I 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
[code].....
with 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 this code:
Module Module1
Dim x As Integer = 1
Dim y As Integer = 1
Dim arr(x, y) As String
Sub Main()
[Code] .....
And with it I'm trying to change the upper bound of array dimensions. But I get this error:"Index was outside the bounds of the array".
I have a data-bound combobox that pulls values from a BindingList(of T). Combobox loads fine, correct values are displayed (I'm not using SelectedItem or SelectedValue). I'm using properties and connecting the data to the control via a bindingsource.
What I want is if the user types text into the combobox, I want the data from the bound table to change to that new text, i.e. edit the bound data directly.
Easy as pie to do with a textbox, but can't seem to get a combobox to work this way.
I was trying to use the validated event of the combobox to write the data to the datasource, but it doesn't fire when I press enter. Is that the way to do it? Can I not link the data to the combobox directly?
[edit]oops - stupid typo - this is resolved and explained in the next post[/edit] I've got a BINDING SOURCE - that I bind to controls - textboxes mostly. I create a row in the datatable behind this BINDING SOURCE like this.
[Code]...
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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I'm trying to make a program with transparent labels over pictureboxes and when I set the label Parent to the PictureBox the position of the label changes.
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 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.
[code]...
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 RepliesI 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 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.
[Code]...
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 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'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 want to allow blanks in BOUND textboxes that are bound to int and money columns.
It's not letting me - apparently it knows to force digits...
Is there anyone who can tell me the code for the below? Receive a lower bound and an upper bound of a range. Also receive a number of random numbers to generate. You must validate
1) the numbers are integers
2) the lower bound is less than or equal to the upper bound
3) the number to generate is positive (i.e., > 0).
Generate this many numbers in the specified range and keep track of how many of each are generated in an array of counters. Once all the numbers have been generated, display in a List Box the number, the raw count data, and the percentage of how many times the number was generated displayed with two decimal places of precision.
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)
[code].....
I have a DataGridView that is bound to a DataSet I created from a database table named Contacts. The Contacts table contains a field called StatusId. StatusId is a foreign key to a table called Status. The Status table contains StatusId and StatusName.
[Code]...
I am reasonable new to programing and have ventured in to using VB.net after creating macro's etc in excel, as this seemed to be the easiest transition into the world of programing.I am creating a application to work with an access database and before I submit the forms textboxs to the database, I check to make sure each field is filled in and if it isn't then I highlight the field by changing the label back colour to orangered.
What I have is a bunch of textboxes and a label above each saying what the field is. so for example the textbox name is txtBox1 and its label is lblBox1, txtBox2 - lblBox2 and so on.So what I thought I would try and do is, as the user leaves the txtBox after editing, the label background colour would be changed back to transparent.
As I have multiple txtbox's I thought I could do this using sender to get the name of the txtBox on leave, strip the first 3 letters txt and change them for lbl cast it as a label, then change the background color but I cant seem to convert my string to a label control. can someone help me with what am i missing or not doing.
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I need to allow the user to rotate a control (the control inherits from a TextBox) in 90 degree increments so the text can be read from either side, or even upside down.
I'm guessing I could override the control's paint event and just paint it in the orientation that I want, but I'm just wondering if there's a quicker/built-in way?
I have added a few text boxes to my report in MS Datareport.I want to assign value from my variables to these controls.how to access and address these controls.In VB6, I could simply do it in the code part of the data report.
View 2 RepliesI'm quite new at this but I'm trying to change the look of a tab control other than the options provided in the control's properties. In short I want to create a large tab that will fit a picture but I don't know how to change the size of the tab. I also want to make the control look somewhat different than what the control provided with VS.NET looks like.
What I need to know is how to create a custom control that operates the same as tabcontrol but looks different than the traditional control provided with VS. I tried looking up how to create a custom control but all I could find was how to create one programatically and I don't know how it would apply to a tab control. Maybe the only way to do it is programmatically but I would rather play with the control in the designer than having it appear only at runtime.
I Have a VB.net form with lots of controls to save as config: textbox, radio button, check box... but these a Scatered inside tabs, panels, groups..
View 4 RepliesI'm trying to change the look of some controls in VB.An example would be a button, I now have a stack of 4 images on top of eachother. By using the mouseover events and such, I get the same result as a normal button. However, I'd like to be able to insert those images into a normal button like thing.
I know it's possible to do this by creating a custom control, but that'd end up with the exact same code, just in a different file.
However, the real issue would be a dropdown box and slidebar. I'd like to get them to look nice with my theme. (Background, buttons, borders. Things like that..). I got absolutely no clue on how I should do that.
I know that there's a tool to create controls, but that's from scratch and I can't get a grip on it, at all.
I am creating a program with a web browser component, and a tab control. Default, the web browser is anchored to the toolbar. In my program there is an option to make a toolbar at the top of the form visible.false. Is there a way to make the web browser anchor to the top of the tab control when the toolbar is not visible, and anchor to the toolbar when the toolbar is visible?? I have experimented with docking (fill) but then parts of the web browser become covered by the toolbar and status bar. I am still relatively new to visual basic 2008 so if you could please explain or provide code.
View 14 RepliesI am running into an issue with changing properties of controls on a VB.net project that I am working on. The portion of code that I am having trouble with is re-enabling a couple of buttons and a ComboBox after a Threaded operation completes. The point of it is to disable the buttons after clicking the main "run process" type of button (called cmdCrawlSearch) so that the process can run on a new thread while the form is updated with the status. I was able to learn about Thread Safe calls using delegates in order to update the Text property of the TextBox (txtOutput) on the form, and thought that enabling buttons would be just as easy, but when I am trying, I am either getting an "Object reference not set to an instance of an object" exception, or an "Exception has been thrown by the target of an invocation" exception (from the current version of code) with the InnerException being the Object reference exception. I am posting the portions of code related to the issue, then below it is the InnerException name and stack trace. Perhaps I am not using the Delegates correctly (since I still do not fully understand what can and can't be done using a Delegate.) Or there is a better way to do this.
[code]...