Convert Datagridview To Datatable?
May 21, 2012I managed to Convert a Datagridview to Datatable, Now problem is the programmatically addded Columns Seem to end up at the end of the of the initial table layout[code]...
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Datagridview Bound To A Datatable Setting Its Datasource Property To The Datatable
May 20, 2011I have a datagridview bound to a datatable setting its datasource property to the datatable. I would like to have a child form that contains a list of columns associated with the datatable that contains a checkbox that will allow the user to hide and show the columns ( I do not know the best control to use here) (I assume this is the easy part as All i need to do is loop through each of the datatable's columns to get the column name)
now I would like save these visible columns on some event like form_closing so that the next time the user opens the form up it will remember the settings
Convert A Datatable Using A Reference Datatable Asp.net?
Apr 26, 2012I am finding difficulties to convert a datatable to a new datatable using a reference datatable. My question is confusing and I am not good at explaining things so I drew a picture (see below).I have two datatables on memory and I need to create the third datatable using the second mapping table for reference. The column names are just for example and it can't be hardcoded.
View 2 RepliesHow To Fill A DataTable With A List(Of T) Or Convert A List(Of T) To A DataTable
Nov 26, 2009I have read many posts on this topic; among them and most recently .NET - Convert Generic Collection to Data Table. Unfortunately, all to no avail.
I have a generic collection of structures :
Private Structure MyStruct
Dim sState as String
Dim lValue as Long
Dim iLayer as Integer
End Structure
Dim LOStates As New List(Of MyStruct) I need to fill a DataTable with this list of structures but have no idea how to go about doing this. I am using vb.net in Visual Studio 2008.
.net - Convert DataTable To Linq?
Feb 10, 2010I'm trying to convert DataTable to Linq using
DIm result = From r in dt.AsEnumerable()
Select new ( col1 = r.Field<integer>("id"), col2 = r.Field<string>("desc"))
But i get error near 'new (' saying type expected.
C# - How To Convert Listview To DataTable
Jun 22, 2012I have seen many examples of populating a listview from a datatable or converting a datatable to a listview but what I am trying to do is exactly the other way around.
How can I convert/copy the contents of a winform listview to a datatable?
[EDIT]
I have a listview with a context menu where users can multiselect items and choose one of the context menu options, I then loop the selected items and extract each selected row (listview item) and serialize it, instead of doing this I wanted to convert the listview to a datatable then add the datatable to a dataset and serialize the dataset.
Convert A DataTable To List (of T)?
Apr 28, 2012convert a dataTable to List(of T).In Vb.net on .Net 3.5 If you know How To or maybe a link of somebody who did it.I check this on c# (from another stack question)
public static IEnumerable<T> ToEnumerable<T>(DataTable dt, Func<DataRow, T> translator)
{
foreach(DataRow dr in dt.Rows)
{
[code]....
but I cant translate Func on .net 3.5?
Convert Csv Data To DataTable?
Jun 20, 2012I am trying to import a large array of integers stored as a csv file into a VB.Net DataTable called BeamMap. The .csv file consists only of integers, with a delimiter of ,, no quotes around the data (ie., 1,3,-2,44,1), and an end of line character of line feed and carriage return. All I want to do is get each integer into a DataTable cell with the appropriate rows and columns (there are the same number of columns for each row) and be able to reference it later on in my code. I really don't want anything more than absolutely necessary in the code (no titles, captions, headings, etc.), and I need it to be fairly efficient (the csv array is approx. ~1000 x ~1000).
View 2 RepliesConvert Xml File To Datatable?
Dec 31, 2009i am using following code to convert xml file to datatable but its just creating multiple tables (but without data) and i want tables with data..
Dim myDS As New DataSet
Dim xmlStream As System.IO.StreamReader = New System.IO.StreamReader(Server.MapPath("~xmldoc
esult_availhotel.xml"))[code].....
How To Convert A Datareader To Datatable
Feb 23, 2012I have a question about converting a datareader to a datatable. In my code, I have a datareader created in one class and passed to another class that I want to convert it to a datatable.
When I do this, it does not seem to work, as the table remains empty. If I do the conversion in the same function, it works fine.
Its only when I pass the datareader to another function that it stops working. Is this because the dr is closed or something? How do I overcome this problem? Any help would be great.
DataGridView Binded To DataTable - Now Sorting DataGridView?
Jan 20, 2011At the moment I have a DataGridView (bindet to a DataTable) and some labels. If DataGridView's event SelectionChanged occurs,the labels should be filled with the information of the selected row -> No problems.But if I sort the DataGridView and click on a row, the informations in the labels are wrong.
Event:
Private Sub DGVMain_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DGVMain.SelectionChanged
If DGVMain.SelectedRows.Count > 0 AndAlso Not Me.DGVMain Is Nothing Then[code].....
Get Datagridview Table Row When Datagridview Datasource Is DataTable?
Dec 8, 2010My application must display some data in Datagridview (status of COM ports communication) and i Used .mdb databases before for faster search and Datagridview update. How i understand Datagridview is importing data from DataTable and data in DataTable is imported from .mdb file, so i decided to make shortcut - stop to using .mdb file (data must be erased every time application start and it is useless make .mdb file and erase it every time, becouse it is increasing even when drop is used) and using only DataTable..
I want to row in Datagridview change it color to red when it's Collumn(6).text countains %error% string..
When Error in COM port is starting, i can fast find row in DataTable for that port and write information that Error accured for that port and DataGridview automatically updates:
Dim RRow as () DataRow
RRow = ds.Select("Port = 'COM3')
RRow(0).Item(6) = "Error Opening COM3"
Asp.net - Getting Error And Cannot Convert String To Datatable?
Jan 27, 2012I am getting this error cannot convert string to datatable
The code is
dt = CType(Session("result"), DataTable)
I am trying to store the session value in dt which is a datatable. The session result contains string values.how to convert the session to datatable and store the session value in the datatable.
Convert A List To Dataset Or Datatable?
Jun 5, 2011I need to convert bindiangsource.datasource (which is a list) to dataset or datatable.
View 1 RepliesDatatable - Convert String To Double?
Jun 21, 2012data table contain column named as Fld_primary. this column contain value like 0.00 it is double datatype in mysql table.i want store that datatable value in double variable. am always getting error when i convert to double datatype.
my code
-------
Dim ds5 As dataset1.DTSUMDataTable = TA5.GetData(users)
Dim dttot As Double
dttot = CType(ds5("fld_primary").ToString, Double)
Error:Conversion from string "fld_primary" to type 'Integer' is not valid.
Datatable Convert To Xml And Export To Excel?
Aug 1, 2012May I know is there anyone did this before? I have the code below: Private Function FnReadWeeklyConsumption(ByVal pstrSheetName As String,
[Code]...
VS 2010 : Convert Datatable To JSON?
Mar 26, 2011I want to be able to turn a datatable or dataset or the results of my SQL queries into JSON - purpose is for a WCF service which will not do it.
View 2 RepliesAsp.net - Extract/convert Information From A Listview (to A DataTable)?
Jan 4, 2010I have a relatively simple Listview that suddenly needs (due to new requirements) to have it's 'layout' extracted to a DataTable so that a common routine can convert it to an Excel spreadsheet for export purposes.The ItemTemplate is just a series of Table Rows with some text, data-bound labels and textboxes with validators in the cells.Usually, when trying to pull out a particular value (like what was entered into a text box), I use the ListViewItem's .FindControl method.
For Each objItem As ListViewItem In lvwOptions.Items
Dim objTextHrsLabor As TextBox = CType(objItem.FindControl("txtHrsOptByLabor"), TextBox)
decHours = CDec(objTextHrsLabor.Text)
Next
In this case, however, I'm trying to take all the data displayed - all the 'rows and columns' of the table that was created.Inside the ForEach / Next loop of ListViewItems, I started a ForEach/Next loop of Controls for each instance's controls but I got some really strange results returned (like controls that had a couple of table cells in them).
I get the sense I'm headed in the wrong direction. All I want is for the nicely-formatted 5-line, 6 column table to be converted to a 5-line, 6-column data table.
Convert 10 Lines With Three Columns Into A DataSet/DataTable?
Mar 8, 2011I'm using vb.net / winforms.How can I convert 10 lines with three columns into a DataSet/DataTable?
View 1 RepliesConvert A LINQ Query Resultset To A DataTable?
Jul 20, 2010How can i write this query with LINQ to a FoxPro database?SELECT count(*) FROM Table group by item1I wrote it as below, but it doesn't work
Dim Query
Dim dt As New DataTable
Dim da = New Odbc.OdbcDataAdapter("SELECT * FROM table1",connection)
[code].....
Convert Datatable Byte Array To Image?
Mar 6, 2009I've created a new access 2007 database + added a OLE Object field, that i've then pasted images into.in vb2008 I've connected to the database + put the table into a datatable. so far it works ok.when i try to convert the byte array to an image, it causes an error:
'A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll'heres the code i'm using[code]....
Convert Single Column Of A DataTable To Program?
Aug 22, 2011Using VB.NET, what is the most concise way to convert a single column of a DataTable to a CSV? The values are integers, so I don't need to worry about character escaping or encoding.
View 1 RepliesDB/Reporting :: Datatable.compute("Sum(Convert?
Oct 25, 2009I need help with this line of code: Me.avgsalespricetxt.Text = Me.dtsold.Compute("AVG(Convert([Selling Price]),'System.Int32'))")
Here is all the code i have so far, I need to Average a column in my datatable from what i have read "Compute method supports expressions and they support CONVERT function that you could use inside of the expression."
[Code]...
LINQ To DataSet - Convert EnumerableRowCollection Into DataTable
Mar 2, 2012I am trying to convert my EnumerableRowCollection into a DataTable, but I can't see the CopyToDataTable method. The enm.CopyToDataTable() has the blue saw tooth line under it with error saying " 'CopyToDataTable' is not a member of 'System.Data.EnumerableRowCollection' ". I have set a Reference to System.Data, System.Data.Linq, and System.Data.DataSetExtensions. I thought the CopyToDataTable method was part of the System.Data.DataSetExtensions, right? Anyone know why I can't access this method?
[Code]...
VS 2010 Convert System.Object To Datatable Or Array?
Jul 18, 2011I'm pulling data from a D3 database, using an api.
The api can do the following: Dim OBJ As Object = mvsp.MVResultSetGetRows.ToArray()
But how do I get that data into a datatable to use as the datasource for a DataGridView?
[2008] Convert Datatable Byte Array To Image?
Mar 6, 2009i've created a new access 2007 database + added a OLE Object field, that i've then pasted images into.
in vb2008 i've connected to the database + put the table into a datatable. so far it works ok.
when i try to convert the byte array to an image, it causes an error:
'A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll'
heres the code i'm using:
vb
Dim arr() As Byte = DirectCast(record.Item(5), Byte())
pic.Image = Image.FromStream(New IO.MemoryStream(arr))
its loading the byte array properly, but the Image.FromStream line causes the error. i've used this method before with an earlier access database + it works.
Convert A JSON Constructed From Table To A Datatable For An Update Query?
Jan 29, 2011I would like to send json data from a HTML table to the ASP.NET code-behind and update the data in and SQL Server database. The code and JSON for the TableProductToUpdate() is below.
function UpdateProductTable() {
$.ajax({
type: "POST",
[code].....
.net - Convert A Datatable To A Data Structure To Be Read By MS Stacked Chart Control?
Aug 18, 2010I have a chart control (stacked chart to be more precise) and a datatable that contains 3 columns. I want to bind them into a stacked bar chart. below is what the datatable looks like:
[Code]...
I would have the Resource column as the x-axis, and the value (hours worked) of each Queue as the y-axis (stacked)I've tried just binding normally and I'm getting an error saying that it's the wrong data type.
Add Checkbox In Datagridview With Datatable In Use
Jun 21, 2010I just want to know on how will I add a Checkbox in each row of my datagridview. First I used a datatable to get all the values from my database and then pass it all to the datagridview. What I want to happen is at the first column of my datagridview there is the checkbox.[code]
View 4 RepliesBuild A Datatable In DataGridView?
Feb 3, 2012i build a datatable in DataGridView. When form open datagridview point to current row is first row
when i call this code :
MsgBox(dgvName.CurrentRow.Cells("drID").Value)