Child List For Field GridView1 Cannot Be Created
Oct 29, 2009I have an error in my application, "Child list for field GridView1 cannot be created."[code]./..
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Child List For Field Cannot Be Created Error Message
Jun 15, 2011im getting error after I run an UPDATE sql query and the datagridview needs to update....not sure what the problem is. heres my code, first block is what the program does on load, the second block is where im getting the problem.
Code:
Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
Module1.Main()
[Code].....
Getting Error Message Child List For Field VwMedicalRecords Cannot Be Created
May 28, 2010I'm using a stored procedure to fill my dataset. The stored procedure retrieves the data from a view named "vwMedicalRecords". When I bind the result to a windows DataGridView control for the first time the binding work fine but the second time it fails with the above error message.
I placed a refresh button on the form which I use to rebind the datagridview (reloading data).So the first time as I mention its working fine the second time fails third time work fine fourth time fails and so on.
[Code]...
Create List Of Child Objects From List Of Parent Object?
Jun 2, 2011I would like to create list of child objects from list of parent object. Like If i have list of bookingroom which has one member room then i would like to create list of room from it.
eg. code:
Dim BookingRoomList As List(Of BookingRoom) = New List(Of BookingRoom)
Dim RoomList As List(Of Room) = New List(Of Room)
BookingRoomList = BookingRooms.FillGrid()
[Code]....
Is there any short cut method instead of iterating over for earch?
VS 2005 Sort List Of Objects By Child List Order?
Jul 20, 2011I'm having a bit of a 'brain doner' moment here
I have a list of Objects. Each of these Objects contains a list of other Objects (pseudo code) :-
Private Structure Object1
dim Name as string
dim ListOfObject2 as List(Of Object2)
[Code]....
I need to sort the list of Object1 by the Value in Object2. I have a comparison class which sorts Object2 by its Value nicely.
Wpf - Hide Dynamically Created Child Elements Of A Grid?
Aug 30, 2011I have a grid in which I have created and added elements from the code behind.
Dim staffImgLeft As New Controls.Image()
staffImgLeft.Name = "StaffImgLeft"
mainGrid.Children.Add(staffImgLeft)
When I am attempt to remove the child elements from the grid they are not being removed.
mainGrid.Children.Remove(mainGrid.FindName("StaffImgLeft"))
There are no errors when the code runs. Can anyone advise why my code isnt working?
.net - Use LINQ To Find MAX Or MIN Of A Field From All Child Records
Apr 20, 2011way to write the LINQ query. The parent class is simply a student's name and a list of test score data. The child class is a single test score datum. I want to find the worst (or best) score out of all of the TestScore values and then identify the student who had the best score.
Dim query = From s In studentList _
Where s.ScoreList.Select(Function(d) d.TestScore).Min _
= studentList.SelectMany(Function(g) g.ScoreList).Select(Function(h)
[Code].....
Child Tries To Delete A Character From A Previous Field?
May 3, 2010I am making a small and very simple game that is ment to help children learn to recognise letters. I have come to a stop as I have 3 text fields. When something is entered into the first field, the program will set focus to the next text field. The problem is when the child tries to delete a character from a previous field as the focus is already set to the next text field. I want it to delete the character from the previous field when the backspace bar is hit. Any suggestion how this might be done?
View 5 RepliesGet Active Child Input Field On Window?
Aug 29, 2010I am having trouble catching getting the currently active text input on a 3rd party window.
If I use GetForegroundWindow it returns the handle of the main process of that window.
.net - Add Click Event On Dynamically Created Child Menu Items?
Jun 9, 2012How can you add a click event to dynamically created menu item?I thought I could do something like
Loop through all the items in the Menu1.DropDownItems then create a mousedown even on the item and execute an action based off that.I'm new to VB and was wondering what logic to use. Will that even work? How will the events be saved through the life of the application?
Loop Through Child - Bind Textbox To Field Of Parent Table
Mar 22, 2010First 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.
GridView1 First Row Always Selected?
Sep 2, 2009I have 2 GridViews in my page, GridView1 Display countries and GridView2 Display Cities from selected country. It works perfect but I need to have GridView1 first row always selected just like DropDownList where you Enable AutoPostback
View 1 RepliesGridView1.SelectedRow Returning Nothing
Sep 13, 2010My problem is that in the below code, the SelectedRow property returns nothing. I manually bind items to GridView at runtime and autogeneratecolumns and autogenerateselectbutton properties are true.
I think the problem is about having a PostBack when the Select command is clicked.
Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
Session("ContactID") = GridView1.SelectedRow.Cells(0).Text()
Response.Redirect("~/ContactAddress.aspx")
End Sub
Display A List (Of Object) Which Has Single Objects And Child List (Of Object)?
Sep 6, 2011Limited to using v2.0 of .Net framework (we use VB.net) due to environmental constraints on our servers.I've got an ASP.net webpage which pulls data from a webservice that performs checks on user accounts in active directory. Operators can check multiple accounts at one time using the web interface. The webservice returns a list(of AccountCheck) objects which themselves contain single properties like username, email address, and List(of AccountError) objects which contain multiple properties.[code]What I want to do is using some kind of repeater, create multiple panels or divs which contain labels showing the username, email etc, and a gridview which has the accounterror list bound to it to show all the errors. The users could be checking 2, 5, 7 accounts at once, and is dynamic.
View 2 RepliesHow To Redirect To Different Pages - Use Two Imagebuttons In Gridview1 In Asp.net (VB)
Jan 2, 2011I have a asp.net webform i m working in VB I have a gridview with template field status ..i have taken two image button in same template field in Item Templates i want when i click on image button1 i redirect to default.aspx ?
and if i click on Imagebutton2 i redirect to default2.aspx ?I have did this
Me.Response.Redirect("Select_seats.aspx?" & "s_no=" & GridView1.SelectedRow.Cells(9).Text.ToString & "&" & "journey=" & Label6.Text & "&" & "seater=" & label4.Text & "&" & "sleeper=" & label2.Text & "&" & "service=" & lab5.Text.ToString)
The problem with this is that the both image button would be redirect to same page .... if i taken this query in gridview select index changed ?
Transfer Label5 Value According To Row Selected In Gridview1
Jan 15, 2011[code] ITS ONLY RETIEVE THE FIRST ROW LABEL5 TEXT TO view_feedback.aspx, even if i select the first row of gridview or i selct last row of gridview Can anybody modify this code so that ..it will transfer the label5 value according to the row selected in gridview1
View 2 RepliesForeign Key Constraint Error / Parent Record Does Exist But Won't Let Child Record Be Created
Feb 21, 2010While 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.
MDI Child Not Showing In List?
Oct 25, 2010I currently changing an in-house Access Database to Visual Basic 2010. Since they are used to tabs in Access, I decided to use MDI Parent and MDI Child. What I dont allow is for the user to change the size of the Child. With that, I used a menu strip making one of the items [Open Windows] the MdiWindowListItem which worked great for awhile. Now I can not get any list to show no matter how many windows are opened. About the only thing I can think of that may or may not be the issue is I allow another MDI Child attached to the Parent from the MDI Child. Like below:
With newForm
.Text = formTitle
.MdiParent = Management
[Code]....
Even with removing this code to test it this caused it still had the same issue. I even went as far as adding a new menu and attaching it to the MdiWindowListItem with the same results.
Interface And Graphics :: MDI Parent / Child - Child To Check To See If It Is The Last Child Object Before Closing
Feb 18, 2011Im 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.
View 2 RepliesAsp.net - How To Sum A Field In A List(Of Xx)
Mar 14, 2012I have:
Dim aList As List(Of myObj.Answers) = myObj.GetResults(someID)
This returns:
aList.AnswerID | aList.AnswerCount
1 3
2 5
3 9
How can I get the sum of aList.AnswerCount field in my List(Of myObj) ?
VS 2010 Created New Class And Require Text-box Field Within A Sub In New Class
May 9, 2012can someone please help me with a textbox? I have created a new class and require this textbox field within a sub in the new class but i get Error1 'TextBox1' is not declared. It may be inaccessible due to its protection level.I have tried MyClass.TextBox1 = Form1.TextBox1 but I get declaration expected.
View 23 Replies'Gridview1' Fired Event Sorting Which Wasn't Handled
Jun 21, 2010I am back with a problem again I have a grid and I am trying to implement sort for it.Basically I have binded the data manually to the grid now my problem is I do not know the code to be written for the sorting event:( some how managed to get the code for the page indexing :-/,...doesnot have much idea!! could you !!"experts" help me out by giving me some hint or sample code in VB.Net:icon_exclaim: unable go ahead further:
View 1 RepliesCould Not Find Control 'GridView1' In ControlParameter 'productid' Error
Apr 7, 2010im tryin to link the 2 pages to each another, 1st, when i click on the View hyperlink in the product page, its supposed to lead me to the product view page, with the product chosen being displayed. Ive searched the net, and well, ive found some solution on this, but most of them were to update the statements, for my case it would be just to lead from the product page to the product view page. But everytime i press the view link, it leads to an error.
The source code is as below
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="productid"
DataSourceID="SqlDataSource1">
[Code].....
Created A List Box And A Combo Box With A Number Of Different Currencies?
Apr 19, 2009I'm very new to programming with Visual Studio(just a few weeks). I've read through a beginner's book and I've started to write my first little programs to get used to coding and to improve my skills. One of the first programs I had created was a simple currency converter. I've created a list box and a combo box with a number of different currencies in them and I want to know if there is an easy way to attach a value to each of these selections. For example, if someone selects British Pound in the list box and Indian Rupee in the combo box, I want to be able to have the British Pound be worth 1.67(versus the dollar) and the Rupee to be 25.00(versus the dollar) for example so that I can create a simple function that will change pounds to dollars and then to Rupees so that I can do this calculation with a multitude of currencies. If you have some idea of how I can attack this problem,
View 2 RepliesMDI Child Form List / Sub-Menu Options
Jan 19, 2012As you can see from the screen shot I have managed to get MDI Parents / Child forms working, and managed there to be a menu option on the Parent form that displays all the Child forms opened at the time. What I was wondering, and as of yet through research haven't discovered, is there a way when the list of windows is created, if a user highlights any child in the list it opens a sub-menu from its name (eg. Rename Window, Center Window, etc).
View 4 RepliesMDI Child Form List / Sub-Menu Options?
Jun 23, 2012MDI Child Form List / Sub-Menu Options
View 12 RepliesChangevlabel1 Text To Block N Unblock If Checkbox In Gridview1 Is Checked?
Jan 25, 2011I want if checkbox1 in gridview is checked then the label1 text in gridview is Block if checkbox1 in gridview is unchecked then label1 text n gridview is unblock .[code]...
View 1 RepliesEvaluate All Occurrences Of A Field Within A List In .NET?
Apr 6, 2011I am new to VB.NET and I keep telling myself there must be a better way to do what I need to do several times a day which is look into a list and see if that one field is set to true anywhere in that list.
So far, I've been using the For Each statement:
[Code]...
But I know some of the other languages can do something like: if ListOfPlayers(*).isActive == true
which just seems more concise and to the point.
Determining List Index Of Child Event Sender?
Feb 23, 2009I have a list of objects, each with several events. I can add an eventhandler to each object, so I can catch each item's events. But I would also like to know the sender's index in the list (ie, was this object the 3rd, 5th, etc, item in the list?) I'm guessing the object doesn't "know" its position.I could give each object an index number property when it is created and added to the list, so that information could be passed. However, I would have to reindex every item everytime I use remove, insert, etc, methods.
View 4 RepliesLinq To Xml Query Returning A List Of All Child Elements?
Mar 8, 2010I have got an xml document which looks something like this.
<Root>
<Info>
</Info>
<Info>
[Code]...
How can i write a linqToXML query so that it returns me an IEnumerable containing each child element, in this case all five child elements of , so that i could iterate over them. The order of child elements is not definite, neither is number of times the may appear.