.net - Interop Cannot Call Get_Range, And Cannot Use Two-dimensional Object Array Returned By Range().Value2?
Jun 1, 2011
Trying to replace Cells(RowIndex,ColumnIndex).Value() calls by row-wise references for performance, I permanently fail at referencing the result. Starting with Excel Interop - Efficiency and performance, which contains the tip to use get_range, i.e.
However, referencing Values with two dimension indices always returns an "index was outside the bounds of the array" exception. Inspecting the array with the debugger shows a nice 2-dimensional array which should has 17 elements on the second dimension, so Value (0,0) should indeed be a valid reference -- but it isn't:
The debugger lets me inspect Value, I can also drill down to Value(0,0) and see the correct value, but re-evaluating just that element, i.e. inspecting "Value (0,0)" returns above message.
I've found a lot of other references to this error using Google but I'm having trouble making sense out of how they apply to what I'm doing.
Here's the VBA error I'm getting at compile time: "Function or interface marked as restricted, or the function uses an Automation type not supported in Visual Basic."
VBA Code that causes the error:
'ftp is also a com object created in code not posted here Dim f() As wooxter.FTPFile f = ftp.GetFileList 'Returns an object array of type FTPFile
But I get a runtime error that Operator '=' is not defined for types 'Object' and '1-dimensional array of DataRow' There should be an easy way to do this that doesn't involve creating new tables, etc.
I have a string containing many lines. Each line has many values separated by commas. Basically it's in CSV format. The number of lines is variable but the number of columns is always 7.
I can get each line into a one dimensional array using Split(Var, Chr(10)).
I'd like to make it a two dimensional array where the second dimension contains each comma separated value.
I've got
Dim VarArray1() As String = Split(VarText, Chr(10)) Dim VaryArray2(0 To VarArray1.Length - 1, 0 To 6) As String
Is there a quick way to get the contents of VarArray1 into VarArray2. I know I can do the following.
For Counter = 0 to VarArray1.Length - 1 Dim line as string = VarArray1(Counter) Dim Values() as string = Split(line, ",") For Counter2 = 0 to 6 VarArray2(Counter,Counter2) = Values(Counter2) Next Counter2 Next Counter
But is there a quicker way to do it that doesn't require passing through each element of VarArray1 and then passing through each element of Values.
The eventual goal in all of this will be to find the highest value in the 3rd column (the arrays are strings at this point because not all columns are numeric). To do that once I get the values into VarArray2 I suspect I have to pass through each element VarArray2, i.e. VarArray2(Counter,2). Unless I can copy the whole third column into a SortedList?
I'm trying to re-write an old VB 6 OCX into a VB.net DLL and I'm having problems accessing the object returned from a COM object. Here is a snippet of the old VB 6 code: Dim objResult as Object
What's the difference between using the in out attributes in a interop method call such as SomeWIN32APICall(<[In],Out> Byval SomeVariable as SomeType) Vs SomeWin32APICall(ByRef SomeVariable as SomeType)? When I use the latter my app crashes.Edit: Fixed Typo
like an Interop user control (VB.NET) to return and to accept multiple values from a get/set call. I assumed a user defined type (UDT), would be the correct way but I keep getting a "Variable uses an Automation type not supported in Visual Basic¯ from the VB6 compile. How is passing multiple values between an interop control and the VB6 application done?VB.NET (Interop) code, a control with a .NET ListView
Structure Employee Dim Firstname As String Dim Lastname As String
I am having a problem understanding the following error message:
Value of type 1-dimensional array of string cannont be converted to 2-dimensional array of string because the array types have different numbers of dimensions This line seems to be causing the error:
New String((13) - 1) {}
I did a Google search on this but didnt come up with anything useful. I didnt even change the code.I just found this example online and copied/pasted it into a project that Im working on.
All code is listed below!
Calendar.aspx.vb Imports System Imports System.Data
It is working with vb6 but when I used vb.net 2008 it is not working Private Declare Function GetComputerName Lib "kernel32" _ Alias "GetComputerNameA" (ByVal lpBuffer As String, ByVal nSize As _ Long) As Long Public Function ComputerName() As String Dim sBuffer As String [Code] .....
In a Windows Forms Application, since updating to VS2010 SP1 I get the following error in the VS IDE either:when attempting to a open windows form in the designer; orwhen attempting to run the application in the IDE The application and solution builds OK in the compiler. The error message is:Inner exception: "Error HRESULT E_FAIL has been returned from a call to a COM component." System.InvalidOperationException was unhandled Message=An error occurred creating the form. See Exception.InnerException for details. The error is: Error HRESULT E_FAIL has been returned from a call to a COM component.
i have create a setup file with inno software including interop.MessengerAPI.dll of chatting application(with windows live messenger).I have created a setup file with inno of that chatting application.but installed that setup it is work in only my pc it is not work in anather
i have create simple chat application with windows live messenger.I have give reference of essengerAPI type Library.then it works.after creating a setup file with inno software including interop.MessengerAPI.dll of chatting application(with windows live messenger).Install that setup on anather machine then following errors are generates. ( Error HRESULT E_FAIL has been returned from a call to a COM Component).How to avoid or remove this error.?The chatting is not done in windows live messenger.I have give the anather reference ie, Interop.MessengerAPI.dll but same errors will be generates.Interop.MessengerAPI.dll it is supported in windows xp or not?
I prepared simple WebSite with e.g. one button.Next after closing the project, I opened it again - and on the form I have instead of button object with information:"Error Creating Control - Button1Error HRESULT E_FAIL has been returned from a call to COM component"After start the WebSite I can see the button every time, problem is only in the design mode.The same situation I have with other WebSite projects
1) The first function (call it GetValues()) returns values in a SQL database as a list via a stored proc. One of the fields is DateTimeSubmitted. All of this data is displayed on my webpage using a repeater control. It works fine.
2) The second function (call it NiceDate()) I created to change the DateTimeSubmitted to a nice date such as "one minute ago" or "yesterday".
My problem is I have no idea which is the best part of the process to do the conversion (at point of data extraction or in pageload etc.) or in fact how to do the conversion.
Per this UserControl that can be added to a blank form, I would like to use the HorizUnits array below to map custom grid x coordinate from a mouse x position.For a given input value 13, what syntax would I use to obtain a value of 2 where 13 lies between Value 10 and 16 for which 2 (Name) would be the custom grid's displayed coordinate position?
I am automating Word from VB.Net.I open a document by:
Dim msWord as Word.Application = CreateObject("Word.Application") Dim doc As Word.Document = msWord.Documents.Add(Template:=Path)
where path points to a template file I created with a header and a watermark. The template has some bookmarks which I want to dynamically set to some appropriate text values:
doc.Bookmarks("DocumentTitle").Range.Text = "The Joy of Office Automation"
If I comment out that line, the document opens in Word with the watermark, etc, in place. If I let that line execute, it inserts the text as appropriate, but the watermark and other things disappear from the document. You can actually see it flash briefly, and then disappear.FWIW, this is Office Word 2007, and I am opening a .Dot (Word 97-2003) template. The Bookmark.Range.Text I am setting is in the document header.
This should be a fairly common question, but I haven't found a straightforward answer anywhere.
If I instantiate an object within a function in VB.NET and return it, does it return it be reference or by value. IE - should I be worried about performance if I write something like this:
Public Function ret_obj_func() As big_object Dim ret_obj As New big_obj(<lots of stuff>) Return ret_obj End Function
If I call this function from somewhere else, will it instantiate the object in the ret_obj and then create a deep copy to pass back a copy to the caller, Or will it just pass back a reference?
I have a VB6 program which calls a COM method, passing 2 arrays as parameters and expecting 2 arrays to be populated in response.The code is this, where ItemIDs and ItemClientHandles are the input array parameters and MyItemServerHandles and Errors are populated by the COM object.
Dim ItemIDs(2) As String Dim ItemClientHandles(2) As Long Dim Errors() As Long ' Array for returned Item related errors Dim MyItemServerHandles() As Long ' Server Handles for Items
I have a managed class that uses a COM that looks like this.
[Code]....
Since I am using an unmanaged dll through a COM-Interob dll I am wondering if I need free the innerobj manually or if the gc is smart enough to do it automagically if I call ReleaseObject() My class implements IDisposable and I do the following atm: Runtime.InteropServices.Marshal.ReleaseComObject(myobj) Do I need to take care of releasing all inner objects that are created by the COM Object or not? And If I do have to do it, does the order matter (first inner then parent vs parent then inner)?
I developing a roster application (asp.net with VB + sql server) to let user input shift duty record, proposed screen as follows:for the database design, each staff will have one record per day.[code]I want to create a multi dimensional array to bind the gridview.Is that correct that I create a arraylist (for 7 days) and then a subarray for each day? How can I create a 7 dimensional array & sub array under this 7-D array in asp.net + VB ?
I am currently writing unit tests for an application near completion (before management looks at it and turns it inside out). I am testing the business layer and a method is set to return a datatable of all "GroupID"s, which are simply an integer to represent the group that a user belongs to.
I'm assuming the best way to assert on this unit test would be to assert that the correct groupIDs are being returned from a controlled test database. However, I'm not sure how to assert on a datatable. Is the only (and best) possible way to accomplish this to simply loop through the datatable until it's empty and add each value to an array of integers? How would one go about asserting on this test?
If I instantiate an object within a function in VB.NET and return it, does it return it be reference or by value. IE - should I be worried about performance if I write something like this:
Public Function ret_obj_func() As big_object Dim ret_obj As New big_obj(<lots of stuff>) Return ret_obj End Function
If I call this function from somewhere else, will it instantiate the object in the ret_obj and then create a deep copy to pass back a copy to the caller, Or will it just pass back a reference?
I run VS 2010 Premiuim version. I do a lot of data projects and wondered what option i have to setup concurrency if the returned object is a dataset and how do i do it? Does VS 2010 have any built in options for me to take advantage of?Or if anyone else has any other ways of doing this please advise or point me to any articles.
