.net - Convert An E.item.dataitem To Type (Of T)?
Jun 13, 2011
I'm trying to do this in an item_databound event of a datagrid in asp.net
Dim EntType As EmployeeEntity = DirectCast(e.Item.DataItem, EmployeeEntity )
but I encounter the error
Cannot convert to class EmployeeEntity
The EmployeeEntity class has the same members as the items in e.Item.DataItem's DataRowView items. so how else do i cast the contents, without having to actually set each property of EemployeeEnity individually, from the e.Item.DataItem ?
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Jul 7, 2010
With the ASP.NET Repeater control, I am used to being able to access my data item values in the ItemDataBound Event Handler by doing:e.item.dataitem("column_name")
However, it seems with the ListView control this is not possible. How can I access the data item values?
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Oct 22, 2009
I want to use explicit conversion (CType function in VB.NET) to convert the variable d from double type to integer type and store the result as 132.
Imports System.Console
Module Module1
Sub Main()
[CODE]...
This is my code. But Visual Basic tells me an error: Error1Type 'i' is not defined.C:\Users\mihaispr\Desktop\Conversie explicita\Conversie explicita\Module1.vb1922Conversie explicita
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Aug 30, 2010
I've pieced together some information from other posts but I'm stuck. The first part works fine. Basically I query the database using LINQ and then I loop through the results generating a report.
[Code]...
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Nov 19, 2010
i am getting all filenames from a directory.parsing out the directory names & the .vb extension then converting those filesnames to classes.Every file in the LPCriteria direcotry is its own class with a "Evaluate" function.[code]
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Aug 28, 2009
In a VS 2008 ASP.net 3.5 aspx.vb file, Response.Write(DDL.SelectedItem) worked very well.But "Dim filenameDDL As String = DDL.SelectedItem.Text" did not. Then I tried the following codes and found the problem -- Conversion from type 'ListItem' to type 'String' is not valid.
[Code]...
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Mar 5, 2011
I have a Repeater on one of my pages like so: [code] But, when I run it it errors out with the message:'btn<% Container.DataItem %>' is not a valid identifier.I want to append btn to the Container.DataItem value so that I have dynamically assigned control names that are associated with the underlying data item. Any ideas?
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May 24, 2009
This line of code((Matches)Container.DataItem).MatchIDworks in C# but in VB.NET, when used in a Repeater, I get the error
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Jun 8, 2012
Working in VB.NET, in a repeater. I only want to display part of the repeater if one the data item's fields is set to true.I am struggling to write a line that will accomplish this but am trying along the lines of this:
<% If '<%# Container.DataItem.IsLive%>' Then %>
<asp:PlaceHolder ...
<% End If%>
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Jul 29, 2010
I have a ListView in which i have a function that creates images for users.I pass userGender,userImage1name,userIsImage1Aprooved values to the function in which i generate image.ie. if user has approved image i return it back, otherwise i return default image based on gender.
My question is, is there any way to avoid passing 3 parameters to that function and to pass whole DataRow so i can get values of columns i need?In reality i pass about 12 parameters just made it easy for you.ie. i want to achieve something like that <%# GetImage(Container.Item) %> while in GetImage() i would be able to access Item("some_column_name") or C# version Item["some_column_name"].
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Oct 11, 2011
i m populating a datagridview with two columns i.e checkbox and papername.I m trying to show papercodes(not present in grid but in database ,in the same table where papernames are)in a single textbox with a comma seperator, when i checked papernames accordingly.
[Code]...
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Jun 12, 2010
. I get this error: "Cannot convert lambda expression to type 'string' because it is not a delegate type" - keyword select become underlined in blue
[Code]...
Above code should displays drop list of employees first name and last name in a combo box
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Dec 1, 2009
I want to evaluate the current DataItem being bound to a repeater and remove it from being added if my condition meets. I would have thought that setting e.Item.DataItem to Nothing would work, but it does not. Any ideas how to not add a DataItem to the repeater when a certain condition meets?
Protected Sub rpt_OnItemDataBound(ByVal sender As Object, ByVal e As RepeaterItemEventArgs)
If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
If true Then[code].....
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Nov 26, 2011
I have a User Control which is dynamically placed by CodeBehind as follows:
Dim myControl As Control = CType(Page.LoadControl("~/Controls/mainMenu.ascx"), Control)
If InStr(Request.ServerVariables("url"), "/Login.aspx") <= 0 Then
mainMenu.Controls.Add(myControl)
End If
As per an example from my previous question on here.
Within this Control is a repeater which calls a database to generate values.
My Repeater mark-up is as follows
<asp:Repeater runat="server" ID="locationRepeater" OnItemDataBound="getQuestionCount">
<ItemTemplate>
[Code]....
The example above works fine, but I want to be able to prepend text to <%# Container.DataItem %> in the title attribute of that <p> to print to the browser like this is some text DATA_ITEM_OUTPUT
When I try to do that though, it prints this is some text <%# Container.DataItem %> exactly like that, ie, turning <%# Container.DataItem %> into text, NOT the value from the repeater code.
It was working fine before I made it into a dynamically inserted control, so I am thinking I might have something being generated in the wrong order, but given that it works without any prepended text
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Oct 11, 2011
I'm currently doing some web applications and I wanted to know if I could add the text of every li to a new item in listbox1.
Here's the code on the website of which I have to work with[code]....
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Jun 29, 2012
How can I convert the item number in the combo box to be use able? I keep getting told to change RaceNum to a double but I need the RaceNum to stay as a int so it reads the files 1-15 but it starts at 0.
[Code]...
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May 25, 2012
Regarding my college project. i'm working on a sales system . i have a form which consist of all the following information( item code , item name , item price , quantity of item ) which is display using a data grid . data input by user using text box and all this information will be stored in a database(sales database) i'm using ms access 2007. the grand total will be displayed in a text box . and amount paid will be input in a text box too , my major problem now is how to i create a reciept that will have all this information of the purcase. i have a reciept button . what the next step ? i dont have any idea how to get the reciept done.
Imports System.Data.OleDb
Public Class Form5
Dim con As New OleDbConnection
[CODE].......................
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Jun 14, 2010
I would like to get the Type of item that a BindingSource is hooked up to or configured for. The BindingSource.DataSource property can be set to an object, list, or type. If it is a Type, it obviously does not have a bound item yet, but I would still like to get the Type. For a List, I need the item Type, not the list type.
I currently have a custom list type for business objects that implement an IListItemType interface, that I created to solve this problem a while back. I would now like to get this working in a more generic fashion so that it will work with any list.
I've looked through the API docs for for a good way to do this, but so far I have not had any luck. Am I missing something or is this just something I can not or should not be doing?
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Apr 11, 2012
I am defining an ArrayList type varaible. It can have of any type of items. I want to know the type of its item. Is there any way to know the type of items in the arraylist variable? I want to know the type of item in the for loop.
Dim ArrList As New ArrayList
Dim A As Integer
Dim s As String
[Code]....
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May 27, 2010
I am trying to write a function that has an object parameter. That object will always be an BindingList. That BindingList will be of some unknown (at design Time) class. I think I've figured out how to get the type of the collection object, but now here the tricky part. I'm trying to create a function that can handle any type of collection and be able to return an item from that collection. I need to create a new object of that type and return it from the function. [Code]
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Nov 10, 2011
I am using VB .NET 1.1 and wanted to make sure if inside a key value pair class "Dates" (collection type) a key by name "TerminationDate" exists.
If Not Dates.Item("TerminationDate") Is Nothing Then
'Do x y z'
End if
But this is throwing an exception: Argument Index is not a valid value.
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Jan 15, 2009
How can I use a string parameter for a method and convert this to a type.
I am using reflection to retrieve items within an enumeration:
CODE:
Currently I am creatnig a separate method for each enumeration in order to retrieve it's values.
What I would like to do is pass the name of the enumeration as a parameter to the method and cast this as a type.
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Mar 25, 2009
I have a piece of code that does an action to any collection that implements generic.IList<T>However to do this it needs to get the type <T> of the generic list.e.g. If I pass in a variable of type Generic.List(Form) then in my code I need to get the fact that the list is made of Forms. To add complexity the list may be empty (So you can't just look at Item(0).GetType)
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Dec 20, 2011
I am creating a simple console application in vb.net in order to convert a file from any type to utf8 but i can't figure out how this thing works with the encoding. I know that the source file is in Unicode, but when i convert it to a new format i get junk. Any suggestions? i am not sure if my code is correct
this is my code.
[Code]...
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May 31, 2012
I am converting an application originally written in vb6 to vb.net. One of the things this application does is that it sends a object to a dll. I tried converting the type to a structure and p/invoking the dll but it does not seem to work
'Define WICS Communications Control Block (CCB).
Type WicsCCBType ' Create user-defined type.
CCBNum As String * 1
[code].....
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Dec 27, 2010
I ve the following stream but I don't know its encoding type because the stream reader detects encoding from byte order marks
Dim reader As StreamReader = New StreamReader(respStream, True)
so how can I detect the encoding type AND convert it to another type? (for ex. from ASCII to UTF8)
PS: What is the difference with the following line?
Dim reader As StreamReader = New StreamReader(respStream,
Encoding.ASCII, True)
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May 22, 2012
i am getting id from the url and pass it to sqldatasource - selectcommand i get thefollowing error : Conversion failed when converting the varchar value '<%=MyIdVal%> to data type int.
code behind :
Public Partial Class Edit
Inherits System.Web.UI.Page
[code].....
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Apr 26, 2010
I'm using vb.net 2008 edition and i was wondering if there a way to convert an array type to another array type. For instance say i dim an array as string and then want to convert the array to the integer data type for sorting, how would i go about this?
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Jan 13, 2011
In VB.NET 2010, how to return a boolean value as generic type without compile warning?
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Dec 21, 2009
convert binary image to jpg or png one.i've saved some types of images in my database but now i want to display them but i can't do it
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