Returns The Property Names As Column Headers And Empty Fields?

Jun 14, 2009

why this code returns the property names as column headers and empty fields?

Dim table As New List(Of SalesPersonClass.SalesPersonClass)
Dim i As Integer
For i = 0 To salesPeople.GetUpperBound(0)
table.Add(salesPeople(i))
Next
dgSalesPeople.DataSource = table

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MySQL 'UPDATE' Command Returns As Empty Fields?

Feb 27, 2011

I am building a vb.net application for a client, and there is a problem. I am connecting to a mySQL server, and using the UPDATE command to update certain fields to the specified values, however, once I run this code, the fields on the mySQL server turn EMPTY. Here is my code :

Sub updateresidents()
'MAKES NO SENSE; UPDATES EMPTY FIELDS ON mySQL SIDE??!!!!!!!!!!!!!!!!!!
Dim connection As MySqlConnection

[Code]....

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LINQ Projections - "Friendly Names" - Use For Column Headers

Mar 25, 2009

In LINQ, I'd like to project different names than those from the database tables. "Friendly names" that I can use for column headers. Names that have "%" or possibly a " " (space). The query below won't compile.

Is something like that possible or am I stuck using the dreaded _ underscore for everything?

CODE:

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Row Headers Of Datagridview Are Empty On Formload

Apr 6, 2009

I use a datagridview where the rowheaders frustratingly stay blank after I load the form. If I modify/add/delete anything the rowheaders pop up. then when I sort by clicking on a columnheader the rowheaders become blank again. all these actions (load/add/modify/sort) go through the same refresh function. I can't seem to figure out why the rowheaders sporadically show up. they should stay visible all the time. btw, datagridview.refresh() doesn't work

[Code]...

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Set The Column Names To The Same Values As Table Names Yet The Data Is Not Showing In Form Load?

Aug 15, 2011

I have a DataGridView which populates from an SQL query just fine in default mode

using these table names
[firstName] [varchar](20) NOT NULL,
[lastName] [varchar](20) NOT NULL,

[code]....

I have edited the column headers and set the column names to the same values as my table names yet the data is not showing in form load I have set datagridview.AutoGenerateColumns = False I know the data is there if I delete datagridview.AutoGenerateColumns = False then the data is shown with the default headings?

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.net - GetPrivateProfileString() Returns Empty String Despite Having A Default?

Jul 9, 2010

Private Declare Function GetPrivateProfileString Lib "kernel32" Alias _

"GetPrivateProfileStringA" (ByVal lpApplicationName As String, _
ByVal lpKeyName As String, _
ByVal lpDefault As String, _
ByVal lpReturnedString As String, _
ByVal nSize As Integer, ByVal lpFileName As String) As Integer
Dim value As String = ""
Dim length As Integer
Dim IniFileName As String

GetPrivateProfileString("Config", "UserName", "None", value, length, IniFileName)

but value contains an empty string I confes to being a VB n00b, less than a week, in fact, but I can't see what's wrong there. The file exists, it contains a section called "Config" which has an entry called "UserName" with a value - but even if not, wouldn't value take the default?

Edit: It's not returning an empty string - it's returning whatever I initialize value to before calling GetPrivateProfileString().

Which is to say that if I Dim value As String = "xxx" then it stil contains "xxx" after the call and not the default value.

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GetPrivateProfileString() Returns Empty String, Despite Having A Default?

Oct 25, 2009

Private Declare Function GetPrivateProfileString Lib "kernel32" Alias _
"GetPrivateProfileStringA" (ByVal lpApplicationName As String, _
ByVal lpKeyName As String, _

[code].....

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Allow Hard Returns And Bullet Points In All Text Fields?

Mar 15, 2011

I need to allow hard returns and bullet points in all Text fields

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MS Access Adodb In NET Returns 34 In Fieldcount When Table Has 42 Fields

Apr 12, 2010

Why MS Access adodb in .NET returns 34 in fieldcount when table has 42 fields ?I see 42 fields in table of my MS Access mdb database. But ADODB layer in .NET sees only 34 fields. The Outofrange exception occures when I am calling method getOrdinal("FieldName") of reader class.

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Returns The Value Of The Text Fields Back To The Main Routine?

Feb 6, 2010

How can I implement a sub routine or function that does a test for number validation in text fields and then also returns the value of the text fields (if they were valid) back to the main routine?

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How To Create Column Headers

May 4, 2012

i want to create column headers now in my first array have this [URL]

array
CSC238,8.00-9.50
MAT183,1.00-2.00
ECO120,2.10-4.00

[code].....

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.net - LINQ Query Returns List Of Empty Objects?

May 3, 2012

I have a query that 'selects' object of a type:

Dim l as IList(Of Foo) = (From dataRow As DataRow In table.Select()
Where CStr(dataRow("Column1")) = "A"
Select New Foo(CStr(dataRow("Column1")), _
CStr(dataRow("Column2")))).ToList()

What's happening is that if i set a break-point to the constructor of Foo and step, the constructor is hit and the parameters are loaded with the arguments. However, l has empty Foo objects (the members in every object are Nothing). What could be happening here?

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TreeView.nodes Sometimes Returns An Empty Node Collection?

Jul 1, 2009

treeView control which has been plaguing me for the last few days.

I'm not exactly sure what is causing this problem to arise, so I will just explain what my program is trying to do.

I am building an application which will have plugin support. I have created a Plugin interface, which is implemented by each plugin, as well as a host interface, which is implemented only by the host application.

Each plugin has an Action subroutine, and when finished, it is supposed to call the ExecutionComplete subroutine in the host interface.

Now, onto the problem. I have a treeView on the host form, which has several nodes in it. If I create a button on the form which displays a message box with treeView.nodes.count, it shows up fine, and everything works as expected. If I attempt to display the same messagebox from the ExecutionComplete subroutine, it also gives the correct number of nodes.

This is where things get a little weird. I have implemented a save feature into my program, so you can save and load data. For some weird reason, if you have loaded the data from a file, rather than adding each node manually, it now returns an empty node collection ONLY if I try to access it from ExecutionComplete. If I try to access the nodes from a button, it still returns the correct values!

What could it possibly be about the ExecutionComplete subroutine that makes it return a value any different than what is returned when the exact same code is placed in a button click event? And why does it only happen when I've loaded the data from a file? I just don't understand how loading it from a file is any different than them adding the nodes manually. The nodes are definitely being added, as I can see them, and the button click event can also see them. Also, ExecutionComplete is obviously able to read the contents of the treeView, because it works just fine if the user has set up the treeView manually.

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Txt To Rtf Folder Coversion, Returns First Rtf File Content Empty?

Nov 25, 2009

i'm having a problem w/this conversion code. as the title describes, the first file converted returns w/empty content, but w/the file name.the rest of the files are ok. here is the code, just paste in form and run.. i meant, run the app. ;o)

Public Class Form1
Private btn As New Button With {.Location = New Point(0, 0), .Size = New Size(59, 23), .Text = "txt folder"}[code]...

i just need to convert the files and have them return complete.there is an invisible richtextbox, which i needed to show files being converted in a past project..now, i need to get rid of that richtextbox if possible. too much extra work for a user's p.c...i am not at all familiar with changing extensions, etc..

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Column Headers Not Visible Datagridview?

May 27, 2012

I am populating a datagridview with data from a table and some unbound columns This is a large table and I want the form to fill the screen and the datagridview to fill the top half of the form. To do this, I have put a panel on the top and a panel at the bottom.I have anchored the dgv to the top left and docked it to the toplumnHeaderHeightSize is AutoSizehe issue is that the ColumnHeaders are not visible unless I click on the restore down button on the top right part of the screen

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Import CSV File Where Column Headers Are In Row?

Aug 31, 2010

I have a csv file that is being sent to me in this format[code]...

This is the only way this file can be exported from the system that is sending the information.

The second item is the Header and of course the 3rd would be the value that needs to be inserted into the row. How do I import a file like this. It is going to be sent to me every 5 minutes so I have to be able to extract the data shortly after the file arrives and insert it into Sql server.

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Option To Hide Column Headers?

Mar 17, 2009

In VB6, listview had HideColumnHeaders property. I'd like to use this in VB 2005, but that property does not exist.

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Parse A CSV File That Has Column Headers?

Mar 22, 2011

What I'm trying to do is parse a CSV file that has column headers, and map those headers - ideally to a class.The tricky part is that I need to be able to support various mappings because it will be interacting with different systems that give the headers different names. Additionally, being able to combine fields would be extremely helpful.

Fortunately, the CSV will always be correctly formatted with all fields encapsulated in double quotes.

[Code]...

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Screen Shot Has A Column And Row Headers?

Dec 19, 2011

Having an issue with a Datagridview that I am trying to create. What I need is for not only column headers but row headers. If you are not sure what I mean, take a look at this image;

[Code]...

Notice how the screen shot has a column and row headers? Now I do not need the "view selector". To make matters worse I need to have two row headers. Kind of like this;

[Code]...

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ButtonColumn In DataGrid Returns Empty String When Call .Text

Mar 9, 2011

I get an empty string when calling the .Text property. Refer below for snippet:[code]The internet search advises to use Items(col).Cells(2).FindControl(..), the problem with that is FindControl finds the control by ID, BoundColumn doesn't allow you to insert an ID for it.

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VS 2010 Testing For Empty Fields?

Mar 14, 2011

I used to run into problems with this in VB6, too...

If Not ds_Students.Tables(0).Rows(0).Item("ClassDay2").IsNullOrEmpty Then
txtClassDay2.Text = ds_Students.Tables(0).Rows(0).Item("ClassDay2")
End If
This produces "Public member 'IsNullOrEmpty' on type 'DBNull' not found."

And is there a different test for fields of different data types?

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Add Combo Box Items FROM Datagrid Column Headers?

Nov 10, 2009

Using Visual Basics Express 2008, I am trying to add items to a combo box FROM column headers in a datagrid in a separate form. I have written the code to create the datagrid from an external file but can not get the headers of that datagrid to populate the combo box in a separate form.

Here is my working code for Form1 (frmMain):

Private Sub cmdConvertTxt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdPart.Click
Dim dt As New DataTable

[Code].....

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C# - Dynamically Populating Column Headers In A Gridview?

Mar 6, 2012

I have a vb.net website with a gridview that currently has exam questions displaying vertically in each row like this:

Name question answer
-----------------------
Joe question1 answer1
Joe question2 answer2

[code]....

But I would like to change it, so that each question is a header, like this:

Name question1 question2 question3
----------------------------------
Joe answer1 answer2 answer3
Jill answer1 answer2 answer3

This makes it more readable since each user is only listed once.I would like to stick with a gridview instead of rewriting all my code.I am actually binding my data to the gridview via some other programmers class. I am using LINQ like this:

Return (From entry In report.FetchAllEntries()
Select questionID = entry.Question.QuestionID,
userID = entry.Session.User.ID,

[code]....

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CheckedListBox With Multiple Columns A Column Headers?

Mar 26, 2010

I need to create a checkedlistbox that has multiple columns and each column has a header. Is this possible? I can't really find much on Google. Here's the headers I need:

Checkbox Title Existing path Destination path

I have created these columns to the checkedlistbox I have in my form, but when it is run the headers don't show up. Also the items I'm adding don't seem to abiding to the column widths I put in. Also with the code I'm providing below the items don't display as multiple rows, meaning each item doesn't get displayed on a new row, but in a new column.

vb
For i = 0 To iMovies
Movie = New MovieItem()
Movie.tmdbid = CInt(StrBetween(moviestag, "<tmdbid>", "</tmdbid>"))

[Code].....

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DataGridView Inserting New Row When Filling Column Headers

Jun 13, 2010

DataGridView inserting an extra row every time I populate with data. The row appears even if I only fill the column headers. This is causing problems when I try to get values of each cell. Is there a way to avoid this perhaps in properties?

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Export Excel From .net Datagridview With Column Headers?

Jan 27, 2011

I am using this code i found from links on this site to export data grid information to excel. it works great! I am trying to figure out how to first write the column headers to excel and then the data in the columns.

Private Sub exportExcel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles exportExcel.Click
Dim xlApp As Excel.Application
Dim xlWorkBook As Excel.Workbook

[code].....

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Export Excel From Datagridview With Column Headers?

Mar 30, 2010

Export Excel From Vb.net Datagridview With Column Headers

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Initialize Column Headers In Text File?

Feb 11, 2010

Background: Users fill out a form that has 14 fields (radio buttons, checkboxes, textboxes, or listsboxes) in it. I have these fields populate into array list for each field. When the Write and Exit button are clicked the information in the arrary lists are combined and written to the text file that was appended when the form loaded.[code]...

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List From OpenXML Excel Column Headers

Jun 22, 2010

I am using VB.net 2008 express edition. I have figured out how to use some of the code snippets for the open xml sdk to create a drop down list of all the sheets in an excel file. I can also use the code snippet to get the value of an individual column header. What I want is a drop down list of all column headers. I could create an array containing the alphabet and loop through each column based on the alphabet letter in the array. I would then just exit the loop on the first column with no value returned for column header...but there must be an easy way to return all headers in one query of the xml.

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VS 2010 - How To Create Column Headers In Timetable

May 4, 2012

I want to create column headers. Now in my first array have this

array
CSC238,8.00-9.50
MAT183,1.00-2.00
ECO120,2.10-4.00
BEL311,4.10-6.00
MAT183,8.00,9.50

Then second array, I want to do like this

array
8.00-8.50
9.00-9.50
10.00-10.50
11.00-11.50
12.00-12.50
1.00-2.00
2.10-3.00
3.10-4.00
4.10-5.00
5.10-6.00
6.00-7.00
7.00-8.00
8.00-8.50
9.00-9.50

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