Updating Dataset Between Child Form In MDI Project?
Nov 26, 2011
I have a MDI app in development that uses parent-child datasets. My problem is when I update a dataset on one child form I then need to update the dataset on another child form. I know the dataset update has been commited to the source as when I reload the second child form the changed values are displayed.
[Code]...
Main.CarTableAdapter.Fill(Me.RCCarV2DataSet.Car)Unfortunately when I close the form that executes the above code the "Main" form which is still open should display the new values in the bound controls but it doesn't. The only way I can get the changes to display is to close and reload the "Main" form.
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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?
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Jan 25, 2012
I have a webpage with a form that is used to edit some object. This object contains a Collection of other objects defined like this: Public Overridable Property Employees As List(Of Employee)
On a form I can delete an employee, add a new one or modify existing one. When I click save new values are sent to the server. On a server I check if the user exists. If exists then I modify its values, if it does not exist then I add it. All employees that exist on the server and were not sent are marked as deleted (State changed to EntityState.Deleted). I try to use the following code (dbCollection = database entities, newCollection = collection sent from the form):
[Code]...
This code does not work, because changing to EntityState.Deleted removes the object from collection, and for each loop breaks, since the collection is modified...I know that I can overcome this problem by using a for loop or adding objects to delete to some other list first, but I hope maybe there is a pattern that would make my code nicer.
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Mar 15, 2010
This must be a common problem, so perhaps someone can point me to a Knowledgebase article. I've got a form that works fine in a completed project. It's a windows form that uses a dataset and tableadapter (which show in the tray below). Now I'm developing a different project that requires a very similar form. I want to "copy" that form into my new project, make some minor changes, and then save it under a new name.
[Code]...
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Jun 22, 2010
I have two Datagrids, One grid has all the customers garments on it with style number and contact length. The other grid has the users who have garment issued to them. the style number is in both grids. I need to loop through the users grid and say if the contract number is 1 from the first grid then the contract date on the second grid will be todays date + 365 days (year contract) I have looked at using a stored procedure and also a for each command but I am just getting stuck with it all. [Code]
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Dec 15, 2011
I have an issue when I place a label box in the MDI Parent form and then open a child form the label box highlighted in child form?
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Nov 17, 2011
I have a MenuStrip with File > New, Open, Save, Exit located in a parent form, and a RichTextBox located in a child form.The problem I'm running into is concerned with the destination of the file elected from "Open" and the save.When a user selects their file from "Open", I need it to open the child form and put the text into the RichTextBox.I also need the program to be able to "Save" from a child form, whether it's been brought up via "New" or "Open".
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May 5, 2012
I use a dbDataAdapter to populate a DataTable from an unlinked oracle database.I have a dbDataAdapter that I want to insert rows into an SQL Server table using SQLCommandBuilder.I have been trying all day to update the DataTable that references the SQL Server table with the data from the Oracle DataTable so that I can insert the rows.
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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].....
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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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Apr 10, 2011
i have created two forms A and B when button in form A is clicked B is invoked when B is running its not possible to work on A until i close form B. How can i work on A without closing B
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Apr 17, 2012
i have three forms
when i click button1 on form1=====> form2.showdialog()
then click button 1 on form2 =====> form3.showdialog
then click button 1 on form 3 =====>
[code].....
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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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May 12, 2011
I"m completely stumped. I've looked here[url]... Changed my connectionstring appropriately. My dataset is fills with data. The Excel file already exists, but has nothing but a Header row. I can't understand why the dataset can't push the values to Excel. The only thing it's doing is inserting a bunch of rows. There's nothing so far indicates something is wrong. [code]...
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Mar 29, 2011
[code]...
Dataset table not updating The reason why everything ends in 1, is because I have another instance running with similar names... so disregard that.
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Jul 16, 2010
Here's my code which is called on Form Load:
Public Sub PopulateSites()
Try
cn.Open()
Dim SQLCmd As New SqlCommand()[code].....
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Dec 20, 2010
I have a datagrid that I use to display data from a SQL 2000 table. I am trying to write back any changes the user makes to the datagrid data back to the original table but don't know the proper method to do this.
Here is the code that populates the datagrid:
Dim TheDatabase As System.Data.SqlClient.SqlConnection
Dim ConnectionString As String
Dim cmd3 As New SqlCommand
Dim Adp3 As New SqlDataAdapter
[Code]...
I could use some suggestions on how to code the write back command that will allow the user to change the data in the datagrid and have those changes be written back to my tAdjustment table.
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Jun 27, 2011
I am working on a program that uses an SQL database which in terms has a dataset .xsd which im using. I need to be able to update my dataset so it can reflect any changes made during run time. I am using the internal data binding that vb uses so I am not doing anything manually.
I fill a table adapter with information from the dataset and table with this snippet of code:
Me.biweeklyTableAdapter.Fill(Me.DDSPayRollDataSet.biweekly, biwk.valpay)
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Jan 20, 2012
I have a simple one-line dataset which exists on a form. I do not want to add additional lines or delete. I just want the user to be able to save if they need to. So I added the dataset, dragged the fields onto the form and deleted the unnecessary icons to have only a "save" icon. I also changed the property of the database to 'save if newer' but I am stumped as to why it is not saving. Every example I see looks so easy-peasy and when I do it, I get the following error:[code]The "save button" didn't have code when I dragged the bindingnavigator to my screen so I used the code in the video as a guide to structure mine and it should have worked. :/
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Jan 23, 2012
I have an Access Database in which I am trying to add a row through a dataset. I am able to add the record to the dataset but I can't write it to the live database.
Dim connectionString As String = _
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:extraTEST.accdb;Persist Security Info=False;"
[Code].....
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Nov 8, 2010
On a form i have several text boxes binded to a bindingsource and including a datagridviewI have populated the textboxes with database fields successfully and the datagridview displays the correct information.I have the following code to save the information to the database but i cannot get it to work. [code] I have tried many code examples here in order to save the data, none of which has worked.Can anyone please help me with this?
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Dec 11, 2009
I am using VB.NET 2008 Express. I had a project with a mdi parent and several child forms. On the child forms, I created a datagridview by dragging the necessary table from the dataset(s) from the data sources window.
Main form - PastorBase
Child form - IllustrationList
When I try to debug it, I run into several errors from the code of the IllustrationList.Designer.vb file in this section [Code] However, the moment I make any change to the control by modifying properties or simply resizing it on the form, my change in this code is lost. So I am repeatedly having to change these lines (there are about five per child form). I am uncertain of what I am doing wrong. Should the dataset, etc. be added to the parent form and then called from the child form? Is there some setting I need to change somewhere?
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Mar 11, 2010
I am having a problem updating an access database with new information from an updated dataset. the database consists of 4 columns: User_ID, Login_Name, Password, Access. The following code makes a connection to the database, fills a dataset with the data from the database, reads a txt file with user name and passwords, and should update the dataset and then the database. However, I keep getting an Syntax error on the INSERT INTO statement on the datest.Update(dsUser,"User") line. I have found multiple posts on here showing the correct syntax of how to update a database, but I can't seem to get it to work.
[Code]...
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Jun 12, 2011
so I was originally having problems even saving the data, but I can now get it to stay in the dataset, and when I switch to another page it stays there when I go back to it. Although when I close the form and reopen it, the changed data has not saved. I know that it is because I have only updated the dataset and not the database, so was hoping someone could give me pointers of how to approach it.
[Code]...
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Apr 11, 2011
I have added a SQL Server datasource through the wizard. I created my forms which were bound to the dataset. Is it possible to change the datasource and dataset names while updating the dataset the binding controls of the form?
For instance, Server 1 has DB1 and Server 2 has DB2 (DB1 & DB2 store the same information/tables). Is it possible to keep the forms and only update the binding information if I want the forms to use DB2?
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May 14, 2009
I have a dataset which is bind to a datagridview. When changes are made and that dataset is modified, i want to edit the dataset and update two datarow with WHO did the change and WHEN did the change occur.
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Dec 20, 2010
Public Class ExtendedDateTimePicker Inherits DateTimePicker
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May 5, 2010
For reasons that are beyond my control, I have three Projects. Projects A and B reference project C. Project A references project B so that it can open a large form in project B. I now need to open that large form from project C, but VB won't allow me to add a reference from C to B because that would create a circular dependency. I found a way around it, though. I created a Timer in A, and when I opened C from A, I passed in that timer. When the user performs a certain action, I enable the Timer from A, and this causes C to open B for me.
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Dec 20, 2010
I have a datagrid that I use to display data from a SQL 2000 table. I am trying to write back any changes the user makes to the datagrid data back to the original table but don't know the proper method to do this.
[Code]...
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May 18, 2008
I have a storedProcedure that populates a dataset, this dataset is then used for a dataSource for a third party grid control. This all works fine, however I am having real trouble in updating the dataSet with the most recent data from my database.Below is the code that I am using to populate the dataSet:
[code]...
I am not sure how to update the dataSet with new data so that my grid control displays the most recent data. Could someone show me the code to do this?
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