What Event To Use When Loading Initial Data
May 23, 2011
I'm writing a forms application. I'm adding a piece that allows you to double click on a row of a datagridview control to open a new form with more details. These additional details are pulled from a database, which takes a bit of time to finish.If I run the DB query from the form's load event, the form doesn't show up until everything in the load event has completed, which can take several seconds.I want the form to show up instantly when you double click, and all of the fields to be populated once the data is ready.Is there an event I should be using other than Load?
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Jan 7, 2009
As it stands, when I click a button to load the data the application lags and looks as though it has locked up although it has not. There are a lot (10,000) of records to load in some cases.
I thought I could just change my status strip text to dispay "Loading database" while it's loading.
So, I raise an event (dbloading) in the "load db" button.click event before calling the procedure to load the data. When that event is raised, I change the status strip text.... but it does not work.
Here's my
Private Sub btnLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoad.Click
jnATM = Me.atmJobNum
[Code]....
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Aug 28, 2009
I'm creating a Windows Console application written in VB.NET and I have a few processes that need to be called only once during the lifetime of the application. If it was an ASP.NET application, I put these in the Appliction_Start method of the Global.asax.vb file. Since there isn't a Global. asax. vb for Console applications, is there an event I could handle that allows me to call my functions before Main is called?
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Jun 2, 2011
an application i developed using vb 2008 express, to fill a web form with data from an access database, one after another when a button is clicked hasn't given me what i expected. the loop was suposed to stop after filling web form with the first data on clicking a button and continue to fill the webform with the next(2nd) data from the database on clicking the button again. Below is the code i wrote
Private
Sub STARTButton_Click(ByVal
sender As System.Object,
ByVal e
[Code]....
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Apr 3, 2009
I am looking for code examples that allow me to write a user's view settings (field sorted by, label selections, etc.) from the detail view of a file open (GetOpenFileName) API
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Jul 13, 2009
I have a window application develpoed in vs 2008, framework 3.5, in which i have put a button.. Now where i click that button the other text boxes are filled up with the data from database thru web service.. what i want is while all text boxes are being filled i want to show an animated loading gif image till data loading is completed in all the text boxes.. i have tried to use image picture box but while data is loading gif image is displyes but in static mode.. cant see animation... i think this is because data loading and animation both are done thru one UI thread..
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Oct 18, 2010
what's the best way to stop a form from displaying in its Load event.I initialise a form using the following code:
Dim MyForm as new MyCustomForm
In the Load event of MyCustomForm, I ask the user to select a folder and use that to populate a listbox on the form.folder.If the user presses Cancel instead of selecting a folder, I don't want to display the form. Right now, I just call Me.Close in the Load event, but that still causes the form to briefly appear and disappear in the background. Also do I need to call Me.Dispose?
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Mar 18, 2011
Why do Me.Hide() And me.visible do nothing under form loading event? Now the obvious answer to me was because how could you call a form to hide if it has not loaded. Make's sense to me. So i checked the documentation to see what options i had. If the form isn't loaded when the Hide method is invoked, the Hide method loads the form but doesn't display it. Interesting. So from what i gather here me.hide should still hide the form. Or have i misinterpreted the documentation? Because the form does still display. Neither also work under Public Sub New().
The only solution i found was under sub new was to change the forms opacity to nothing. Which works fine. But after reading the documentation on Opacity i am still left with another question regarding "Visible vs Hide Vs Opacity" Calling me.hide makes the forms visible property false, Calling opacity set to Nothing makes the form in visible. Both these methods do the required task but does one take up more memory or should be favored over the other? Just because some thing work's i have learned it is not always necessarily the best way to do something.
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Mar 3, 2012
I have a form contains NumericUpDown1, TextBox1, TextBox2, at design time i set NumericUpDown1.Value to 4 and TextBox2.Text to 100, and i have this sub[code]...
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Jun 23, 2009
I'm trying to force an always maximize setting
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Oct 9, 2009
I'm trying to show message "Loading..." when a user select an item in the dorp down list.
Mark up:
<asp:Label ID="lbl_LoadingMessage" runat="server" ></asp:Label>
<asp:DropDownList ID="ddl_Chapter" runat="server" AutoPostBack="True">
</asp:DropDownList>
[Code]....
The method I'm using above is not working. When I select a new item from the drop down list, it works as expected except the message "Loading..." is not showing at all.
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May 11, 2012
I tried to make a menu for my game, but when I placed the code into the form loading event, it wouldn't show. Then I placed a button and moved the code into the button click event and it worked. Thus, I know the code shouldn't be wrong. How can you make the graphics( as in lines, rectangle,etc) show up when it starts up?
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Nov 8, 2010
Display ajax loading image before loading anycontrol .... means if i wanna show textbox on button click after showing loading images using ajax toolkit or ajax extension in vb.net ?
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Oct 25, 2009
i want to know that when im adding my data in form after loading one person data then 2nd person data the 2nd person data cannot come to next line it is adding on the same line.plz tell me wat can i do?
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Jul 5, 2012
I am trying to load a xml file into a data set by loading the information into a data row. when i try to complete the task it throws a nullReferenceException. the row has data in it and i used the code earlier and it work.
[URL]
Imports System.IO
Imports System.Xml
Public Class frmMain
[Code].....
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Feb 9, 2011
I have a Visual Basic Program that, when I enter data into a textbox, uses LEAVE events to update it. However, it will not update until I go to another textbox or press a button or other similar control.This also happens when using the LOST FOCUS event.How can I make the textbox update (be it doing a financial recalculation or some other custom function) happen when the user clicks/tabs out of the textbox and NOT having to click on a button or into another textbox?Do you recommend having a separate button for performing the custom functions?
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Mar 20, 2012
which way do you think is best? Using connection As New OleDb.OleDbConnection(My.Settings.CustomerConnectionString & My.Settings.CustomerDatabasePath)
Using command As New OleDb.OleDbCommand("SELECT [customer] FROM [tblCustomers] ORDER BY [customer] ASC", connection)
connection.Open()
Using reader As OleDb.OleDbDataReader = command.ExecuteReader()
[Code]...
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Jun 27, 2011
Its my first time here. And I'm a new to programming and to VB.NET too so please don't mind if I say or ask stupid things :POkay here's my question. Let's say I have a table which contains student details. (Student Code, Name, DOB, Sex, Address, Contact No) and I have a grid which shows ONLY the student code and the name.
Now What I wanna do is when you double click on a cell, ALL the data related to that particular row should be loaded into a form with textboxes.
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Mar 2, 2010
I'm trying to load data into a DGV row at a time from a dataset and keep getting the following error on the highlighted line.
Private Sub LoadClientGrid()
Try
grdClientList.Rows.Clear()
For Each row As DataRow In rsClientGrid.Tables("tblClients").Rows
Dim grdRow As New DataGridViewRow
[Code] .....
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Dec 22, 2010
I have here a huge csv file with millions of rows entries. I want to load this data in a vb.net application, what datatype should i use, datatable, array or sth. else? It needs to be as fast as possible. how i can optimize the loading of the data? I once loaded this data in a datatable and it took days.. then i exportet it as xml data and loaded this xml file with the data. this was about thousand times faster.
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Jun 10, 2011
I have an xml file called "QuotesxmlDoc", in my program I have written code for a search screen that searches the xml file for titles or keywords in quotes saved and the information is then shown in a datagridview, see the code below:
Private Sub btnSearchQoutes_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearchQoutes.Click
Dim xmlnav As XPathNavigator
[Code].....
On the main screen of the program, I want to show all the saved quotes from the xml file in a datagridview, I just need to show the date, category, author, title of the quotes, I also need the datagridview to refresh everytime a new quote is saved.
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Nov 23, 2010
Try something along these lines:
TextBox1.Text=(dt1.rows(DataGrid1.CurrentRowIndex).item(0).tostring)
where dt1 is the datatable you're using as the data source and you want the data from the first column of the grid to be shown in the text box.
dp.SyntaxHighlighter.ClipboardSwf = '/dp.SyntaxHighlighter/Scripts/clipboard.swf'
dp.SyntaxHighlighter.HighlightAll('381571b4631840c6b8a8abfe5b54ed97')
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May 15, 2012
Loading into a Datagridview, Nothing seems to work no Error even with test data Added.
Here is some code
Dim SqlConnectionString, SqlCommmandText As String
Dim SqlAdapter As SqlDataAdapter
Dim Table As DataTable
[code]....
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Oct 2, 2009
I have a small VB program written using VB Express 2008Part of it uses an Access database this all works fine using the custom classes.I want to extend it to use some parameterised settings which I have stored in a table in the same Access database .I want to load these parameters from the table at program startup, then use them later in the code as needed.In SQL I want to execute :-select parameter, parameter_value from system_ parametersthen store this in an array which I want to index on the parameter column/elementAny suggestions on how I can load this data into the array ?
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Oct 14, 2010
RichTextBox1.LoadFile("c:pic.jpg", RichTextBoxStreamType.PlainText)It seems like it loads the data correctly, but the data is all wrong. I know this because when I use a packer sniffer, the data of the file that I sent is different when I sent the file manually.ou can also try RichTextBox1.SaveFile("c:pic.jpg", RichTextBoxStreamType.PlainText) after the picture of the data has been loaded and the picture becomes corrupted (won't show any picture anymore)
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Mar 25, 2009
I have created a project with a search form. add new record form and a also have an edit record form.Under the add new record form I have added an attachment button an a opendialog where I can select multiple files, so far this is working great, then I add the name of each file that I select and added to a listbox, so far so good,for example:
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Jan 4, 2009
I have an webbrowser, and I want to save the start page into an XML file... I have a textbox where I can input the start page url and an "apply" button, I got the apply button to work, and the URL saves into my_start_url.xml.
[Code]...
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May 14, 2012
I am trying to show xml data in an Ultragrid. I have tried using Ultragrid.loadfromxml and using the location of the file and i have also used a file input stream and throw that into the load xml method
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Sep 1, 2009
I have a tab control and what I want to do is when I click on the tab, data is loaded into the DGV. This does not happen until I click on the tab page several times and then the data is shown. What I did was I took the dataset fill from the Form_load and put it in the Tabpage2_GotFocus procedure thus:
[Code]...
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Oct 15, 2009
Our application is using VBSQL.OCX on Sql server 2000 to create temporary tables and load pipe delimited data from a text file with predefined format into the tables. It is failing intermittently doing this. 99% times it works perfectly. But on occasions it does fail with error. Once the process is rerun with the same input file it runs successfully.Basically the architecture is of Store/Head Office where there are around 200 remote stores sending set of data files to the Head Office. At HO our application sequentially processes each store which has all the set of files received, creates a corresponding table, loads the data from the file into the table and moves onto the next store.If it is for some reason not able to load the file for a store, it gives a failure message and continues with next store.Error which the OCX throws is "Attempt to convert data stopped by syntax error in source field"
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