Access Method Of ServiceHost Type?
Dec 2, 2009So I have a WCF Service that has service methods. One of the methods needs to be called from the application that is hosting the service. I am using a ServiceHost to host it. [code]...
View 1 Replies
ADVERTISEMENT
.net - Get A Base Class Method Return Type To Be The Subclass Type?
Nov 23, 2009I have a copy function that I'd like to override in subclasses to return the type of the subclass. Here are my interfaces:
Public Interface IBase(Of T)
Function Copy() As T
End Interface
[Code]....
LINQ To Entities Does Not Recognize The Method [Type] GetValue[Type]?
Mar 14, 2012I've a simple class like this:
Public Class CalculationParameter{
public Long TariffId{get;set;}
}
In a workflow activity, I've an Assign like this:
(From tariffDetail In db.Context.TariffDetails
Where tariffDetial.TariffId = calculationParameter.TariffId).FirstOrDefault()
Dto is passed to Activity as an Input Argument.It raise following error and I'm wondering how to assign Id.LINQ to Entities does not recognize the method 'Int64
GetValue[Int64](System.Activities.LocationReference)' method, and this method cannot be translated into a store expression.
How can I assign the calculationParameter.TariffId to tariffDetial.TariffId?!
UPDATE:Screen shot attached shows that how I'm trying to assign calculationParameter.TariffId to tariffDetail.TariffId (car.Id = Dto.Id) and the query result should assign to CurrentTrafficDetail object.
Get The Number Type Data As A Number Type Using The Dataset Readxml Method?
Feb 17, 2010i am getting the xml using readxml method. And then display the data in datagrid. But number type columns comes as string type in the dataset. So when datagrid displays , sortingdatagrid columns is not correct. For example it sorts like this:
Salary
1180
12133
[code]......
.net - Extension Method And Type Constraints?
Sep 13, 2010I am starting to play with extension methods and i came across with this problem:In the next scenario i get a: "extension method has a type constraint that can never be satisfied"
Public Interface IKeyedObject(Of TKey As IEquatable(Of TKey))
ReadOnly Property InstanceKey() As TKey
End Interface
[Code]...
C#: Why Does The String Type Have A .ToString() Method
Apr 25, 2012Possible Duplicate: C#: why does the string type have a .ToString() method?Why is there a ToString method exist in String class (VB.NET)?
String.ToString()
Will it be a overhead if it is used like
TextBox.Text.ToString()
Calling A Method Over Variable Of Type Object In Vb And C#
Jul 5, 2009in vb I can do that
sub SetFocusControl(byref ctl as object)
ctl.Focus
end sub
in c# the compiler complaint that object doesn't have a Focus method
void SetFocusControl(ref object ctl)
{
ctl.Focus();
}
how can I do the same in c#?
Failure To Infer Type From Anonymous Method?
Jan 24, 2011(using VB 08!) In order to avoid "magic strings", I have used this handy method (not my own!) many times to get a property's name as a string:
Function GetPropertyName(Of T, R)(ByVal expression As
Linq.Expressions.Expression(Of Func(Of T, R))) As
String
[Code].....
Pass The Type(t) When Call ToGenericType Method
May 27, 2010I have the following generic method : Namespace Helpers
[Code]...
I would like to use type interference so that when i call ToGenericType method, I would not need to pass the type(t) This is how i call ToGenericType now.......
[Code]...
Passing Parameter (Value Or Referenced Type) Into Method?
Nov 11, 2009What happened when parameter passing. Here is a test project I write.
Public Class Form1
'1.test string
Private Sub btnString_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnString.Click
Dim str1 As String = "x"
[Code] .....
From the project you can see, when pass integer type parameter (value type) into a method , if use ByVal keyword, the value won't change. If use ByRef keyword, the value will change (I can understand it, to my understanding, when using ByVal, It pass the value of the argument to the method; when using BvRef, it pass the address of the argument to the method, so the value can be rewrite)
Well, for the following two scenarios , I can't understand why.
String type is reference type, but it acts like integer type.
Val type is also reference type, but no matter what you use(ByVal or ByRef), the result will be the same.
So my question is what actually passed into method? What's the underlying mechanism about pass parameter? What's the effect of ByRef and ByVal to value type and reference type?
Invoke A Method Of An Interface Of Which The Return Type Is _variant_t?
Mar 3, 2009Attempting to invoke a method of an interface, of which the return type is _variant_t
Code:
_variant_t resultsDataString;
_bstr_t simObjectNames;
simObjectNames = SysAllocString (L"TEST example 3");
resultsDataString = pis8->GetSimObject (simObjectNames);
[code].....
VS 2010 : Alternative Method For Getting File Type Description?
Nov 15, 2009I am currently using the registry to get file descriptions for files. As an example, so that a DOCX file will return the description "Microsoft Word". I am doing this from the HKEY_CLASSES_ROOT registry key.However, registry access is extremely slow, and I need to do several thousands of these. Is there an alternative way to do this?
View 6 Replies.net - Invoking Interface Method Using System.Object Type Variable
Jan 6, 2011I have an interface ITest with a method GetResult(). I have a class Test which implements ITest and thereby defines private method GetResult().
Next I create an instance of Test in a different class. The code is as below:
Module NewClass
Public Sub New()
Dim i As ITest = New Test()
[Code]....
I am migrating existing code from VB 6 to VB.NET and hence I'm not supposed to change the access modifier of GetResult. Leaving it Private will throw InvalidCastException Unable to cast object of type 'System.Object' to type 'ITest'
Object type variable o is used in many places and hence I don't want to change that. And yes, Test implements ITest.GetMember with a different name.
VS 2005 : Error : The ReadElementContentAsString Method Is Not Supported On Node Type None
Mar 29, 2011I get an error : The ReadElementContentAsString method is not supported on node type None.trying to parse an xml string from the server, this is my code
Dim reader As XmlReader = XmlReader.Create(New StringReader(sTempUrl))
reader.ReadToFollowing("result")
Dim strResult As String = reader.ReadElementContentAsString()
[code]....
Data Type Mismatch Between Vb Date Datatype And Ms Access Datetime Data Type?
Dec 27, 2010I'v designed a ms access database table with one field having Datetime datatype. I can Insert data into it from vb.net front end by trns_dt DateTime.Now.DateBut when I fetch records from the tableand assign the dataset datasource as da, it shows datatype mismatch error.
daleDbDataAdapter("SelectDaily_Transactiondtp_from_dt.value dtp_To.value con)
dsDataSet
[code].....
Write An Url Sniffer Type Application Like Firebug - Obtain The Headers Using The Method?
Dec 14, 2009I'm going to write a url sniffer type application like firebug, just for the exercise.I have used httpRequest/response in the past and wonder how i could obtain the headers using this method? or perhaps i need to be going down the root of sockets which i know nothing of value about? perhaps it can be done using webbrowser too.
View 1 RepliesStrongly-typed Generic Method Invokes Its Argument's Base Class Method Instead Of A Shadowed Method In T?
Oct 19, 2010Consider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:
[Code]....
Access A Webservice Method From VB?
Jun 23, 2010i am trying to access a webservice method from vb .net
dim xml as string
long id = 123
string[] accountList = new string[]{"1234"};
xml = ws.test(ID,accountList);
i am not getting my result in xml string.
Best Method For MS-SQL Database Access?
Sep 1, 2011I'm using VB.net Express with SQLExpress. I've got the reader working in my program, but I'm trying to find the best way to go with SQL access in my VB program. I need to be able to write fairly sophisticated SQL queries from many different tables and then either load the data into VB arrays or? in order to do some calculations and field selection. I'm not displaying any data on the screen, like so many examples out there seem to illustrate.
View 6 RepliesAccess A Method's Parameter From An Associated Attribute?
Mar 19, 2009Given the following classes, how can i intercept Class1.SampleMethod's Value from SampleAttribute?[code]...
View 2 RepliesAccess MyBase From An Extension Method?
Jan 1, 2010how do we access MyBase from an extension method?
i'm trying to extend a Sub called PassDown that would call the form's Base's OnPaint method
<Runtime.CompilerServices.Extension()> Public Sub PassDown(ByVal form_instance As Windows.Forms.Form, ByVal e As EventArgs)
MyBase.OnPaint(e)
but of course, mybase couldn't be accessed this way so is there an alternative?
Asp.net - Access Web.config In Extension Method?
May 31, 2012Can I access values in application settings of web.config in extension method?I have the below code but it is not working:
<Extension()> _
Public Function DocCountExt(ByVal value As Collection) As Integer
Dim maxOffSet As Integer = Integer.Parse(ConfigurationManager.AppSettings(APP_SETTINGS_OFFSET))
return maxOffSet
End Function
The above code does not work.
Cross-Thread Method Access?
Jan 29, 2009I've got a problem. I'm running a different thread. The thread's sub is looping, doing various things during the program, and eventually tries to close the form. I get an error, because the other thread can't access the "Me" object, I guess. It won't close the form. I don't want to use Application.Exit. Is there another way?
View 3 RepliesHow To Access Variables From URLs That Come From Get Method
Mar 14, 2009Asp.net has turned out to be alot easier to use than PHP (so far). However, I have been searching for a while and simply cannot figure this out. How do I get the variables that are contained in the url of my page (that originate from a form that had the method "GET") and utilize them? For example, my page would be [URL]. How would I get the value of some variable?
View 5 RepliesAsp.net - Access Method In Aspx Page From The Usercontrol?
Sep 18, 2009I have a button in my usercontrol. When that button is clicked I need to call a method thta is in aspx page.
View 2 RepliesVS 2008 Shared Data Access Method?
Jul 31, 2010use of the shared function, which returns a reference to a datatable to the calling code. While there a probably many debates as to the preferred use of ADO.NET objects, my question is about the Shared Method aspect. Note that the dataTable is declared within the Shared Function, so it seems to me you get a new one every time, yes?
Public Shared Function MyData() As DataTable
Dim ReturnData As New DataTable
'A silly example of retreiving some data into a datatable:
Using cn As New SqlClient.SqlConnection("SomeCOnnectionString")
[code]....
Access A 3rd Party Application In The Background With The SendMessage Method?
Jul 27, 2009I want to access a 3rd Party application in the background with the SendMessage method. It just needs to send a "space" to the software to trigger an action. It is important that this is done in the background because its a periodic event (ca. every 10 seconds), and it should be possible to simultaneously work on the same machine.
I tried to use the same approach which is shown in [URL]
The code I used is as follows:
Const WM_CHAR = &H102
Const BM_CLICK As Long = &HF5&
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd
[Code].....
Forms :: Form Object Access From Class Method
Oct 22, 2009I want a string and a listbox, both which are in a form to be modified by an instance of a class method. Should (could I):
1. Pass the entire form to the class method as parameter.
2. Pass the listbox and the string to the method as parameters.
What's the best approach to get access and modify this string and listbox on the form.
VB 2010 Express ExecuteScalar Method OleDb (MS Access)?
Sep 19, 2011How do I implement the ExecuteScalar method to return the first element in a sorted dataset?
Here is my code:Imports System.Data.OleDb
Sub Dim oCmd As OleDbCommand
Dim strConn As String
Dim strQuery As String
strConn &= "Provider=Microsoft.Jet.OleDb.4.0;"
[Code]...
VS 2010 Free Method To Access Installation Directory
Jan 20, 2011My app has a folder that has some xml documents which is or should be created within the installation Directory. What is the best / most problem free method to access the installation directory: [code]
View 6 Replies