I am trying to add the update button on my form. The application run's fine but when I change the GPRDSTATUS - to another value and click Update buton the following exception is given "NullReference Exception was unhandled". Highlighting this line of code :
objDataAdapter.Fill(objDataSet, "DistinctGP27").
This is the piece of code I used to want to Update the the table DistinctGP27
Private Sub BtnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnUpdate.Click
Dim objConnection As New SqlConnection _
I am trying to update my form once the delete button is clicked. There are several fields like Name, Date, Date of Birth and so on. Once I delete a record I want the form to automatically load with new / updated data. This form fetches data from MS Access using OLEDB I have spent a long long time trying this but did not get any solution.
I tried to update the button text on a form from a backgroundworker.do_work event, and it failed, with the usual cross-thread exception message.However, by pure chance, I also tried to update text in a system.windows.form.toolstripstatuslabel also from this backgroundworker.do_work event, and it DOES work. Question: why is this? Is it perhaps because theres some kind of implicit shared behaviour with system.windows.form.toolstripstatuslabel?
I have a webbrowser and on a form I need it to fill text. The problem is, in order for the submit button to activate, you have to atleast type in 1 letter for it to update and make it send. The problem is when I do document.getElementById("p1").innerHTML= "SSSS" it works but it wont update the submit button to allow me to submit the form. What should I do?
I have a db with three tables. On the form i drop the first table, then the second (related), then the third (related to the second). I use 1 dataset and three datagridviews. The problem is that i can't update the three tables when i use the update button. I use VB 2008.
i have problem with an update button for my application.The code for the addnewrow and updateinformation button is as follow
Private Sub btnUpdate_Click(sender As System.Object, e As System.EventArgs) Handles btnUpdate.Click btnUpdate.Enabled = False btnDelete.Enabled = True[code]......
I have a DGV I am working on, and I have many columns.dgv bind to two table my problem with update button dose not update and gives me wrong massege ""Dynamic SQL generation is not supported against multiple base tables"
Imports System.Data Imports System.Data.OleDb Public Class Form4
I'm trying to make a button that displays an image, that's easy, but the image is an editable icon so I want the image on the button to be updated every time the form is started how can this be done?
I am making a small game of pong and i want to incorporate a pause feature. is there a way i could freeze the form in place and then unfreeze it later at the push of a button. the tutorial i used is below so check it out to get an idea of what i've made so far.
I was using 2 forms, the first one has general data capture and the second one is a calendar form. On Form1 I have mulitple windows controls. A Textb ox and beside a Calendar button. When I click on a Calendar Command button, it should open calendar form and once the user selects the date, the date should be placed in the text box on the form1. Identical to this on Form1 I need multiple textboxes that needs date to be captured.I cannot use a global variable for this as I need to validate mulitple text boxes. To explain this, I have a Transaction Date and Date Received. I need to validate whether Transaction date is prior Date Received or not? I dont want to use several global variables b'coz I might need multiple validations as above. Please help me on this.
I have a date selector on mdi parent that updates a property when date is changed. When I open a child form, it grabs the property just fine. However if I change the date again after the child is open the date does not change on the child unless I close and reopen the form as expected. What would be the best way to automatically update all open child forms when the date is changed on the parent at anytime? running a timer to parse the date property is impractical.
I just want a program compiled in Visual Basic 2008. which can just submit a form of only one field. the form is already uploaded to the server but i don't want to go to that url every time to do so.What I want here, just to open application and fill that field and submit. Is this possible in visual basic 2008?Also let me know how to create a button that can rapidly submit the form repeatly untill the second button named cancel is pressed. field name of that form is "msisdn" and the action on submit button is post method and url in target is url...
sub Page_Load //Get data form databse and show it end sub sud deletsome(Source As Object, e As EventArgs) //delete one record when user click on submit button end sub
When I click the button, the page reload, all the data have no change, I must re-enter the page again, the record I have delete disappear. Can you show me why? The full code here:
I'm a beginner to Visual Basic, and I made a simple program, however I want to put a 'check update' button in it... It consists of downloading a txt file that contains three numbers, if it match with the version of the program it says 'you already have the most up-to-date version' or else it asks you to download the update and then bring you to the dev blog of the program I made, however, when I download that file, it brings me a blank txt file instead of the one I uploaded into the site. By the way, I'm downloading it through HTTP.
How to refresh a datagridview data by pressing the button? That is after the data has been deleted from the database, the datagridview will show no data there if I have one row of data only. Currently I tried something like datagridview1.update() but doesn't work.
I got the database to update, but it only does it for the first row selected not for the others.
Protected Sub btnUpdate_Click(ByVal sender As Object, ByVal e As EventArgs) For Each row As GridViewRow In GridView6.Rows ' Selects the text from the TextBox Dim selectedcheck As CheckBox = CType(row.FindControl("chkselect"), CheckBox) If selectedcheck.Checked = True Then
I have already done the creation of button and the dragging of button at runtime already.But now i need to know how do i save the last dragged button on the form and also detect the name of the last clicked button.so lets say i now drag a button to coordinates 25,254. so when i exit the form and the next time i launch it, the button will still be at 25,254. and this one will go on for the number of button i created like 100. so when i launch the form the 100 button will be at the exact position where i last saved them.the second part is lets say i created button1 and button2 on the form in runtime. so when i clicked the first button, it should display button1. and if i clicked on button 2, it should say button2. same goes for like 100buttons.
I have created a button in a UserControl. I have added that button to a WindowsForm in another app and added a buttonclick event to the code. When running (debugging) the app and clicking on the button; nothing happens. It doesn't act like a button at all.
The code for the button click event in my test app is as follows:
Private Sub Element1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Element1.Click MsgBox("The button has been clicked") End Sub
Well on my application there is a check for update button and it needs administrative privileges in order for it to download the update (it needs to make a version change in the registry) and I don't have permission to. How can I make it so it asks for permission?
