[2005] Deleting A Row While Looping Through DataTable?
Jan 21, 2009I have a datatable and I want to delete individual rows on the basis of a certain condition. How to do it in minimum lines of code possible?
View 2 Replies
ADVERTISEMENT
Asp.net - Looping Through Records From One DataTable And Populating Another DataTable In .net
Aug 10, 2011I have an asp.net application where I have a datatable ("DataTableA") that returns just one column ("ProductID").
I want to read each row of "ProductID", process some business logic, then copy both those columns (ProductID & ProductIDBusinessLogicValue) to DataTableB. This DataTableB is then displayed on the asp.net page.
What would bhe the best way to read each row of DataTableA ?
No Data When Looping Through Rows In An Datatable
Oct 18, 2011When my application loops through the first code block below, I get valid data for all datarow fields. [code]...
But I get an error when looping through that code block "Collection was modified; enumeration operation might not execute." [code]...
However, in the second code block, I get a valid record for MgrID, but I get a blank value for the other fields.
When I look in the database, all fields in that table have valid values.
VS 02/03 Looping Datarows From Datatable Select
Jun 15, 2010I am trying to use the Select on a datatable and am having some trouble. I got it to find a match on rows in a datatable I fill with data in multiple columns. But I cannot seem to loop through the results to do something with it. Here is my code below. The table is already filled with data.
[Code]...
Merge An Array [String()] With A DataTable Without Looping?
Apr 19, 2012Is there a way of merging (importing or whatver is the correct terminology is) the data from an Array in to a DataTable woithout looping. I already know how to loop through the array to populate the DataTable with new DataRow but I'm looking for something much faster if it exists. I've got a 1 dimensional String array i.e. 'String()' that I need to populate a DataTable with new DataRows.
View 4 RepliesC# - DataTable Deleting Old DataRows Before Inserting New Safe?
Apr 20, 2011i have a many-to-many relationship table in a typed DataSet.For convenience on an update i'm deleting old relations before i'm adding the new(maybe the same as before).Now i wonder if this way is failsafe or if i should ensure only to delete which are really deleted(for example with LINQ) and only add that one which are really new.
In SQL-Server is a unique constraint defined for the relation table, the two foreign keys are a composite primary key. Is the order the DataAdapter updates the DataRows which RowState are <> Unchanged predictable or not?In other words: is it possible that DataAdapter.Update(DataTable) will result in an exception when the key already exists?
[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 2005 Loop Doesn't Keep Looping?
Feb 22, 2010I'm making a rock paper scissors program and once I set the current_scene variable to 1, the MainLoop() sub doesn't keep looping, but the sub doesn't exit either. (Form1.vb is the most important file.)
View 9 RepliesVS 2005 - Looping Through DataGridView Cells Of Columns?
Jun 29, 2010With .net 05 and datagridview
Error: Index was out of range. Must be non-negative and less than the size of the collection.Parameter name: index
I am just looping through a datagridview cells of some columns, my datagridview is having 134 rows and 09 columns, but my code stopping at row 124 stating above error.
My code is here:
Public Sub IScoLP(ByVal dGRid As DataGridView)
'SHUNTING
Dim w As String = "SHUNTING"
Dim T_wTYPE As Object
Dim T_ALp As Object
[Code] .....
VS 2005 - Looping Through TextBox Validate Handler?
Jul 30, 2009Private Sub TextBoxHandlers()
For Each c As Control In Me.Controls
If TypeOf c Is TextBox Then
AddHandler c.DataBindings(0).Parse, AddressOf Textbox_Validate
End If
[Code] .....
I think I'm close but how do you get what the text box is bound to? I'm trying to loop through all my textboxes and add a handler that on validation will insert a null if it equals string.empty. How to set the property manager by sending it the appropriate Binding context. I know that this code will not find textboxes in panels or ones that are on other controls, that's fine, for now. I'm also not sure how it will handle controls that are bound to different datasets.
VS 2005 Deleting Some Csv Files
Jun 4, 2009I'm experiencing a wierd problem deleting some .csv files. Any .csv files named 1.csv, 2.csv, or 3.csv will not delete using delete() method of system.io namespace. if i do any number greater than 3 it works. For example, 4.csv, 5.csv, etc. works fine. 1.xls, 2.xls also is ok. The error it is throwing in my log is 'access to the file is denied.' Nothing is using the file. I even copied a new file into the directory and it does not work. I even created a 1.csv in a totally different directory with no luck. What is going on with this? Has anyone ever experienced this?
View 9 RepliesVS 2005 - Looping Through Word Doc And Find String To Replace
Jul 19, 2011I am looping through a word doc where I need to find a string to replace and these are in text box's so I thought I could do something simple like this but its not working.
vb
For Each oRng In doc.StoryRanges
Do
strTxt = oRng.Text
If strTxt = "textToReplace" Then
[Code] .....
VS 2005 Set Label Text While Looping Through Date Range
Oct 2, 2010in a form I need to set the text of labels while looping through a range of dates set by a start date and an end date. Right now I have come up with this code,
[Code]...
Deleting Record In Access Db Using 2005
Mar 15, 2012I have this problem : Dynamic SQL generation for the DeleteCommand is not supported against a SelectCommand that does not return any key column information.... the button used to delete record in my project is button6 at the end of the code
My code :
Public Class Form1
Dim con As New OleDb.OleDbConnection
[CODE]....................
Deleting Row In Table From Sql Server 2005?
Jun 7, 2012I try to delete the row of the table from sql server 2005 via vb.net 2005 using textbox to refer the serial no value of the column which is set as primary key, when i click the button to delete it give me this error.
Quote: Conversion from string "error" to type 'Integer' is not valid.Here is the code Private Sub deletebtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles deletebtn.Click
[Code]...
IDE :: Completely Deleting Project From VS 2005?
Jul 29, 2011I would like to know how to delete a project from Visual Studio 2005 without leaving any elements behind to cause trouble or make Visual Studio think that it is still there.
View 3 RepliesVS 2005 Deleting A Row From An Access Databse
Jul 16, 2009when i had 3 text box then i did the following code and it worked for me also:[code]in the above code ,depending on the textbox3.text,i performed all the deletion,so it was easy now i have got a three of combo box and three text box.i filled the combo box with the database entries.now i want to perform deletion depending upon the selected items of any one of the three combo box.i cant get the logic of the where portion in the delete syntax.
View 19 RepliesVS 2005 Deleting Files From A Folder?
Apr 1, 2009I have created a project where I can attach files and I am displaying the name of the file, example:
Mytestfile.doc
mytestfile.txt
Mytestfile.pdf
I have the names being displayed on a listbox, so far everything is working just the way I expected to work.When a file is selected from my opendialogbox, the file gets saved into a folder under my local disk, so far so good.The problem that I am having is deleting the file from the folder.I have added a delete button and I would like to when I click or highlight one of the file names to go into where the file was saved previously and deleted This is the code that I have for the delete funtion:
[CODE Dim sFileName As String = "C:program filesSupport DeskAttachments" & ListBox1.Text
System.IO.File.Delete(sFileName)][/code]
The problem is that if I add the code to the clcik event under the listbox, it works great, but if I add the code to the click event under my delete button, it doesn't work, what I found is that under the path, if I am under the click event from the listbox when it gets to the lisxtbox.text it displays the file name, which is what I whant, but when i tried the code under the click event under my delete button the listbox.text is blank.
VS 2005 Reading Lines Of A File, Adding Them To Listbox, And Then Looping?
May 17, 2009I have a form with a listbox. I'm adding items to the listbox through a file that I saved. When I open the file, I want each line/string in the file to go in as a separate item in the listbox. I've gotten it to work so far but only with 1 string. I need to loop the part where the file is being read to be able to add all the strings that are within the file to the listbox. How do I do this? So far, this is the code I have:
VB .net
Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click OpenFileDialog1.Filter =
[code].....
Deleting Rows From Multiple Tables In SQL 2005
Jan 5, 2010"Deleting rows from multiple tables in SQL 2005". I need to delete all the rows in the multiple rows where it's the same UserId. My Delete command below:
Delete From tableA
From tableA INNER JOIN
tableB ON tableA.UserId = tableB.UserId INNER JOIN
tableC ON tableA.UserId = tableC.UserId INNER JOIN
tableD ON tableA.UserId = tableD.UserId
Where (tableA.UserId = @UserId) AND (tableB.UserId = @UserId) AND (tableC.UserId = @UserId) AND (tableD.UserId = @UserId)
What is happening from the above query is only the rows from tableA is getting deleted.
VS 2005 Stream Writer And Deleting A Line?
Apr 21, 2009What is the code to make a stream writer remove a certain line from a file stream?
View 1 Replies[2005] Deleting A File Using Windows Vista
Jan 6, 2009right now, im using Windows Vista.. in Windows XP, deleting a file is working with this code System.IO.File.Delete("C: estdelete.jpg") But in Windows Vista, i encounter this message: Access to the path 'C: estdelete.jpg' is denied. why its happening? what is the solution for this?
View 14 Replies[2005] Deleting In Use MSI (Windowsinstaller.installer) File?
May 7, 2008I have created a script that opens up an .msi with a transform file. To make changes to the transform file, I have created a temporary .msi file. Once the changes have been made to the file, I want to delete the temporary .msi, but I am unable to as I get an error that the file is in use by another process. That process is the VB .exe itself. I need to be able to release the handle on this file so that I am able to delete it.
I have tried this by using both the 'ReleasecomObject' using try/catch and through using 'FinalReleaseComObject'. I do not get errors when running this in the script, but it still won't allow me to delete the file.
VS 2005 Deleting Record From Parent / Child Bindingsource
Sep 14, 2011I have a form with a parent bindingsource showing details and a child bindingsource showing the multiple line items in a dgv. This relationship has the properties set to enforce the constraints and cascade the updates and deletes. When I add a new parent record there is a function for inserting default line items into the child. I have this code fr deleting a record,
[Code]...
edit: jmc posted a nice solution to this problem in the code bank just recently but I could not get it to work in 2005, this line, "AddHandler Me.LOTBindingSource.Adapter.RowUpdated, AddressOf parentAdapter_RowUpdated" throws an error. It say "Adapter is not a member of the System.windows.forms.bindingsource.
VS 2005 Sorting A Datatable Out?
Jan 25, 2010I have a problem which I am struggling to efficiently put into code. I have a datatable
ID | NAME | DATE | JOB
0 | Joe | 01/01 | Selling
1 | Bob | 03/01 | Buying
[code].....
VS 2005 Datatable And Sorted Grid?
Sep 10, 2010I have a datagrid which has been bound to a datatable.If I sort the grig lets say by surname order I would like to export that datatable in that sorted order but whenever I do it never seems to be sorted.sorted order.
Basically what I see in the grid is how I want my exported table to be.
VS 2005 Datatable Differences Between Databases
Dec 2, 2010I probably shouldn't go down these roads, but stuff like this just gets to bugging me. Of course, with any of three possible database backends I should expect some quirks.I have a table that has one primary key field and several NOT NULL fields.So I do a SELECT * from the table and populate a .net datatable with the results.I can create a new row for the table, add the value for the primary key field, and then add the new row to the datatable. Everything works fine in Access.But in Oracle the situation is different.I have to supply values for all the NOT NULL fields before I can add the row to the datatable. As far as I can tell the two tables are the same in the two databases in both databases there is one PK field and the same fields are defined as NOT NULL. So why does the .net data provider for Oracle care when I try to add a row that does not have values in a NOT NULL field and the Access provider not?
View 5 RepliesVS 2005 DataTable.Rows.Add Error
Nov 24, 2009I am facing below problem. Cannot perform '=' operation on System.Int32 and System.String.
What I tried to do here is I have a dataset get from SQL Express 2005 and I am adding a new row to it and it hit the above error.I combine 3 tables in SQL and return the data to my win application.And I add 1 row to it. here is the data type in my sql statement.
SELECT cd.indexNo, c.custid, c.companyname, c.contactperson, c.contactno,
dt.Type, cdm.DrawingMaterial, cd.Size, cd.Roundness
FROM rpts_customer As c, rpts_custdiesdetail As cd,
rpts_Type As dt, rpts_CustDrawMaterial As cdm
WHERE c.custID = cd.custID AND
cd.cdmNo = cdm.cdmNo AND
[Code]...
VS 2005 Navigating The DataTable With The Help Of A BindingSource?
Dec 26, 2009how can i navigate the datatable with the help of a BindingSource?
here lies the
con = New OleDbConnection("Provider=Microsoft.Jet.Oledb.4.0;Data Source=db1.mdb")
con.Open()
cmd = New OleDbCommand("Select * from Table1", con)
[Code].....
[2005] Filtering A Datatable Using .Select?
Nov 5, 2008i have a datatable that contains numerous postcodes in the following format[code].....
there is always a space before the last 3 characters now i need to filter the datatable against a list of excluded postcode areas..these are the following format:-
BT1
BT2
BT4
BT40
so its either 2 letters & 1 number or 2 letters & 2 numbers, no 2nd part to the post code..i have a little function which builds the string, and then removes the rows from the dataset like so (ive pasted in an example postcode string)....[code]....
which obviously brings out no records as they all have full postcodes the issue is, i need to be comparing only the first half of postcode BTxx bit but cannot use a % wildcard, as this then would bring out BT40's when i only want, in this example, BT2 & BT4's..so is there a way to make it compare against the first half of the postcode?
