer. When I change a value for the first table via a text box the change is made to the data set. But when I try the same for the second table, the change doesn't remain in the data set when I switch to a different company and come back. I query the second table using the primary key of the first table but no code is needed when I change the values for the first table so I don't understand why the same doesn't work for the second when I change a value via a data-bound text box....
Here is my code that initially binds the data:
'This is used to read our data from the data base
Public Sub Read_Data_SQL()
Call Clear_Bindings()
[CODE]...
Here is the code I call when the selected index of my company combo box changes to have the second table reflect that of the first:
'This sub populates any information contained in the Contact2 table
Private Sub Update_Contact_2()
Dim Company As String = cmbCompany.Text.Replace("'", "''")
[CODE]...
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Sep 21, 2011
we want to retrieve all data in our database but we dont know how to do it.. hmm.. we just use to retrieve data one by one.. its just by the search button.
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Mar 7, 2010
Note: Combobox contains company name, then when i select one of the company in the list, the information on the table connected to to the company table like purchase order table info will appear on the datagridview.
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May 31, 2011
I used to be a web developer in vb.net 2008 , now i get involved in some projects with application development. Which is the right way i mean the proffesional way to connect to database , syntax a query and bind the result to datagrid?I see 2 ways , the first is using the wizard i mean drag to the form the databinder from the toolbox and follow the wizard step by step , the second way is the same way i used in web development i get the connection string from app.config , syntax a query inside my code and follow manually steps to retrive the data from a database.which way to use for a large application projects?
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Jun 5, 2011
I write this code to connect to sql database and to retrieve data but its not working
Imports System.Data.SqlClient
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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Oct 20, 2010
How can i retrieve data from sql database and put the values in textboxes?
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Oct 6, 2009
i need the complete code for retreiving the data from a database.. i m coding in visual web developer and using VB as coding language. I m using SQL SERVER as database handler.
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Jul 5, 2011
how i can retrive data from database system(access) and then present it to the user in the form of list box ,so i can select one of them? *retrieved data= only one column from the table
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Nov 25, 2011
can only retrieve data from database one time with read code:
While reader.Read
RichTextBox1.AppendText(reader.GetString(0))
End While
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Aug 23, 2011
trying to put data from a database into a combobox. i've tried different way, still not working.
Public Sub SaveNames(ByRef SQLStatement As String)
Dim cmd As MySqlCommand = New MySqlCommand
With cmd
[code]....
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Jun 10, 2011
I'm doing a project in vb.net back-end is MSACCESS...
I don't know how to store data from COMBO BOX and to RETRIVE data from database to COMBO BOX.[code]...
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Jul 24, 2011
I am trying to retrieve data from one column of my database. here is my code
Me.Student_DatabaseTableAdapter.FillBySID(Me.Student_DatabaseDataSet.Student_Database, SID)
Error 1 Too many arguments to 'Public Overridable Overloads Function FillBySID(dataTable As Student_DatabaseDataSet.Student_DatabaseDataTable) As Integer'
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Jul 25, 2011
I am trying to retrieve data from one column of my database.
here is my code
Me.Student_DatabaseTableAdapter.FillBySID(Me.Student_DatabaseDataSet.Student_Database, SID)
Error 1 Too many arguments to 'Public Overridable Overloads Function FillBySID(dataTable As Student_DatabaseDataSet.Student_DatabaseDataTable) As Integer'
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Jul 28, 2009
I had the following code to retrieve the data from database:
[Code]...
But from the database, it looks nicely and align nicely.For example, all the amount will align nicely to the header "Amount". May I know is there any solution to make sure that the data that display on the web follow the alignment from database?Because in the database, the data is separate nicely with space and align nicely.Actually the above data are all store in the same column in database. How can I make sure the data being retrieve follow the alignment of database?
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Oct 29, 2011
This is my coding in vb.net. I have used two database (1) party (2)partydup. Structure of the tables: party table: fields :code, name1,add1,add2 etc. partyduptable: fields: code, description
In both tables i have common field ("code"). I tried to retrieve the value of "description" field from partydup table when the "code" field in both the tables are same. I run the below coding but it is showing the error as "No data exists for the row/column". But i have a record which contains the code field value as 123 in both the tables. Still it is showing the error.
Imports System.IO
Imports System.Data.OleDb
Imports System.Data.OleDb.OleDbConnection
[Code].....
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Dec 14, 2009
Subj.There is no knowledge that is not power.
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Jul 22, 2011
I'm currently working on an application written in VB.net using Visual Studio. The app retrieves and updates data from a remote database. While debugging, I updated a particular row in the database and after messing around a bit managed to crash the app. Since then, whenever I fetch that particular row, the data that was previously updated continues to be retreived - regardless of what is actually in the database.
All other rows properly reflect the data in the database and are capable of being updated through the application as they should. However with this one particular row it continues to retrieve outdated data and locks up the application when I attempt to perform an update. Does Visual Studio create some sort of local copy of the database which was perhaps corrupted?
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