Next Row In A Datatable Loop?
Jan 7, 2009Just curious is there a "next row" method when looping through a datatable? Basically, I want to be able to go to the next row without having to go to the end of the loop. See my coded example:
[Code]...
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Loop Datatable And Select Checkboxlist Item Based On The Datatable Field Values
Aug 18, 2011I am trying to display value of the field ("UserID") for every row exists in datatable to checkboxlist(make the checkboxlist item selected).
I used for loop, but only the field value from last row of RoleUsers table is selected in the checkboxlist.
Here is my code
Private Sub DisplayRoleUser()
Dim conn As SqlConnection
Dim cmd As SqlCommand
[Code].....
How To Fill DataTable Via For Loop
Feb 23, 2010I am using a SQL query to fill a datatable from 2 associated tables. The first table has Products and the second has associated addonpackages. When I loop through my Products I am able to get all of the addonpackages for the first product but after that the datatable is only getting populated with the last addonpackage for each product. ie:
product 1 - all 6 packages are added tp the datatable
product 2 - only package 6 is added to the datatable
product 3 - only package 6 is added to the datatable
...and so on
My query follows. Why I am getting all of the info for the first product but just the last item for all others. No matter which product I would query first, I get all of the associated data with it but only the last for all others.
SELECT Products.ProductNumber, Products.Name, Products.Mnemonic, AddOnPackages.PackageNumber,
AddOnPackages.Name AS PackName, AddOnPackages.Mnemonic AS PackMnem
FROM AddOnPackages RIGHT OUTER JOIN
Products ON AddOnPackages.ProductNumber = Products.ProductNumber
WHERE (Products.Name = @ProdName)
ORDER BY Products.ProductNumber, AddOnPackages.PackageNumber
Loop Through The Rows Of A Particular DataTable?
Jan 9, 2009IDE : VS 2008,Platform : .NET 3.5,Here is my DataTable columns :ID Note DetailI want to write sth like this :
View 8 RepliesSet Value For All Rows In DataTable Without For Loop
Feb 21, 2011I'm trying to set the same value for all rows for a single column in a datatable without using for loop. Any faster methods to achieve the same.
View 2 RepliesAsp.net - Loop Through Datatable To Create A String?
Feb 23, 2011I want to loop through my datatable column called SDESCR and created a string that looks like this.
Dim labels As String() = {"North", "South", "East", "West", "Up", "Down"}
this is what i am trying and it is not working
Dim labels As String()
For Each row As DataRow In tablegraph.Rows
labels = labels " ' " + row.Item("SDESCR") + " ',"
Next row
Error Loop Through The Rows Of A Particular DataTable
Nov 17, 2011i want to read table row by row i have table with two columns but i want to read the first column only row by row her's my code
Dim col As String = "SELECT users.user1,users.valueid FROM users"
Dim cmd As New OleDbDataAdapter(col, CON)
Dim ds As New DataSet
[Code].....
How To Use For Each Loop For DataTable In Access Database
May 30, 2012I have an Access Database "WPS" with a datasheet "CompartmentDescription" having "CompartmentName" as one of the columns. I want to use each element of the column. How do we retrieve the data Using "For Each" loop.
View 1 RepliesInsert A DataTable Into A DataBase Without A Loop?
May 23, 2010I have created a gridview to allow users to type two fields in each row after that I added the user data into a DataTable now I want to insert this DataTable content into the database where each row will have 1 uniqe Id in the database without using loop.If it is not possible without a loop please show me how to do this with the loop Again I already have the DataTable filled up and it is ready to be inserted into the database?
View 2 RepliesLoop Through Datatable And Run Stored Procedure?
Aug 10, 2011I am trying to loop through a datatable, that will pass information to my stored procedure but it isn't working.even though it works when i manuelly
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim dv As New DataView
[code]......
Loop Through Rows Of A Particular DataTable Column?
Mar 4, 2009Here is my DataTable columns :
ID Note Detail
I want to write sth like this :
//below code block is not the right syntaxFor each q in dtDataTable.Column("Detail)
strDetail = Row of Column Detail
Next
Loop Through Dataset.Datatable Slow Performance In .Net 1.1?
Mar 16, 2009I have a program in where I need to loop though the entire dataset.datatable. I takes a long time. What is the alternative I can use to do the some job but faster?
View 4 RepliesVS 2008 Difference Between DataTable.Select And A For Each-loop?
Dec 30, 2009I just discovered the DataTable.Select-function, and boy I'm glad I found it! It makes my code run several times faster. But, I don't quite understand why it's so much faster than my previous code. In my first code, I looped trough my DataTable to find the specific row, like this:
[Code]...
Transfer All Row Data Stored In Datatable To Arraylist Without Using A Loop?
May 1, 2011Is it possible to transfer all row data stored in datatable to arraylist without using a loop ?
View 12 RepliesLoop Through Datatable And Output Results To A Text File?
Feb 3, 2011I have a data table that has thousands of entries. The table has employee production information: YearMonth, Employee ID, Pages worked and Jobtypes (e,k,o and r). I need to calculate a sum of each jobtype and a sum of pages worked for each jobtype, for each individual employee. I am pulling this data from an Access database and so unfortunately I am unable to use LINQ.[code]...
View 4 RepliesSystem.Data.DataTable - Create A Dataview And Then Loop Through View
Jun 25, 2010im trying to select some rows based on a criteria, i was wondering is it faster if i create a dataview (based on the criteria) and then loop through the view? or should i loop through the entire datatable and check the criteria manually.
View 5 RepliesVS 2010 - DataTable - Change / Remove Some Data Using Loop Does Not Work
Jan 24, 2012I'm pulling data from my DB, adding it to a DataTable and binding that DataTable to my DataGridView. Before I bind the data, I need to change/remove some data. When I loop through the rows and use a Select Case, just for this column, it doesn't work. But if I use an If, it works fine. [Code] In the example above, the "Pass_Flag" row works just fine, but the "FailureCD" does not. But after the Select, with the If statement, it works. In the example, I'm casting the row as a string first and then an integer. I tried casting to an integer in the select case and it doesn't work either.
View 4 RepliesDirectoryservices.directorysearcher Loop Has Error A Column Named 'cn' Already Belongs To This Datatable?
Oct 4, 2010I have a function that searches AD for members of various groups. If I remove the loop, I don't get the error "A column named 'cn' already belongs to this datatable", however, I need to iterate through each OU.
Function getCOMDLNames(ByVal searchStr As String) As DataTable
Dim MySearchRoot As DirectoryEntry = New DirectoryEntry("path", "usr", "pwd")
Dim MyDirectorySearcher As New DirectorySearcher(MySearchRoot)
[code].....
VS 2005 - Print The Entire Datarow At A Time And Then Loop Through All The Rows Present In The Datatable?
Mar 26, 2010I have created a datatable and now i need to print it,so i did the following:
Private Sub PrintDocument1_PrintPage(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage
Dim xPos As Single = 20
[CODE]...
The code works fine.But in the above code as you can see that i am printing the each rows content of the datatable one by one and after printing all the contents of a single row i am looping the code again for printing each and every row present in the datatable. So i want to know that inspite of printing each and every data present in the row of the datatable,is it possible to print the entire datarow at a time and then loop through all the rows present in the datatable?
[2008] Loop Through All The Controls On A "panel" And Bind Them To A Datatable
Jan 25, 2009I want to loop through all the controls on a "panel" and bind them to a datatable. I'm finding it hard to detect the "end of the panel" - as I also have group boxes and such on the panel. At first I was using the "parent" control - but that doesn't work with group boxes.
[Code]...
Evaluates Loop Condition In Do...Loop Statment To Determine Whether Loop Instructions Should Be Processed
Mar 14, 2011Makes the following statement about the code below:
**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.
Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?
See below.
Option Explicit On
Option Strict On
Imports System.Globalization
[CODE]...
VS 2005 Datatable Vs Dataview - Apply A Filter To The Defaultview.rowfilter Property Of That Datatable
Mar 15, 2010I have a datatable and I apply a filter to the defaultview.rowfilter property of that datatable. If I then loop through the rows collection of the datatable, will I only be able to see those rows that the filter applies to, or will it loop through all the rows?
View 6 RepliesVS 2010 : System.ArgumentException Was Unhandled Message=DataTable 'get_item_list' Does Not Match To Any DataTable In Source
Apr 21, 2010I am working on a project that takes an xml schema and xml data files and places them into a DataTable, the 2 files are generated from a working table that i have written to disk. I wish to load these 2 files into a DataTable. Here is What i have
vb.net
Friend Function CreateTable(ByVal tableName As String) As Boolean
Dim table As New DataTable(tableName)
table.ReadXmlSchema(tableName & ".xsd")
[code]....
this however produces the following error on line 3
Quote:
System.ArgumentException was unhandled Message=DataTable 'get_item_list' does not match to any DataTable in source.
get_item_list is the parameter passed into this function (tableName)
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
Get Subset DataTable From Main DataTable, But Preserve Primary Key & RowErrors?
Apr 16, 2012I came across a problem with using a BindingSource as my DataGridViews.DataSource. Whenever I applied a filter to a column in the BindingSource and the user makes changes that don't match the column filter the DataGridViewRows would automatically disappear. A similar thing would happen when applying a Sort to a column. If the user made any changes the DridGirdViewRows would automatically sort causing rows to be moved around. This was not ideal for my application and there isn't anyway to stop this from happening with the BindingSource.
To correct this issue I have to use subsets of data. I use a DataView to apply the filter and sort to the main DataTable, which creates the subset DataTable.The problem is when I use the DataView.ToTable method I loose the Primary Key and RowError information. So I have to reapply this information everytime the user filters or sorts the DataGridView.Is there a better way to get a subset DataTable?[code]...
VS 2010 Datatable - Summarize Multiple Occurrences Of An Item In A Datatable
Jun 5, 2012I have a datatable that has a resource in one field and hours used in another, it looks like this -
Resource Hours Used
Manager 1
Accountant 1
Field Staff 2
Accountant 3
Manager 4
Manager 1
Administrator 6
Field Staff 4
Manager 0.5
Administrator 1
What I want to do is be able to create a summary of the data table above that groups multiple occurrences of a resource and adds up the hours used for that resource, creating a summary that looks like this -
Resource Hours Used
Manager 6.5
Accountant 4
Field Staff 6
Administrator 7
Assign A Populated Datatable's Columns To Another Empty Datatable?
May 28, 2007Is 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 RepliesCreating DataTable And Copy Existing DataTable Schema?
Feb 17, 2011I'm using vb.net 2010.I have a DataSet with a Table and data. MyDataSet1 which contains Table1 I want to create another table that is the same as the Table1 but without data, but it should have the columns, etc.
View 1 RepliesGetting Array Of Selected Datarows From A Datatable.select Into A Datatable?
Apr 8, 2009I 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
Loading The Contents Of DataTable Adapter Query Into A Datatable?
Nov 18, 2009load the contents of a query from a dataTable Adapter into a datatable?
View 2 Replies