Visual Basic

Dave Kreskowiak29-Sep-06 6:32

29-Sep-06 6:32

You can't add a column at any index you want. Anything you add will always be appended to the end. Besides, a DataTable object has no visible component, so it doesn't matter where the column is appended... Why do you want to do this?

Dave Kreskowiak
Microsoft MVP - Visual Basic

jcrussell2-Oct-06 14:30

jcrussell

2-Oct-06 14:30

I'm setting it as my datagrid datasource.
I'm reading data from several sources in my database. Based on the type of data I'm reading (whether it is Contact data or Business data etc) I wanted to add an icon column to my datagrid. This works fine, except the icon is the last column in my datagrid, I want it to be the first.

I assumed that I would do this at the datatable level, not at the datagrid level.

Jason

Dave Kreskowiak2-Oct-06 14:57

2-Oct-06 14:57

The view of the data is maintained seperate from the data itself. The order of the columns in the datatable has nothing to do with the order of the columns in the datagrid. In order to do this, you'll have to create all your columns, in the order you want, and add them to the grid.

Dave Kreskowiak
Microsoft MVP - Visual Basic

jcrussell2-Oct-06 15:04

jcrussell

2-Oct-06 15:04

so how is this done? I already have my datatable (tblMergedContactsAndCompanies). I want to add a new column at index 0 and then read through all the rows in my datatable and assign an icon depending on Type (Contact or Company) and then display this in a datagrid.

I can add the icon column to my datatable, but when I display it in my datagrid, it is at index(datatable.columns.count).

Dave Kreskowiak wrote:
In order to do this, you'll have to create all your columns, in the order you want, and add them to the grid.

Are you saying that I have to create a new datatable, read the columns from my original datatable in, and then read the data in? D'Oh! | :doh:

Jason

Dave Kreskowiak2-Oct-06 16:32

How to enable checkbox option in Save Dialog Box [modified]

2-Oct-06 16:32

No! You create the DataGrid columns manually and specify which columns they map to in the data source.

Dave Kreskowiak
Microsoft MVP - Visual Basic

vikram13828-Sep-06 23:47

vikram138

28-Sep-06 23:47

Hi,

I am using the following code in codebehind file for creating a saveAs dialog box in webApplication in VB.net.

Dim filename As String = Session("DateTimeStampZip")
Dim fullPath As String = Server.MapPath(ConfigurationSettings.AppSettings("ServerDownload")) & "\" & filename
Dim dataStream As FileStream = New FileStream(fullPath,System.IO.FileMode.Open)
Dim fileLength As Integer = System.Convert.ToInt32(dataStream.Length)
dataStream.Close()
dataStream = Nothing
Response.Clear()
Response.ContentType = "application/octet-stream"
Response.AppendHeader("Content-Disposition", "attachment; filename=" & filename)
Response.AppendHeader("Content-length", fileLength.ToString())
Response.WriteFile(fullPath)
Response.End

My problem is that when I run the above code, I am getting a saveAs DialogBox with (checkbox:Always ask before opening this type of file.) shown in disabled mode..
With disabled I mean, in non-editable mode i.e; I am not able to check or uncheck the box.

When i click on open button in the box, same box pops up second time with the checkbox in enabled mode. Now i am able to open the file.

I want this saveAs dialogBox with the checkbox in enabled mode when I run the code first time and not after I click on open button in the dialog box.

Can anyone workout a solution to my problem..

PLease its urgent...

or any other way to create the dialog box using code in vb.net...

-- modified at 5:57 Friday 29th September, 2006

Re: How to enable checkbox option in Save Dialog Box

Dave Kreskowiak29-Sep-06 6:28

deploying app with xp themes

29-Sep-06 6:28

This is a question best asked in the ASP.NET[^] Forum.

Dave Kreskowiak
Microsoft MVP - Visual Basic

ashhorner28-Sep-06 23:42

ashhorner

28-Sep-06 23:42

Hi,

I haven't posted a question before so I hope that this is the right forum.

I am developing a windows app in vb.net (2002) that I want to have an xp theme. I have read quite a few web articles describing the process for incorporating this and have indeed been successful at getting my .exe file to run with an xp theme. However, I have not been able to deploy the application with an xp theme.

My progress so far: I built the assembly manifest, given it the right name, called it “RT_MANIFEST” and an ID of 1. I then added it into the .exe file located in my ‘release’ folder manually, and when I then execute the .exe it works fine. I know that I have to manually add the manifest every time I build the project.

When I then come to deploy the app it does not keep the xp theme, even when I test run it on an xp PC set up to run xp style. I am not rebuilding the app project, just the deployment project so I don’t think a rebuild is the reason.

I have tried embedding the manifest into the .exe located in the ‘bin’ directory, but when I try to run this .exe I get an error message saying that the assembly is incorrect.

Any help would be really appreciated as I am completely stumped.

Thanks,

Ash

ash

Bitwise Enum and the <Flags()> [modified]

Alsvha28-Sep-06 22:08

Alsvha

28-Sep-06 22:08

I'm messing about a bit with Enums and combining them via (bitwise) OR and AND so I can assign multiple values to the Enum-types, but I am having some conceptual problems. I noticed in the msdn documentation that there was a <Flags()> attribute which could be set to your enum.
If I look at the msdn for <Flags()> it states: Indicates that an enumeration can be treated as a bit field; that is, a set of flags.

However my code seems to be indifferent to whether i assign <Flags()> to my Enum or not, hence my confusion? It seems to be able to handle both the OR and the AND with and without <Flags()>.
Can anybody give a quick explanation or point me to an article/ressource which explains this?

Thanks in advance Smile | :)

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127.0.0.1 - Sweet 127.0.0.1

-- modified at 4:13 Friday 29th September, 2006

forgot to ignore html tags Blush | :O

Re: Bitwise Enum and the <Flags()>

Dave Kreskowiak29-Sep-06 6:25

Re: Bitwise Enum and the &lt;Flags()&gt;

29-Sep-06 6:25

Alsvha wrote:
However my code seems to be indifferent to whether i assign <flags()> to my Enum or not,

It would help if we could see your code and what you're trying to do!

Combining flags is always done with an OR, not an AND. To check to see if a bit is turned on, you use AND:

Public Class Form1
 
    <Flags()> Public Enum AccessOptions As Byte
        None = 0
        Read = 1
        Write = 2
        Delete = 4
        Query = 8
        Sync = 16
    End Enum
 
    Private Sub Button1_Click(blah, blah) Handles Button1.Click
        Dim MyOptions As AccessOptions
 
        ' Turn on multiple options
        MyOptions = AccessOptions.Read Or AccessOptions.Write Or AccessOptions.Sync
 
        ' Now check for each option being turned on.  There are a few different ways
        ' of doing this!
        Debug.WriteLine("None  : " & (MyOptions = AccessOptions.None) )
 
        Debug.WriteLine("Read  : " & ((MyOptions And AccessOptions.Read) > 0) )
        Debug.WriteLine("Write : " & ((MyOptions And AccessOptions.Write) > 0) )
        Debug.WriteLine("Delete: " & ((MyOptions And AccessOptions.Delete) > 0) )
 
        Debug.WriteLine("Query : " & ((MyOptions And AccessOptions.Query) = AccessOptions.Query) )
        Debug.WriteLine("Sync  : " & ((MyOptions And AccessOptions.Sync) = AccessOptions.Sync) )

Dave Kreskowiak
Microsoft MVP - Visual Basic

Alsvha1-Oct-06 21:16

Alsvha

1-Oct-06 21:16

Hey.
Thanks for the reply, but my issue is that it doesn't seem to matter if I use the "<Flags()>" or not:

<Flags()> Public Enum AccessOptions As Byte
None = 0
Read = 1
Write = 2
Delete = 4
Query = 8
Sync = 16
End Enum

seems to work like

Public Enum AccessOptions As Byte
None = 0
Read = 1
Write = 2
Delete = 4
Query = 8
Sync = 16
End Enum

for my bitwise comparison and funtionality. Thus me being somewhat puzzled.

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127.0.0.1 - Sweet 127.0.0.1

Re: Bitwise Enum and the &lt;Flags()&gt;

darkelv2-Oct-06 0:06

darkelv

2-Oct-06 0:06

How do you represent both Read and Write allowed in your second example?

Re: Bitwise Enum and the &amp;lt;Flags()&amp;gt;

Alsvha2-Oct-06 1:09

Alsvha

2-Oct-06 1:09

I have made this example to mess about with it, which was where I found this issue: (please ignore bad naming as it is just a test project Smile | :)

)

I have this enum:

Public Enum MyType As Integer<br />
       TypeA = 1<br />
       TypeB = 2<br />
       TypeC = 4<br />
       TypeD = 8<br />
       TypeE = 16<br />
   End Enum

(withouth <Flags()> )

I then "OR" some choices together and place them in a variable of the type of MyType.
This then results in some interger value depending on the choices.

Then I can check if a type is added to my object:

Dim result As MyType = mEnuType And examineType<br />
      Return result = examineType

where mEnuType is the combined type variable and examineType is the one I try to check if contains.

I can remove added types by using XOR and all that, and all seems to work flawless. Withouth using the <Flags()> with my Enum, hence my confusion.

If I read the documentation (msdn) for <Flags()> it seems to indicate that I need it to do these bitwise functionalities, however this testing seems to indicate I do not, and I can't figure out what I am doing wrong?

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127.0.0.1 - Sweet 127.0.0.1

Passing Value from Form 2 to Form 1

khwo28-Sep-06 18:58

khwo

28-Sep-06 18:58

Hi All,
Can anyone give me some advice how to pass the value from Form2 to Form1? For my project, user will click on the button at Form1 then Form2 will show, after that user will double click on the record at listview in Form2 and then Form2 will close, then the record select by user at Form2 will pass back to the Form1 and display at text box. How should I do for this situation?

jonniebigodes28-Sep-06 19:20

jonniebigodes

28-Sep-06 19:20

i'm not in front of pc with visual studio, but here's some pointers to get you in the right direction....
if you have a module in your solution...
declare a public variable to store the data you want.
assign the listview item to the variable,close the form and show form2, then on form load event give the textbox .text property the value of the variable

Christian Graus28-Sep-06 19:29

Christian Graus

28-Sep-06 19:29

If you want to write bad code, use a global variable. Otherwise, you should set up a delegate in form2, and hook it to a method in form1. Then, Form2 can call code in Form1 whenever it wants to pass a value.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

jhoga29-Sep-06 8:07

jhoga

29-Sep-06 8:07

I find that an interesting statement. Why would you consider using a global variable "bad code" as opposed to using a delegate?

Christian Graus29-Sep-06 10:03

Christian Graus

29-Sep-06 10:03

Because it's a quick and dirty fix that breaks encapsulation. I know in VB6 such things were common, but in OO programming, it's not how things are done.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog