VS 2008 Resetting A DataGridView?
Jan 28, 2010
I've created an application that runs queries against a SQL server (via Data Adaptors) in VB.NET 08 and returns the results to a DataGridView. It works great and returns my data, but when I switch to a different query that returns different columns, the DataGridView keeps the old columns from the previous query and adds the new columns from the new query to the end (far right) of the DataGridView. Is there a way to counter this? I don't want those previous unused columns showing up in my results.
I tried setting the DataGridView DataSource and DataMember to Nothing and that didn't fix it.
Here is my code...in case that helps
Connection.ConnectionString = "Provider=SQLOLEDB;Data Source=;Initial Catalog=;Integrated Security=SSPI;"
Connection.Open()
[Code]....
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Jan 27, 2010
I've created an application that runs queries against a SQL server (via Data Adaptors) in VB.NET 08 and returns the results to a DataGridView. It works great and returns my data, but when I switch to a different query that returns different columns, the DataGridView keeps the old columns from the previous query and adds the new columns from the new query to the end (far right) of the DataGridView. Is there a way to counter this? I don't want those previous unused columns showing up in my results. I tried setting the DataGridView DataSource and DataMember to Nothing and that didn't fix it.
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May 31, 2012
I am creating grid on form load event. Initially I am setting some values in datagridview combobox as :
Dim dgvc As DataGridViewComboBoxCell
datagrigview1.Rows(0).Cells("Column1").Value = txtColumn1.Text \setting selected item
datagrigview1.Rows(0).Cells("Column1").Value = txtColumn2.Text
[Code]....
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May 7, 2009
I'm trying to do a simple loop while reading a file. I have tried to make the streamreader as a public value, so this way it would be passed between the subs, or rather changed by each sub working with it. The problems comes into play, when I double click the read button, since the value of sr is assigned to -1 after the first full read, so the program doesn't read the data from begging but assumes the end of the file and stops. Is there any way to reassign or reset the value of sr so that the file will be read again from the beginning? This is the example code I got.
Public Class formcollegetut
Public sr As IO.StreamReader = IO.File.OpenText("colleges.txt")
Private Sub btnDisplay_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplay.Click
Dim test As String = ""
Do While sr.Peek <> -1
ReadData(test)
[Code] .....
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Oct 23, 2009
On my yahoo emailer program , i have a scrolling text message (label4) saying "your message has been sent" when i click send. But the text remains on the screen after i clcik the "Refresh" button.This is what im using to clear all the other textboxes :
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
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Aug 4, 2009
After the client finishes testing, they go to the results page and then my program returns them back to the secondary page.If they re-enter the testing page again, for a second go-around, with out completely leaving the program as I have been doing since I was tweaking the code after each run, the repetition counter is not resting back to Zero. It�s still retains the information from the previous testing phase.
Example:The client chooses how many testing cycles they want to go through, from 1 to the total amount available to them to test. Right now its only 5.When they first start testing, it starts at �1 of 5�, then progresses at one increment for each drug they test on. Once they reach 5 and answer their final question, the program then goes to the results page and then to back the secondary page. If they choose to re-enter the testing page without totally leaving the program, the testing page counter sits at �5 of 5�. Shouldn�t the page be resetting the variables each time it loads?
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Jun 3, 2012
I'm having trouble resetting the date_time variable on my unix timestamp converter.
Dim date_time As New DateTime(1970, 1, 1)
MsgBox(date_time)
date_time = date_time.AddSeconds(10000)
[Code].....
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Nov 25, 2011
I've got the following set up:On a webapp, I've got an updatepanel Inside this update panel, I've got two regular panels and a set of two radio buttons, radio1 and radio2.On Panel1, I've got 4 drop down lists (lets call it DDL group1), being loaded by the CascadingDropDown Extender, meaning the first box triggers the second, and so on. All 4 DDLs have autopostback enabled, meaning that every time I select a value, a SelectedIndexChanged method is called which loads data from a database, based on the information selected on the last DDL.
On Panel2, I've got the same set up, except that I've only got 2 DDLs (let's call it DLL group 2), also linked as cascading dropdowns. These also have SelectedIndexChanged methods.
[Code]...
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Jun 9, 2012
I have a DataGridView in which their is one column defined as a CheckBox. This checkbox is used to delete the record if the user chooses to do so. When they check the box, the user is prompted with a confirmation deletion message. My issue is that if the user chooses not to delete the record, I want to "Uncheck" the box and I can't get this to work. I've tried using the below code and it still won't work.
dgvBuild.Rows(e.RowIndex).Cells(6).Value = False
dgvBuild.Rows(e.RowIndex).Cells(6).Value = CheckState.Unchecked
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Dec 10, 2011
Like so many of your subscribers I am a (very) basic beginer.[code]Taken from Visual Basic.Net, for complete beginers. (page 67)
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Jun 10, 2010
Looking to make a simple VB form, that has three text boxs on it. One for a users username, and two for passwords. What I want to do is provide teachers with this form, they type in a students username, and if that username is found in AD it enables the two password boxs. Then the teacher can type a new password for that user in the boxes (the second one obviously being a validation) and then when they click save, it updates the AD account with the new password. Any ideas on how to do this? Does anyone have any code?
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Aug 17, 2010
If I have a double variable that goes through a loop and gets numbers added to it, is it just as simple as saying variablename = 0 to reset it?
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Sep 9, 2009
Usually, when I reset the IIS of a remote server, I have to use "Remote Desktop Connection", log in, and go to DOS , and type "iisreset". Now I'm wondering is it possible to do the exact same thing without using "Remote Desktop Connection" application? Could this be done programmitically and remotely (because the program will not be running on the actual server)? Of course, I'll be providing the username and password within the program.
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Dec 12, 2009
I have a form with lots of labels on it, and a reset button to reset them to a default text. This reset sub has lots of lines of code to get this done, but I think it cen be done in just a few. I thought of something like:
For Each Label In Me.Controls
Text = "0"
Next
but this doesn't work, or anything else that I've tried. how to do get this done? And what if I want half of the labels set to 0 and the other half to 1? Would that be possible without setting them all seperately?
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Dec 15, 2011
I have been coding a Reset Login Details form, the user needs to enter the new Username, the new Password and the Current Password.Here is my code below - something in the form is not working as i am getting an error when i fill in the form about the INSERT INTO statement.
Imports System.Data.OleDb
Public Class frmChangeLoginDetails
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
[code].....
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Mar 10, 2011
I'm storing data using my.settings (e.g., to use as a incremental counter). When I run my application it increments the value but, I do not know where to reset this value despite looking at all of the project files for them.
Is there a file that contains this data?
Note: at times during testing I don't want to reset the value(s) back to zero.
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Aug 31, 2011
I'm using the font dialog and have noticed that when I select/highlight portions of text and then cancel out of the dialog, the selected text is changed to the default settings (i.e., font type, style, size, color, etc).
Is there a way to preserve the original text settings?
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Feb 9, 2011
I have a web site which uses cookies using ASP.NET, however everytime I publish a new site and upload all or some of the new .dlls it invalidates all the existing cookies. The cookies are used to track simple logins, but I want to maintain the cookies that were created before a publish so they are still usable afterwards - this seems to affect webkit based browsers and in my testing I can replicate this issue after each partial or full publish.
[Code]...
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Oct 12, 2009
I have created a procedure as below for ressting colors of any control I decide
Private Sub ResetColors(ByVal Control As Control)
Control.BackColor = SystemColors.Control
End Sub
But the compiler cant accept (Tooltip1) I think because it is not a control Call ResetColors(ToolTip1)<---- Error
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Mar 26, 2009
Long story short I have a situation where some users have access to two domains that do not trust each other. They log into one domain and their user ID's are identical on the other domain. So when they change their password on the first domain they need to call into tech support to have it reset on the second domain. I'm writing a app that checks if they have access to the first domain but not the second and if this is found to be true it prompts them for the new password to update the second domain.
Here is where I am stuck. The following code works GREAT but I need it to be more flexible:
Code:
Friend Function ResetPassword(ByVal OldPassword As String, ByVal NewPassword As String, ByVal UserName As String) As String
' Resets a users domain password
[Code]....
The issue is the CN is different between domains (one is first name last, other is last name first) so I need to search by UserID which is the same between the two. So I tried searching by sAMAccountName but it says object not found. Also I need to be able to search the entire Super Corp OU. When I get rid of the extra OU's the search also fails
So I need to search LDAP for sAMAccountName anywhere in OU=Super Corp. How can I do this? Every combination I try seems to fail yet if I hard code it like the above example it works great. The idea is to replace CN=John Q. Public with sAMAccountName=" & username & " to pull jsut that user on the fly.
If it matters all clients are XP SP2 or higher, both domains are Server 2003 or higher. VB 2008 SP1. The error message when a different search is done is a "Object not found".
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Jun 21, 2011
after the backround image property of a form was set by the main code how can the user reset the form's backround image to none (the plain grey color)?
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Aug 18, 2009
My deployment of upgrades to an application written in C# (.NET 3.0) consist of simply replacing an older .exe with the new one. Because that older version can currently be used by some customers, I simply rename the old version to blahblah.exe.old and copy the new one to the same folder. When the user opens up the application again, the new one loads up.
The problem is, every time I deploy a new version, the user scope settings are always reverted back to the default values.
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Apr 12, 2009
I use VS 2008 Standard. If I do a QuickOnce deployment after resetting Application Files in the Publish Tab I get a bunch of messages saying that various files are not in the GAC. To solve this I change the Publish Status from Prerequisite (Auto) to Include and set Download Group to Required. Then when I install the application I get the splash screen and then the message that the application has stopped working. There was a workaround posted to delete /bin/obj/.cache etc, but I have no /bin/obj/ folder.
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May 3, 2011
ive added a special color for some items into a listview, that was the only reason i picked up a listview over a listbox btw, anyways when i sort the items into that listview the items backcolor simply does not exist anymore, is there anyway i can still sort the items out and avoid this problem?
The only way i know right now is to add loops and numbers as reference and then setting those numbers as colors reference, then erasing them and add the backcolor, this is not viable to performance at all
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Jan 27, 2010
when your resetting a form is it possible to deselect or not keep high lighted the item that was previously selected from the last entry. I know how to clear the text boxes but the items in the list boxes stay highlighted. Is it possible to get back to the initial setting of having nothing selected as when you first start debugging?
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May 26, 2011
I have created this code to reset my picture boxes to default locations upon form load.
my sub:
Code:
Sub reset_Alien_locations()
Dim Xlocation As Integer = 26
For segmentIndex As Integer = 0 To AlienArray.Length - 114
[Code]...
I have this sub load up upon form_load event. Yet it doesn't do a thing! I want each picture box to appear on the same row, hence the y axis is set to 49. but I want my X-axis to be added by 30, so that there is a gap of 30 pixels between each picture box, hence the x point is: Xlocation = Xlocation + 30
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Nov 6, 2010
I have a DataGridView where Cell_Validating is being done. I have a Cancel button on my form that allows the user to exit out of the DataGridView changes. The problem is that if a cell was currently flagged as in error, I cannot exit and remove columns from the DataGridView. I get the following error: Operation did not succeed because the program cannot commit or quit a cell value change. Is there a way to cancel the validation once the focus has been removed from the DataGridView? Here is my Cell_Validating
[Code]...
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Oct 4, 2010
I am making a simple program.. i have a Form named frmmain that contained datagridview control named DataGridView1.. and another form named frminsert that contains two textbox controls named txtFname and txtLname and Button control named btinsert.. I want to pass the value from txtFname to the Datagridview column1 and the value of txtLname to the Datagridview column2 when I click the btinsert.
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Jun 9, 2011
How does one go about adding text to a rich textbox programatically (at the selectionstart point) without resetting the text already written by the user?
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Jun 23, 2011
I'm reading a text file with StreamReader, line by line. If a condition is met, then I do an operation and then start reading the file again from the first line. I realize I could close and then re-open the file, but surely this would be very slow.
I could do this easily in VB6, but pulling my hair out trying to do this in vB.net. It seems that 'Seek' is the function to use, but it doesn't work.
I've seen other examples, where it works, but you must open it a different way -- with a file number.
Imports System.IO
Dim I as Integer
Dim LineText as String
[Code].....
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