VS 2008 Updating Child Table Before Parent?

Jan 11, 2011

I have a situation where a database table is updated with records inside a loop. Every record in this table has a parent child relationship with another table. This child table is also updated subsequently inside the same loop.I am creating the datatable for Parent table and adding records inside the loop, but committing the records in the database (using SqlCommandBuilder) outside the loop only once.

Inside the loop I am also calling the function for updating records in the child table. Because the adaptor and datable objects are created inside the child table function, I need to commit records in child table inside the function only. So this happens before commit of parent table. Because there is a PK-FK constraint in the database, an error is generated.

Simplest solution would be to bring all code inside one function. But I don't want to do that. Besides this parent child relations can go upto any levels.

[Code]...

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Filter Parent / Child Table In Linq Query Based On Entities In Child Table?

Jul 9, 2010

I have a table (Projects) which is linked to projectVersions on projectID..projectVersions contains several columns on which I'd like to filter a returned project (and associated projectVersions) list. For example there is a "capacity" column and a "country" column. I am doing a filtered list of projects on one page and I'd like to include all projects where any one of the associated projectVersions has a capacity of 750ml and a country of "France" for example.It may be that a particular parameter is not set and so I pass a zero to indicate not to filter on that.I guess this needs some kind of subquery as when I try and do something like this: [code] it doesn't work as the "xxx" bit, being one-to-many, expects me to specify an item to get at the entities within and yet I want to query where ANY of the associated versions match one of the criteria.

Displaying And Updating Data In DataGridView With Parent Child Relation Using N-tier Architecture (2008)

Jun 16, 2009

I have recently built an N-Tier app using VB.Net 2008. The application is based on Beth Massi's tutorial at [URL] I am trying to incorporate a datagrridview control on a Parent form - one parent (father and mother) to many children. For example,

[Code]...

Creating DataRelation With Parent And Child Tables And Generating Xml With Subnodes For Child Table?

May 21, 2012

Dim obj_DataTable As New System.Data.DataTable("Category")
Dim obj_DataSet As New DataSet()
'Declaring the array of DataColum to hold the Primary Key Columns

[code].....

Refresh Table Adapter When I Have A Child Table Attached With Parent Table?

Dec 21, 2011

I have a data table whose one column is related to a column of another table. I have a listbox in a form which shows a column (which is sorted by another column value by ORDER clause) of the parent table and other columns are in textboxes. The child table is represented by a datagrid. When I add a new item in parent table and click save, the newly created item is listed at the bottom of the listbox violating my ORDER clause. When I wrote some codes to fill data again after updating, it shows an error message[code]...

C# - LINQ To SQL Join Two Tables To Select Parent Table Twice Based On Two Different Columns From Child Table?

Aug 23, 2010

I have two tables Employees and CafeLogs. Some employees can be cashiers and also customers at the Cafe shop.

Table structures:

Employees: EmployeeId(PK) , FirstName, LastName
CafeLogs: LogId (PK), CashierId, EmployeeId, Value, => CashierId and EmployeeId are the data from column EmployeeId of Empoyee table

Table relationship:

Employees 1:N CafeLogs (CashierId (FK))

[code]....

Right now I know how to select only LogId, Employee's name, and , Value, not with Cashier name yet.

Dim query = From log In db.CafeLogs _
Join emp In db.Employees On emp.EmployeeId Equals log.EmployeeId _
Select log.LogId, emp.FirsName, emp.LastName, log.Value

Show Parent Table And Child Table In Datagridview?

Jun 18, 2009

in DataSet ds I have "tbl1" as parent table and "tbl2" as childtablehow to show both table in datagridview if column id in "tbl1" related to column headerId in "tbl2" ?

Viewing Child Table With Parent Table In Datagrid?

Jun 17, 2009

I have a SQL Data Base. I have created a relation between these tables. Problem is when i drag and drop it on Data grid i get only Parent table columns but i want to sea them both like this.

- Parent Table Row
- Child Row 1
- Child Row 2

[code].....

Loop Through Child - Bind Textbox To Field Of Parent Table

Mar 22, 2010

First I have 2 tables, for example Customer and Orders, and in the database there is a foreign key relation between both. For clarity Orders have a foreign key field to the primary key of Customers, thus Customer is the parent and Orders is the child table of the relation. My application is a Windows Form application, and I add a dataset to the project, in which I drop the 2 tables, and the relations between the 2 tables is automatic added. Now I will om a form loop through the Orders table (witch is the Child table) and show in a textbox some fields of the Orders table and also the Name field of the related record of the customers table. Regarding binding a textbox fo a Orders field I do it this way,

Dim myDs As New DataSet1
Dim myAdpCustomer As New DataSet1TableAdapters.CustomerTableAdapter
Dim myAdpOrders As New DataSet1TableAdapters.OrdersTableAdapter
myAdpCustomer.Fill(myDs.Customers)
myAdpOrders.Fill(myDs.Orders)
Dim myBindingSource As New BindingSource
myBindingSource.DataSource = myDs.Orders
myBindingNavigator.BindingSource = myBindingSource
TextBox1.DataBindings.Add("Text", myBindingSource, myDs.Orders.OrderIDColumn.ColumnName)

But now I can't find how to bind a textbox to a field of the Customers table witch is the Parent table of the relation.

Showing Data From Child Table By Clicking On Parent Record?

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

Updating A Child Table Using Access Tables?

Mar 13, 2009

I am getting a System.Data.InvalidConstraintException" ForeignKeyConstraint CompanyPasswords requires the child key values(-1) to exist in the parent Table. When saving updates to the parent and child tables.My parent table consists of 3 columnsCompanyID (auto increment, pk)Company NameURLMy Child table consists of 4 columns PasswordID (auto increment, pk)CompanyID (fk)User NamePasswordHere is all the code on the form

[Code].....

Ensure That The Currently Selected Row ID In Parent Table Automatically Appears In Child Form?

Feb 26, 2009

How can I ensure that the currently selected row ID in Parent Table automatically appears in my child form when I create a new row in the Child Form.I am using VB 2008 Express I have a Stored Procedure for the chiled table called "Files" can I do it from there:-

ALTER PROCEDURE dbo.CreateFile
(
@FileName varchar(50),
@DateCreated varchar(50),

[code]....

Postgresql - Populate Tree View For Parent Child Relation In Same Table?

May 1, 2011

The database strutcure is:

Id Name ParentId
1 File NULL
2 Open 1
3 Save 1

[Code]....

I am using the database PostgreSQL.

Require Assistance Making A Menu From A Single Parent/Child Table?

Oct 25, 2010

I have a single table that holds my Categories

CatID, CatName, ParentID

I have often used this layout to show Root Categories where the ParentID IS NULL. I would like to be able to create a vertical Menu (using a repeater and an <UL><LI> that displays the Root Categories and ideally, a collapse panel that would expand with the subcategories. Given the above Table format, it is also easily possible to make the hierarchy unlimited.

how to make a single dataset that understands the Child relationship.

Updating Parent Form From Dataset After Editing In Child Form?

Aug 24, 2009

I have two forms....Mainform is filled with controls that are databound to a datasource.....then I have a child form that is used to edit data from parent form.......the data that is displayed on the child form uses the Filter() method of the binding source to display data only for the customer selected......

The child form has the standard OK and CANCEL buttons set up as dialog result.......after I edit the content in child form, the changes are displayed on the child form correctly......but when closing the child form and going back to the parent form the changes dont appear there unless I restart the application.....I also tried adding the tableadapter.update/fill method in the 'OK' dialog result event handler and it still doesnt work......

How can I make the changes take effect on the parent form without restarting the application?

Foreign Key Constraint Not Updating Child Table On Primary Key Change?

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.

Interface And Graphics :: MDI Parent / Child - Child To Check To See If It Is The Last Child Object Before Closing

Feb 18, 2011

Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.

VS 2008 Parent Child Combobox?

Nov 16, 2010

have a form with 3 comboboxes and 3 Bindingdource dropped on, Now I can manage to have the first dropdown box display a list of manufacturers ok then when one is selected to display the range of products made and be able to open a form etc based on that, but what I really want to do is in the 3rd combobox display a list of models of the product in combobox2... Is this possible?. I have spent hours trying to figure this out and looking on the net but all examples only point to 1 parent and 1 child..

.net - Parent/Child Relationships Failing When Getting Data From Parent Class With Multiple Forms Open?

Jun 24, 2009

I have a main form, and some sub forms, and each sub form can have some sub forms. When I have multiple sub forms open, and I try to get data from the parent form, it returns the data from the wrong parent form.For example I have two instances of Mainform.subform running. If I do something like this in a child form of one instance of the subform. It returns data from the other subform.

dim l = Mainform.subform.listofdata

Edit:I am using visual Studio 2008. Winforms, form designed using designer. In my mainform I am doing this

Protected Friend frmMain as Mainform
frmmain = new mainform

In frmMain I am doing this

Protected Friend frmsub as new Subform'
frmsub = new subform

[code]....

IDE :: VB 2008 Datagrid The Parent Child Hyperlink?

Jan 19, 2009

How can i write code to check if the hyperlink that would show the data for the child table has been clicked. When i try to use code such as currentcell.gettype it would simply say datagridcell but does not provide any more information?

VS 2008 Parent And Child Rows In The DataGridView?

Sep 16, 2010

In my DataGridView table i have one column called "Category".In this "Category" column values are like

3101,
3102,
3103,

[code].....

VS 2008 TreeViews - Parent And Child Nodes

Apr 25, 2010

I'm new to this Visual Basic stuff. I have TreeView under the name of TreeView1 and it has two Parent nodes, one is Library and the other is Store. Under Library and Store I have childnodes and thats were I'm stuck. For example under Store there is Downloads and Apptrackr.

What I want is when a user clicks on Apptrackr it runs this piece of code
WebBrowser1.Visible = true
DownloadsBrowser.Visible = false
And when the user clicks on Downloads it then does the opposite
WebBrowser1.Visible = false
DownloadsBrowser.Visible = true

VS 2008 Update Parent & Child With Relation

Aug 7, 2011

I am going to ask a dumb question. I want to update my tables (two). There is a one to many relation between them. I know how to update when only one table is update, but how do i update when there is many on the other side. My problem is that , if one of the records on the many should become redundant, how would i delete it in the update process. If only the content changes , it is not a problem, i know the data just gets written back to the tables, but if one of the child records is not delete, how would it work I need some clue on the SQL statement using OLEDB

Releasing A Child From A Parent Control Without Knowing The Parent(WPF)

Apr 10, 2010

I would like to know if there is some simple code to release a child control from it's parent control, without having to name the parent control. In pseudocode, I'm looking for something like this:

[Code]...

VS 2008 - Passing Data From WPF Parent To Child Form

Jan 27, 2010

In my WPF Form1 I have TextBlock1 that fill from AddressTableAdapter. To edit address user must click EditButton to open Form2 to perform changes. My problem is passing data to Form2 from Form1. In Form2 I have 3 TextBoxes Street, City, Zip, and StateComboBox. I try to code in Loaded procedure of Form2 like this and got error message:

Private Sub Form2Detail_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
Me.AddressTableAdapter.Fill(Me.AbcDataSet.Address)
Me.StreetTextBox = IIf(IsDBNull(AbcDataSet.Address.StreetColumn), "", AbcDataSet.Address.StreetColumn))
Me.StateComboBox = IIf(IsDBNull(AbcDataSet.Address.StateColumn), 0, AbcDataSet.Address.StateColumn))
End Sub

VS 2008 - Show Child Form In MDI Parent Taskbar?

Mar 30, 2012

I have developed vb.net application and have one main form with isMdiContainer property true. It has one Menustrip control docking on top of the form and StatusStrip docking on bottom of the scrren. When User click on any menu item it opens new form or if already opened, show it. My application allow to open multiple child forms opened at same time and all forms StartPosition is set to CenterScreen. My problem is becuase all forms are in cetenr it ovelaps each other and user wouldn't know which form(menu option) is opend. I would like to see all opened forms in different tabs (like in windows taskbar) in bottom of MDI parent form.

VS 2008 : Adding Parent And Child Nodes To TreeView?

Oct 31, 2010

I am not sure I am getting the concept of referencing nodes in a treeview. When I hard-code nodes like:

tnParentNode = New TreeNode("ABC")
tvReports.Nodes.Add(tnParentNode)
tnParentNode = New TreeNode("Some Other Company")

[code]....

I get two parent nodes and one child off Some Other Company. However, when I pull information from a couple of tables to set up the parent and then the child nodes, I only get the parent nodes.So I pull the main parent nodes from one table and the child nodes from another table.This code pulls the parent nodes without any problem:

strSQLText = "SELECT lID, sCatName FROM Category ORDER BY iSortOrder DESC"
reader = GetReader(strSQLText)
While reader.Read

[code]....

But this does not add the child nodes. I am assuming it is because of the first line in the above reader.read while loop. I must not be referencing the proper parent node but I am not sure how to do it.

Bind Child/Parent Instead Of Parent/Child?

Apr 28, 2009

Applications_Type is a lookup table for Applications.What I am trying to do is provide a drop down list of applications and a label that displays the selected application type.[code]...

Insert SQL 2008 Parent And Child Rows In A Single Transaction?

Nov 13, 2010

First, a little background (greatly simplified): I have two classes, one called Entity and one called Item which a subclass of Entity. They each store their individual properties in seperate SQL 2008 tables using TableAdapters generated by a strongly typed DataSet. The Entity class has a Save() method that looks like this:

Public Sub Save()
entityTableAdapter.Update(entityRow)
End Sub

[Code]....

Indeed, the SQL table does not contain a row in the Entity table with the necessary ID at this point because the transaction is not complete.

My goal is to prevent the Entity record from being inserted if inserting the Item record fails. I could write code to delete the Entity record again, but this does not seem very elegant to me...

VS 2008 - Implement The Mdi Parent / Child Associations Rather Than To Go And Declare Them Each One Individually

Aug 24, 2009

I have been developing an application for quite some time now. I have decided to create an mdi parent form to hold all the windows I have done so far. Is there an easy way to implement the mdi parent/ child associations rather than to go and declare them each one individually.

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