Automatically Insert Dataset Result To Generic List?
Apr 3, 2009Lets say i have a class Employee which cotains two propeties (Name, Year) I have another which basically contains list of Employee object i.e EmployeeList.[code]...
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.net - Converting Linq To XML Result To Generic List?
Nov 22, 2009I have a function that works great in C# that I'm converting to VB.Net. I'm having an issue converting the result set to a generic list in VB.net.
The code:
Public Function GetCategories() As List(Of Category)
Dim xmlDoc As XDocument = XDocument.Load("http://my_xml_api_url.com")
Dim categories = (From category In xmlDoc.Descendants("Table") _
Select New Category()).ToList(Of Category)()
Return categories
End Function
The error occurs when convertng the result via .ToList(Of Category)() The error:
Public Function ToList() As System.Collections.Generic.List(Of TSource)' defined in 'System.Linq.Enumerable' is not generic (or has no free type parameters) and so cannot have type arguments.
Category is a simple object I've created, stored in the App_Code directory.
I have the necessary "Imports System.Collections.Generic" reference in the file so I don't see why I can't convert the result set to a generic list.
Convert DataSet To Generic List?
Mar 11, 2012How do you convert a DataSet to generic list.I see that in C# you can use .toList(). I'm using .net3.5 vs2008 vb?
View 5 RepliesLimit Result Being Put Into DataSet And Get Next Result From Database
Apr 16, 2010I just read about DataSet in VB.NET, it uses disconnected concept. My question is: if my apps has "List All" button that query data from 1 table in the database, and that table has "very very very" many rows, so my DataSet will be filled with those data and eat up memory. Can I limit the data that being put to the DataSet from that query? But I want to be able to retrieve the next data from the same query if the user want to see it?
For example:
I have 1000 rows in my database, and i query all of them. But I just want 200 rows being inserted to my DataSet, but if the user want to see rows number 201 and so on, I want to be able to retrieve the next 200 rows, and so on. So it just like cutting those data into a group of 200 rows. Can I do this with the concept of "disconnected" of the DataSet?
.net - Creating A Generic List Of A Generic Type
Jun 30, 2011I am trying to create a list of a generic type in vb.net 2.0 framework.
This is the generic type definition:
Public Class GenericParamMap(Of T)
Public Sub New(ByVal pParamName As String, ByVal pPropValue As T)
mParamName = pParamName
[Code]....
The compiler does not allow a "T" in the method's parameter because it's not defined, but I'm not sure how or where to define it. I thought it was okay to have a generic method definition.
DateDiff Result Is Automatically Rounded Off?
Jun 21, 2010i have a problem on my DateDiff result. For example the result is 3.5, it will only show 3. How can i control that?
View 1 RepliesAutomatically Add The Result To A Textbox, Without Pressing A Button?
Jun 3, 2011I have three textboxes on a form.The first two are for entering numbers for addition.And the third is for displaying the result of addition.I want the result of addition to appear in the third textbox as soon as I enterthe numbers in the first two textboxes, without pressing any buttons.
View 4 RepliesDetermine If Property Is Generic List<of T> Via Reflection And Loop List Items
Oct 1, 2009I'm looping all the properties in an object via reflection:
For Each p As PropertyInfo In values.[GetType]().GetProperties()
If p.CanRead Then
'Do stuff
End If
Next
how to determine whether the property in question is a generic List(Of T)? If it is I need to loop the list itself.
I've experimented with GetType and TypeOf but have not managed to get anything working.
To clarify, I want to keep this generic. I do not want to specify the type of T, I need to loop the list items and call the ToString method on each item. T could be one of a number of different types (application specific reference types). Is it possible to do this without specifying types?
(VB.NET 2005 with .Net 2.0)
Get Type Of Derived Generic List Class From List Item Method?
Mar 23, 2011Public Class notifierMain
Public Class Contacts
Inherits List(Of row)
Public Sub New()
[code]....
When I debug this winforms application I get curType = "notifier.notifierMain+Contacts+row" I want to the Validate function to know it is in MyContacts. How do I do this?
.net - Returning A List Using Entity Framework, 'System.Collections.Generic.List Cannot Be Converted To '1-dimensional Array
May 3, 2012i have issue returning a list in a web method. here is the code
<WebMethod()> _
Public Function getTags(para_parents As String) As List(Of getTypeDetailsByParentName_Result)()
Dim context As New PPEntities
[code]....
the error is
Value of type 'System.Collections.Generic.List(Of SaftyonRoad.getTypeDetailsByParentName_Result)' cannot be converted to '1-dimensional array of System.Collections.Generic.List(Of SaftyonRoad.getTypeDetailsByParentName_Result)'
Pass Generic List To A Function That Has A Custom Defined List
Apr 7, 2011it seems always at this time I cant figure out how to do something maybe it has something to do with lunchtime.
Im having trouble using a method that is defined by an outside company
This is a link to their integration guide:
[URL]
This is their documentation for the class Im trying to use
OrderQueryWebService Class
This class is for SID in particular and is made for use with the notification methods. This is for the Order Query Web Service specifically, allowing clients to return the status of transactions for their merchant, whenever they want to.
Methods
/ <summary>
/ Pass through the variables required and receive a list of Transaction
objects showing transaction status
[Code].....
The MerchantCode, the MerchantUsername, the MerchantPassword are all good the List is a custom type called SetComHash.Transaction
Everytime I try adding a string to the list such as the transactionNumber and some other values it gives me a type error:
"Value of type string cannot be converted to 'SetcomHash.Transaction'
.net - Sort Generic List Based Upon A Different List?
Oct 29, 2010What would be the fastest way to sort a list that contains a list of objects, based upon another list? An example follows:Say I have multiple lists of employees. Each individual list has a common property value, say "Department". So I have a list of employees, in one list they all have the department string value of "Sales". In another list all the objects have a department value of "Finance". These lists of employees are then contained in a list which holds them all.
I have a second list, which should drives the sort order of the employee lists. The second list simply contains a list of strings like, "Finance", "Sales", "IT" and so on. I'd like my lists of customers to be sorted in the order of "Finance", "Sales", etc.I'm using VB.NET in .NET 2.0
Validating Datagrid Value Against Dataset Result?
Dec 20, 2011I'm trying to validate the contents of a datagrid cell against the values in a Dataset:
VB
Private Sub dgOperator_CellValidating(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles dgOperator.CellValidating
[Code]....
Compare The Contents Of The Textbox With Result Of The Dataset?
Sep 14, 2009How do you compare the contents of the textbox with result of the dataset?
View 4 RepliesSet A Default Value In A Combobox Depending On Result From A Dataset?
Jun 6, 2012I have a small section of a windows form that allows users to select when a customer should be called (i.e. day of the week, time and inbound or outbound)When the form is loaded I will extract the information using a dataset and bind to form controls. I want to use a combo box for call stautus - inbound or outbound - however wish to give the user the choice at runtime.My thoughts are I would need to set a static list (so the user could choose) and set the default or displayed value to the info the dataset has extracted.This code to select the index doesnt work when I am comparing the dataset result to the "Outbound" string even though I am using the ToString method.
Private Sub TestTelesalesForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Me.Telesales_DEV004016TableAdapter1.Fill(TelesalesDataset1.Telesales_DEV004016)
Me.comboCallStatus.Items.Add("Outbound")
[code]....
Insert Into A Generic Dictionary With Possibility Of Duplicate Keys?
Apr 2, 2010Is there any reason to favor one of these approaches over the other when inserting into a generic dictionary with the possibility of a key conflict? I'm building an in-memory version of a static collection so in the case of a conflict it doesn't matter whether the old or new value is used.
If Not mySettings.ContainsKey(key) Then
mySettings.Add(key, Value)
End If
[code].....
LINQ To SQL Generic Class For Insert And Delete Operation?
Nov 27, 2009I have been writing same code for insert, update, delete with LINQ over and over again. I want to have some sort of generic function for Insert, Update, Delete operation. I read a post here like the following :
public static void Insert<T>(T entity) where T : class
{
using (OrcasDB database = new OrcasDB())
[code].....
Generic TypeOf Operator - See If List Is A List(Of T) Variable - Error: "Type Expected"?
Jan 5, 2011Dim x = GetType(List(Of )) 'valid statement
Dim list As New List(Of String)
Now I want to see if list is a List(Of T) variable: Dim isList = TypeOf list Is List(Of ) On the last line I get a compile error: "Type Expected". Is there any cheap-performance TypeOf operator alternative for generics?
Error - Red "List" Says Too Few Type Arguments To System.Collections.Generic.List(Of T)'
Mar 12, 2009I have converted c# .cs to vb:= I have 6 errors on:
Red "List" says Too few type arguments to system.Collections.Generic.List(Of T)'
Orange "Calendar" says Value of type 'System.Windows.Forms.Control.ControlCollection' cannot be converted to 'Form1.Kobush.Windows.Forms.Appointment'.
[code]....
Asp.net - SQL: Insert Date Automatically?
Apr 28, 2011I was wondering how can I fill a column automatically in the database with the GETDATE() ?
Like when I open the database the date of that column should be GETDATE() automatically
Automatically Insert 'http://' Before Url In Textbox?
Apr 6, 2010How can I get my textbox to automatically insert 'http://' before the url? It is an address bar in my web browser.
It needs to check if http:// is already there, and if it isn't, add it before the url.
How To Automatically Insert Data To Another Textbox
Oct 15, 2011when i input data to a textbox1 and then i press enter using keyboard, then another description will appear in textbox2. For example, i have to key in a company's code: A001 into textbox1, after i press Enter using keyboard, the company's full name will appear in textbox2.
View 4 RepliesInsert Serial Keys Automatically?
Nov 6, 2009I need to automate the installation of some Antivirus applications. I can easily do it by utilizing the Process Class, but I also needed to know if there was a way to automatically input the serial key.
I thought I remember someone mentioning a property or something that could be used for that, but I can't remember what it was or who said it.
Check Result Of Insert Command To Access Database?
Apr 6, 2011How do i check if the command insert new data in my ms access database this is my code so far.[code]...
View 12 RepliesComoboBox Insert New Item To Database Automatically?
Apr 10, 2012I am using a combobox in VB .net to show customer's name. They also can type new names if they wish. Can I somehow save these new names in my sql database dynamically?
What I mean is if the name is new and does not exist in my database, can it be automatically saved to the database?
My combobox is bound to my name table.
Fill TextBox Automatically, Then Store To DB On 'insert'
Jun 6, 2011I have a textbox that represents a primary key in my database. Because the values are nvarchars I can't automatically increment for a new insert. Instead I have to read a value from a drop-down, perform some magic, and create a new incremented value for the new insert.
I've written codebehind that does all this when the drop-down is selected. It works, in that it puts correct values into the textbox. However when I try to insert, I get an error that that field cannot be null.
I'm pretty sure it's because I'm doing this in the codebehind : myTextBox.text = newValue
which wipes out the binding the textbox should have : Text='<%# Bind("UniqueName")
How can I calculate the needed value for this field programmatically and set it back to the screen so the user can see it (and possibly override it) and still keep the databinding intact so I can create the new record?
How To Automatically Insert Commas After Every Word In Textbox
Sep 12, 2009I'm trying to automatically insert commas after ever email in textbox1.text after the user imports a list of emails.Something like ..I want this to automatically occur after the user either drags n drops the emails into the textbox or copy n paste the emails into the textbox so that the user doesn't have to manually insert commas.
View 4 RepliesInsert Into Database Automatically Creating A Folder
Nov 11, 2011I was just wondering if this is possible. I have a site that admins use to add products to our database. The database is in SQL Server 2008 and I use Visual Studio 2010 using VB.net and was hoping that upon addition of a new product, it would automatically generate a folder assigned to that product's ID.I haven't found anything online that would suggest that this is a possibility, but it would make it a lot easier for me. As of right now, I have to remember to create a folder in the X: drive for each product that has been added. We are up to 645 products now,
View 2 RepliesInsert Into Database Dates And Codes Automatically - Insert Into Database Dates And Codes Automatically
May 13, 2009I'm working with time and attendance application and i need to do something will help the data entry that will use my application so i want to create form to insert enter/leave time and date for all employees
[Code]...
Insert Into Database Dates And Codes Automatically?
May 13, 2009I'm working with time and attendance application and i need to do some thing will help the data entry that will use my application so i want to create form to insert enter/leave time and date for all employees
textbox1 for inserting start of employee code
textbox2 for inserting end of employee code
textbox3 for inserting the date and time for enter
textbox4 for inserting the date and time for leave