Delete Foreign Key Record From Child Data Grid?
Nov 28, 2010
I have master detail form with two datagrids. customer and order detail.I have relationship between customer and order detail on customerid.How do i delete record from order detail when i click delete button to delete record from customer datagrid.Here is the code so far.
Private Sub btndelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btndelete.Click
'Me.CustomerTableAdapter.Fill(Me.CustomerDataSet.Customer)
[code]......
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Feb 21, 2010
While I've previously many years of relational databases and procedural languages, I'm stumbling with Visual Basic. In this problem, the simple situation is that I have two files, parent and child. The primary key of the parent file (Area file) is linked by a relation to one of the two fields that makes up the primary key in the child file (Project file) (unique key is formed from 'area' and 'project'). I have the default table adapters created on both files. I have created two maintenance forms showing one each of the two files in datagrid view format.I can create some records in the Parent (Area) file, but when I try to create a record in the child (Project) file, using one of the valid key values from the Area file, I get the 'ForeignKeyConstraint [relation name] requires the child key values [actual value] to exist in the parent table' which I'm absolutely definitely sure it does.
I haven't done any actual coding for those two maintenance forms, just dragged-and-dropped the files from the data sources screen onto separate forms so it creates the controls itself. But I can't work out, if it already knows the data does exist because I can load it back in to the Area maintence form, why it can't check itself to find out the record does exist. Why does it think the record from the parent record doesn't exist? It does exactly the same thing, whether or not the database is in access or SQL Server Express. I have all the latest updates.
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Feb 15, 2012
i have a form which search data in specific date and show result in the datagridview, what i want is that when delete button is clicked all datas that in the datagridview will be deleted sameway in the database
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Mar 15, 2012
i've a problem with deleting record from datagrid. i have few columns in my datatable and all publish on to a grid and under "ID" column there are id nos and they are "NOT" unique. user able to search using this "ID" no. problem comes in deleting records since the "ID" is not unique. if i use following command to delete; it deletes all the records which are having same "ID". but i want to delete only the current row records,
sqlDelete = "DELETE * FROM table1 WHERE ID ='" & form1.dgv1.CurrentRow.Cells(0).Value.ToString & "'"
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Jul 14, 2011
is my coding and i want delete the record from grid view and data base also .. but i can only delete from grid view
this my Module coding
Imports System.Data.OleDb
Module Module1
Public con As New OleDbConnection
[Code]....
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Dec 3, 2011
I use This Code To Save Data in Table First I delete record Then Insert record
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Oct 6, 2011
how to display data in grid view using code that you can edit, update and delete the data...do i need to have a stored proc in this?
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Jul 3, 2011
Here is the code i am using to save record from data grid to db
Try
For r = 0 To DataGridView1.RowCount - 2 ' Why RowCount-2?
For Each cell As DataGridViewCell In DataGridView1.Rows(r).Cells
[Code]......
Error is
"Conversion Form type dbnull to Type date is not valid" Please view the attached image what should i do to remove this error.
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Jul 28, 2010
I am displaying a table with a Report Viewer control. The table contains a foreign key to a child table, and I want to display the value from the child table for the particular foreign key.How do I do that? Using VB in vs2010.(Eg.The parent table contains a field called BrokerID, which is a key to the Brokers table.I want to display the value of BrokerName from the Brokers table associated with the BrokerID from in my Report).
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Mar 12, 2010
I m workin on vb.net ado.net oledb, I have also added datagrid Control to my form
for retriving database from .Mdb file i used following code
Code:
'decleared Name Space
Imports System.Data.OleDb
[Code]....
or when i click any record in datagrid, then the current record of dataset also should move to clicked record of datagrid, so that i also may see datagrid's clicked record in textboxes
in short i want to use default feature of vb6's ado control, when we bind datagrid with ado control, it worked autometically, both data grid and adodc wer connected each other at a time, so that moving next record also apears in datagrid.
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Oct 15, 2011
im having problem with my simple library i dont know what is the code to search a record in the data grid im ung adodc any one kindly help with my project only the search code.. is my problem so how to search in the data grid? url...
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Jul 8, 2011
How can i delete selected row from data grid using delete button [code]...
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Jun 8, 2011
save, edit and delete files in the data grid.
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Mar 11, 2010
i have a prob that i have a gridview on the parent window. when i open a child window using showmodaldialog, i enter some data in the textboxes. now when i close my child window i want to display the text entered by me in the grid. i want to know how can i access the grid in child window
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Jun 14, 2012
I'm currently trying to create a function to parse error messages to make them more helpful for the end user. Currently I'm working with SQLServer and VB.NET.
Right now I'm raising error 547 which looks like this:
DELETE statement conflicted with COLUMN REFERENCE
constraint Constraint Name. The conflict occurred
in database 'Database Name', table 'Table Name',
[Code].....
I'm able to pull every piece of information I need from the error message except the name of the parentTable. I've already determined that the SqlException doesn't store the statement that caused the exception, and as far as I can tell it doesn't store information about the name of the parent table, only the table that is trying to reference it.
Is there an easy way to get the name of the parentTable?
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Apr 4, 2009
Instead of connecting to database,I create datacolumns of two data tables.assign foregin key constraints and primary keys to the columns.Add these datatables to dataset and create relationship between them.Now by using RowFilter property,how to display the child table in a datagrid by clicking on parent record in another datagrid?Accept and Award Points Accept as Solution
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Jul 20, 2009
I am using a number of tables on my application and two of which have a foreign key constraint I have set between them. When I change the account number on the main table via a combo box all of the relevant information for that table on the form is updated accordingly. However, the child table which has a foreign key reference to the Account Number of the main table is not updated when the acocunt number is changed. I have set the update to cascade in the references but still am having issues.
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Apr 15, 2012
Want to know how to create a exception handler if say you have a form that has a foregin key in it, how does one put an exception handler to prevent the operation of this producing a VB.NET Error when i want to delete a record?
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Mar 22, 2009
Working on Access 2007 and Visual Studio 2008, i already connected my database to the application and can see the data on datagrids and can add or edit or delete records, the problem is that those changes do not go to the database, so when i close and reopen the application, i found the old data as it was before. Note: i used the wizard to add the connection, not the code.
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Apr 24, 2009
I would like to have a pop up messagebox that asks users for confirmation before deleting a record in datagridview and if the record is a foreign key to another table, another messagebox will appear and warns users saying" before you can delete this record, make sure you remove all the related records" I have tried but I don't know how to complete it.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.StaffTableAdapter.Fill(Me.StaffDBDataSet.Staff)
BindingNavigator1.DeleteItem = Nothing
End Sub
[code]....
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May 27, 2011
Visual Studio Pro 2010 Win 7 64 bit running bootstrapped to a MacBook Pro i5 (blasphemer!!!) works really well though!!New to vb.net, have used vb6 for several years and finding the transition interesting to say the least.I have an access database with a vb.net front end all auto bound by the connection and binding wizards (I know, I know...) Not too complicated, but a simple 2 table related db. On the form the parent table shows customer details with the child table related and displayed by datagrid. I have a field in the child table for images and I have figured out how to store and retrieve images to the db. I am using the datagrid.rowheadermouseclick event to reload the picturebox on the main form as I click down the child table datagrid. Now I need to be able to click the bindingnavigator, go to the next record and have the program reload the image for the next child record. The problem is I'm trying to use an event from either the datagrid or bindingnavigator to reload the picturebox in the child table after moving to the next record, but all of the events I am trying are firing before the next record is moved to and therefor the logic I'm using to retrieve the image from the db is not working.
Anyone with an idea on how to move to the next record and then run my logic to populate the picturebox? What events might I use that fire after the next record has been populated? I know this is probably not that hard, but I have been racking my brain all day now.
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Jan 5, 2012
I have a javascript file that contains the function for calling the confirmation delete window, the code used is similar to the following:
function Delete()
{
confirm('Delete this user');
[code].....
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May 13, 2011
I'd like to create code for my datagrid view to be able to delete a row by first clicking the record selector column then pressing delete. Seems like some standard stuff but really difficult to create in VB 2005.
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Feb 9, 2011
Basically, I am making a booking system. On one of the forms, you can: Add, Edit and Delete a record by using the selected index. I can do the Add and Edit part fine but some problems are occuring when I try to delete it. What I'm trying to do when deleting is, copy all the records except the selected one and then copy it back into the original file again.
[Code]...
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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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Mar 26, 2011
when i try to delete a row . always restricting to delete on certain Table table.( DELETE ERROR tble_tombstone) message comes up.
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Apr 1, 2011
I want to delete record from GridView.Before to this ask for confirmation like "Are you sure to delete?"I used command field in GridView, [code] I wrote a function in javascript. [code] How I will call this on delete click.
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Jan 16, 2012
How to insert multiple data into mssql without using loop?i'm developing a clinic management system, while doctor may give few medicines to patient,therefore i hope inside my database,the data will look like [code]
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Mar 10, 2009
I am not particular with the database approach of Foreign Key a manner wherein a data related to another data. Table1 > Relations > Table2 How to make a foreign key and how to use that in coding ?
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Mar 17, 2011
I have a header table and a related details table with a one-to-many relationship from master to details.I understand that I will have problems saving details if the master data isn't already there, and I've been working around this. (VS 2008, SQL Express 2008, app is running on XP)
I've been getting around this by checking if there's any detail data on the save click event and warning the user that they need to save the master first before adding details.So the user then removes the detail, clicks save, and then adds the details and clicks save again. Although not good, that's been working OK, but now I need to make the details mandatory. So at the moment they can add a new record, save it and no details.What I would really like to do is to save everything at once. I saw a related post that said I needed to use a transaction, Is that the best approach? Or is there a way to save the master first then the related details all when the save button is pressed?
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