I am creating a DB application using the DataSources Wizard to create a strongly typed DataSet. Let's say that I'm working with the Employees Table of the Northwind DB, and my code is like this:
Dim nWindDs As New NorthwindDataSet
Dim empDT As New NorthwindDataSet.EmployeesDataTable
Dim empTA As New EmployeesTableAdapterempTA.Fill(NorthwindDataSet.Employees)
'Fill the Datagridview:Datagridview1.DataSource = nWindDs.Employees
I have a scenario where-in I have a DataTable with certain columns "Col1, Col2, Col3". I want to copy just "Col2, Col3" into another DataTable which has a primary key "ID". What is the best way to copy them. There are 5000+ records and performance is a key factor.I tried with Select, DefaultView.RowsFilter but no success. I know one option is to loop through all records an copy data one by one in second DataTable. But wanted to know a better way.
View 1 RepliesIs there a simple way to assign a populated datatable's columns to another empty datatable? That is, I want to copy a datatable's structure only but not its data.
View 6 RepliesI am getting array of selected datarows from a datatable.select.I use the commands below to get that array or datarows
Dim foundRows() As DataRow
strExpression =
Here is what I tried.I have looked at examples by MS but they all just write to the screen and I have no interest in that.
For Each rowWork In foundRows
dtWork.Rows.Add(rowWork)
Next[code]....
"LineOfBusiness = 'CPP'"
foundRows = modXchange.pdtWork.Select(strExpression)
Now, I want to place the rows from foundrows into an empty data table.I did what I thought was the obvious but that only returns a bunch of rows with no data
I have a datatable property called prpParametersTable in a class called clsBatch. I have a procedure that sets a datatable variable called dtP equal to prpParametersTable at the beginning of the procedure. I then add three new columns to dtP.Here is my problem. When I add the three new columns to dtP my original table prpParametersTable also gets those columns added to it, why? I only want to add the three columns to dtP and not prpParametersTable. How can I do that?
Private Function prvfnc_InsertBatchParameters(ByRef cnn As SqlConnection, ByRef trans As SqlTransaction) As String
' set new columns that have BatchID, Insert DateTime, and UserID for the SQLBulkCopy method below
Dim clm As DataColumn
Dim dtP As DataTable = clsBatch.prpParametersTable
[code]....
I have a gallery which holds a large number of thumbnail images and I want to show 6 at a time.
I have this working using the code below, but I can not get the images to display as 2 rows of 3 - it shows as 6 rows of 1.
I can get the desired result by using a datalist but that stops the pageindex function from working.
I'm sure there's an easy solution but I can't figure it out.
<asp:GridView id="GridView1" runat="server" AutoGenerateColumns="False" AllowPaging="True" PageSize="6" onpageindexchanging="PageIndexChanged" PagerSettings-Mode="NextPrevious" PagerSettings-NextPageText="Next" PagerSettings-PreviousPageText="Previous">
[Code].....
This is a follow up to my previous question: Filter DirectoryInfo files by date in asp.net
I have a gridview that is populating data from DirectoryInfo. However, I only want to display certain columns, and customize the column names and the hyperlink value in the row.
My code is:
Dim files As FileInfo() = New DirectoryInfo(strDirectoryPath).GetFiles().Where(Function(x) x.LastWriteTime >= (dtStartDate) AndAlso x.LastWriteTime <= (dtEndDate)).ToArray()
[Code]....
How can I loop through the columns, to display only "name", "extension" and LastWriteTime?
displaying columns from my ms access table to a listview in vb.net..i use oledb in connecting to ms access..
View 2 RepliesI'm trying to write a jukebox application as part of my undergraduate coursework at university, and have hit a brick wall. Using while loops, I'm trying to display tracks/songs under particular genres, as listed in a simple text file, from which the programme reads.The issue is, although I can get the columns to be named after the appropriate genres, as stated in the text file, the songs are read, and placed in the first column, regardless. I can't seem to get them to move to the next column, when the previous genre is finished.[code]
View 15 RepliesI am making a change to some code written in vb.net, its a winforms app. The menuitem uses the System.Windows.Forms.MenuItem control. I need to display the values in that drop down menu into 2 columns. It displays a number of items and therefore is too long.I wish to display the items side but side in 2 columns. In C# you can use ToolStripMenuItem which allows you to display multiple columns. Even though ToolStripMenuItem is available in Vb.net its difficult for me in the current app to switch to that tool.
View 3 RepliesI'm making a console game that shows some data:
#: Item Name Item Slot Cost Item Price
in that order. The thing I want to do is to make it come out in nice even columns...but I can't seem to make it do that. It comes it out in nasty uneven rows that don't look attractive...
Basically, here's what it looks like now:
1. Sword Slots: 2 Price: $40
2. W. Stick Slots: 4 Price: $1
I want to get each column to line up nicely with the other (since I control the size name).
i have a datagridview table ("Bookingen") that is bound to an acces datatable
this table ("Bookingen") has columns
an i also have another form that alows people to add info like a registerform
what i would like is that when adding the info by button click
a column with the name of the person from registerform displayes in datagridview ("booking")
this my code so far
Public Class nieuw_personeel_invoer_code_
Private stroledb As String = "SELECT* FROM Loginnummer"
Private strconnection As String = "provider= Microsoft.ACE.OLEDB.12.0; Data Source=D:clifs project21.accdb; persist security Info=false;"
[Code].....
How can I get a sum for all the columns in a datatable? Say I had the following table. How can I calculate the "total" row? It should be easy to add total row to a datatable.
Columns hits uniques sigups, etc...
Rows
1 12 1 23
2 1 0 5
[Code].....
I have a DataTable oDT. oDT is populated from SQL Server with 6 columns including a column "bAAA" of varbinary(200) I have a function fx(ByVal byteArray As Byte()) as String I would like to add a calculated column to oDT something like this:
oDT.Columns.Add("sAAA", GetType(String), fx(bAAA))
'bAAA is not declared
oDT.Columns.Add("sAAA", GetType(String), fx("bAAA".ToArray))
[Code].....
Since now, I have the following:
vb
Dim x = ( _
(From row In _Obj_DataSet.Tables(TableName).Rows() _
[code]....
I fill a data table with 11 columns and 1 row.
Columns/ User Pass
Row / **User2054** 1234
I have a Label named lblUser and I want to put the value=User2054 from my Table(Collumn[0], Rows[0]). How I can fill it?
I currently have a datagridview that is built from a datatable So lets say we have 6 columns
A B C D E G
So the users will select there data from another program and paste into the the table. So lets assume that the data that is pasted is; (the column names are automatically put in)
A B C D E G
123 456 789 101 112 134
So the table will now look like following (I remove the first row because its the same as the column name)
A B C D E G
A B C D E G
123 456 789 101 112 134
My problem is that the users can rearrange thier tables(column index) so lets say user A has the table in this format
A B D E C G
123 456 101 112 789 134
So when they paste into the program, it will look like
A B C D E G
A B D E C G
123 456 101 112 789 134
So now "C" "D" "E" are incorrect and i need to swap those columns to be the same as the column name. I'm not sure how to attack this problem.My thoughts were to paste the data as is, than see what the first row in each column equals.so if it equals "A" assign it an index 0
B 1
C 2
This seems theres too many steps and will slow down the app...
I have a Datatable- table1 and i want to sort/order this datatable in ascending order depending on 2 columns-column0,column1 of table1. how can i do that?
View 2 RepliesI have a Datatable- table1 and i want to sort/order this datatable in ascending order depending on 2 columns-column0 ,column1 of table1.how can i do that?
View 2 RepliesI have one datatable. In that table I have columns named [Total Day], [Present day], and [leave].
Data are as follows:
[Total Day], [Present day], [leave]
30 25 5
30 26 4
Now i want to concatenate those three columns in one another column. I want output something like this:
[Total Day] [Present Day] [Leave] [TotalDay PresentDay Leave]
30 25 5 30 VBCrLf 25 VBCrLf 5
30 26 4 30 VBCrLf 26 VBCrLf 4
I have list of columns in DataTable to be added in list view. I have specified to the listview of columns in the order to appear and Datas as well.[code]
View 1 RepliesIs there a way to add columns in a datatable to the intellisense of the datatable? Is there a way to display the columns of a datatable in a datagridview?
View 5 RepliesQuestion: I'm exporting a System.Data.DataTable to XML.So far it works fine.But I want to have all the data in attributes, which works fine as well.But my problem now, if in one column, all rows are NULL, no empty attributes are written.So if I read the XML back to a DataTable, it lacks this column...How can I force write all columns even when they are empty ?(DataType not necessarely string)
public void ExportTable(string strDirectory, DataTable dtt)
{
using (System.Data.DataSet ds = new System.Data.DataSet()) {[code].....
I want to change the DataType of all columns of DataTable. I don't want use the loop.. [URL]
View 6 RepliesThis doesn't seem like something that should be confusing or difficult, but I'm having a hard time finding the answer to this problem. I want to copy columns with their data, not rows, from one large DataTable to a smaller one.I have a DataTable with many columns of data (around 20), and a string array of the columns (4 ) that I want in the copied DataTable. Is there a reasonable way to accomplish this task?
View 1 Repliesi want to make a datagrid with 2 columns and many rows
the columns i want to have databinding with a datatable
i want the 1 row 1 column of datagrid have data from 1 row of datatable
i want the 1 row 2 column of datagrid have data from 2 row of datatable
[code].....
[code]How can I skip certain columns of the gridview? For example: Columns 1, 3 and 6.
View 1 RepliesI have set up a series of loops to construct a series of tables dynamically using a cloned table. Each table represents the output for a particular year. These work fine and create the correct output. However, I want to put the total of a particular column in these tables into textboxs on my form.
View 3 RepliesWhen adding a column to a datatable. I can specify a type as one of my overloads such as
dt.Columns.Add(New DataColumn("UID", Type.GetType("System.Int32")))Why can't I use
dt.Columns.Add("etwe", TypeOf(Integer)) when I thought integer is a type. Instead its telling me that integer is a type and can't be used as an expression.
I am wondering if it is possible to iterate using columns of datatable.
I have tried something like this:
Dim myCol As New DataColumn
Dim myRow As DataRow = Nothing
Dim myCell As New DataGridCell
[Code]....
