I have an isue, may be its simple. but i am not able to rectify this. Here it goes. I have a form to display data from database.
The form contains Tab control with 3 tabs,it has some text boxes, combo boxes and date pickers.I retrieved data from database in to data-set (ds) using a data-adapter (da) then assigned it to a dataview (dv)
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Below code creates a set of comboboxes which are bound to the data table. This works almost fine with one exception. Whenever i change selection in one of these comboboxes, any other combo changes it's selection too.[code]...
View 4 Replieswith more control over changing values in a data bound DataGridView.On form load, all the data is pulled down from the attached database and fills the gridIf I want to change one of the values in the grid, I can put my mouse cursor in the cell, change the entry and save it back to the database.
View 10 RepliesI have created several WPF User Controls. The lowest level item is 'PostItNote.xaml'. Next, I have a 'NotesGroup.xaml' file that has an ItemsControl bound to a List of PostItNotes. Above that, I have a 'ProgrammerControl.xaml' file. Each ProgrammerControl has a grid with four different NotesGroup user controls on it (and each NotesGroup contains 0-many PostItNotes.
Then, I have my main window. It also has an ItemsControl, bound to a list of Programmers.
So, you end up with a high level visual view of a list of programmers, each programmer has four groups of tickets, each group of tickets has many PostItNotes.
The trouble I'm having, is that I want to respond to a mouse click event in my mainWindow's code behind file.
I can add a MouseClick event into my PostItNote.xaml.vb file and that is getting called when the user clicks a PostItNote, and I can re-raise the event; but I can't seem to get the NotesGroup to listen for that event. I'm not sure if that's even the correct approach.
When the user clicks the PostItNote, I'm going to do a bunch of business-logic type stuff that the PostItNote control doesn't have a reference to/doesn't know about it.
I need my app. to Create an Control Array at runtime that will consist of up to 50 Data Bound Labels. The app. will first be checking the 1st database field (Ing1) to see if there is data, if so then only create the 1st Data Bound Label (lblIng1) and then check the next field and so on.
The problem is that VB 2008 dos not seem to support Control Arrays. There must be another way to work around this.
I have DataGridView display Customers Details. The DataSource are from DataSet. After the user have created a new customer record and updated the SQL SERVER Table, Instread of refreshing the whole DataGridView I am trying to add new rows with data from the TEXTBOX into the DataGridView and it generated this error message: Rows cannot be programmatically added to DataGridView's row collection when the control is data-bound This is the coding which the error was generated from:
Private Sub FRefreshDataGridViewRow()
'use strmode to determine New or Edit existing record
Dim strCell1 As String = CType(Me.txtCustId.Text, String)
Dim strCell2 As String = CType(Me.txtCompName.Text, String)
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I have a windows form with multiple TextBoxes that are bound to a DataSet of type XML. I load text into the textboxes using DataSet.ReadXML method in the form's load event.
I have another windows forms application which edits the XML contents in that XML file.
How do I force the textBox controls on this form to refresh once the XML datasource file items are changed?
Can anyone tell me why "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound." I keep getting an error "Invalid Operation Exception was Unhandled" error. All I am attempting to do is allow the user to select products from a list(or a second datagridview) and have it added to the datagridview so they do not have to type in every cell since the other cells are not visible because they do not purtain to their needs. Plus they will be able to save all items at the same time.
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I created Dataentry forms. In the form there are so many controls like DropDowns and textboxes. I am using Access database. Now I enterd the few records into the controls, and these records are saved into the Database. But now if i enter the any data which i recently saved in the database to the textbox or any other control then the remaining controls should be display the related data.
For example i have 4 controls in my form one is dropdown and 3 are textboxes. If i select the data in the dropdown then the remaining 3 textboxes shows the related data. How can i dispaly the corresponding data to the other controls?
I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."
View 2 RepliesI have a very simple app that just opens an SQL table using an OLEDB data adapter and binding that to a DataGridView control.I have a button control that simply calls the update method of the data adapter.I have added code for Update, Insert and Delete for the dataadapters update method to use.The table the I am playing with has 10 columns, and the update is working correctly.When I go to add a row to the datagridview and move off of the added row then click the update button, I get an error stating that there was no value given for one or more parameters.This is actually the case, I checked the insertcommand paratemers and all 10 of them have "Nothing" for the value property.I will provide code if necessary, but what would cause the parameters to not be populated with the values from the datagridview control for the insert?
View 5 RepliesI have a property declared like this[code]...
I am trying to get the button to be enabled/disbaled based on the property. The properties value changes fine, but it's not updating the button's IsEnabled property.
I have a property declared like this
Private _isupdateenabled As Boolean
Public Property IsUpdateEnabled() As Boolean
Get
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I have a ListView and I have set up my Delete Link button. When I clicked Delete however I get "The ListView 'ListView' raised event ItemDeleting which wasn't handled." So I decided to try and implement the DeleteLinkButton_Click() and ListView_ItemDeleted() ... however I can't figure out how to identify which row I've selected for my DeleteLinkButton_Click().
I didn't bind my source through a control instead I used the following method.
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I have a form with some textboxes on it. The textboxes show values from a table. I have a binding navigator that lets you step through the records in the table and the textboxes update. What I want, is to have a control, say a listbox, that allows you to select a value which will filter the data behind the controls so that you only have one record.
So, for example, say you have a table of contacts. There are textboxes on your form that show name, phone, address etc. You could then have a listbox that showed a list of all the contacts and you could select one, which would in turn the textboxes. The filtering field could be contactID for example.
I have an app that downloads from a networked SQL database to a dataset and also to an XML file on laptops. Laptop users will take their executable and the XML file which the local dataset will read.Although I can get gridviews etc to bind to that dataset syntax such as
"TextBox1.DataBindings.Add("Text", ds, "fname")"
I want to make a program in Visual Studio 2008 in Visual Basic. It involves a web browser and I want to make it auto refresh and allow people to choose the time period in which they want to auto refresh. It won't take user input but I have checkboxes that are preset. I think this may be possible using a timer and the WebBrowser1.Refresh() method. If I am mistaken, please correct me and tell me how to do this.
View 1 RepliesI am developing a google maps ap, and want to refresh the map with new detail on demand. The initial problem offcourse was that the webbrowser control does not reflect the changes (still keeps the original htmltext) and new document text and refresh. I understand the document text is set once, and cant be changed... apparently.
I have tried
navigate("about:blank")
document.stop
document.new(true)
doevents
All the collected user knowledge on this problem, only get me half way. I can get the page refreshed using some of the techniques above, but it then gives me a script error and an error 53, which both has no details or origins.. just blank errors.... after clicking through their error windows, my page refreshes.P.S. I don't know if my javascript events that are bound to the webbrowser control causes the errors. Some have suggested that the errors are due to the document loading without all its references being closed/open...
I have two webbrowser controls in my application, and I need them to refresh every so often, for example, every 5 minutes. How do I do that?
View 4 RepliesThere is PreviewKeyDown but I don't know how to prevent it from passing the keypress to the browser using that method & WebBrowserShortcutsEnabled will disable them but not allow other stuff like Control+C,Control+V and even the delete key in a textbox wont function as well as technically any F keys will not be passed to the flash I have running in the web browser control so the reason for disabling was made moot because the keys still aren't usable in the flash game either because they don't function at all anymore or it has an action already(F5-refresh)How do I disable it without stopping it from being used by the underlying webpage - flash in this example....
Return returns execution to it so it ends up calling keydown like normal, there is no actual keydown event for the webbrowser control or id use that....I cant block navigation because a refresh appears to not call any of the navigation stuff....End stops execution of the whole program it seems, not just stopping that part of code in its tracks...Stop just pauses the program in the debugger....Exit has the same result as return does....
Is there no way to either use PreviewKeyDown to not return execution to the caller....or maybe some kind of await procedure(visual Studio 2011 & its await procedures/async procedures) or something which will never finish... them using it a lot(the F5 key) wont use a lot of cpu while it waits for something that would never happen....Or just any other method which could make this work how I need it....
Using ASP.NET and VB.NET code behind, I have the following code:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim I As Integer = 0
For I = 0 To 10
ListBox1.Items.Add(I)
ListBox1.DataBind()
System.Threading.Thread.Sleep(300)
Next
End Sub
The intended output of the code is to update the listbox1 control at each iteration, but what really happens is it updates the listbox1 control after the entire loop finishes..Is there a way to update the listbox1 control as its intended by the code logic?
I have a Visual Basic .NET application that calls an Oracle Stored Procedure. This stored procedure does a lot of processing and can take up to an hour to complete. While this is running, if the user moves to another application say Microsoft word, then eventually returns to the VB window to see if it completed the window is often blank (just a white background).
View 1 RepliesI have several custom controls inside my project, just added a new class and then inherit the original control. For example i have a Custom DataGridView Control (CustDGV), that defines several properties in the constructor of the control.Now i have one problem and one issue, the problem, if i change the CustDGV i don't know why, the forms that are using the control doesn't update the changes... The only way it's removing and adding it again.. not very useful when i have several event's already defined for the dgv.How do i force the form to update the control?The issue it's that some of the properties doesn't get applied, for example i set the column header height and the disable resizing in the constructor, but if i run the code this two properties doesn't get applied, i need to define them in the form where i use the control to get the results that i expect..The order of the properties in the constructor? The properties in the properties window override the constructor ones?
View 17 RepliesI don't think this can be that hard but I just can't get my head on it. I have a connection to an Access DB, put three text boxes representing three columns in the DB. Using the DataNavigator everything works. But what I want is to be able to enter text in say textbox1 and have textbox2 and 3 update, like when using the navigator.
Add: I want this to function like when you enter a record number in the Navigator and hit Enter, bam, goes to that record and all the text boxes update. I want to enter a number in textbox1...
I'm seriously about to abandon this DataRepeater. I don't want to. I want greater design control than the DataGridView. I've played with various Events for days and have settled on the CheckBox.CheckChanged Event.
What I'm trying to accomplish: My Bound DataRepeater has an UnBound CheckBox in each DataRepeaterItem.When the user 'Checks' the CheckBox, I want to change the value of a NumericUpDown Control to the value of a hidden, Bound Label.
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This causes other, seemingly random, DataRepeaterItems (Rows) to also become Checked and thus it's NumericUpDown value to change.Am I going about this from the wrong angle? Can't see the forest for the trees?
I have a User Control which renders a simple drop downList into the page.By default, only certain values are returned depending on User Details, but the user may request a "full" list.I'd like this full list to be generated by pressing a reload button.Being new to .NET I am struggling to get this to work and not really understand the results I get when Googling or finding stuff on this site. Is Classic ASP I'd have made a page that renders this and called it using jQuery
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I've found this link: [URL]..Using-jQuery but am unsure exactly what it is suggesting, mainly I think, because I use VB and don't completely understand how to convert that C# code there.Using .NET 2.0, jQuery and VB, does anyone have any suggestions on the simplest way to accomplish this?
I've in my app many self created custom controls (not as a real active x control, but a simple modified class). In this case I'm writing about a groupbox. I've placed many of them on different forms. But now, I want to change the backcolor of this controls. I change the backcolor in the class, rebuild the project, and the backcolor didn't change. Why? I don't want to place the groupbox again, it would be too much work. It should be a chance to do this whithout placing the groupboxes again.
View 1 RepliesI am using AjaxToolJit Tab Container and the problem is when i refreshes the page the default tab is set to 0 but i was in 4th tab when i refreshed the page.AutoPostBack=true
for a while but when i used UpdatePanel in the same page causes the same problem again.
I'm developing a remote control program that uses a mysql database as the bound beetween the server and the client.The only problem is that cause of mysql being really varnuable to crashes i made it in a way that it checks for information every 10 seconds so things doesnt get messy. [code] For some reason after 10 seconds the connection is mysteriously aborted and the reader gives a fatal error.How can i extend the time limit to >10 seconds ?
View 3 RepliesI have a semi-transparent custom control in vb2005 - works fine, except I can't get it to update/refresh correctly. If I update the custom parameter _backgroundColor, the control appears to be overpainted - e.g. each attempt to update the colour of the control overpaints the existing colour - until it becomes a solid block of colour. However, forcing a refresh of the form makes the control display the correct colour. Any ideas? I don't want to have to repaint the form just to get this control to render correctly. Code for the custom control is below.
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