I have a bit strange problem in my application. I have more binding sources then one in my different forms. All of them work great when editing, deleting the data except one. But this one is a bit different from others. I'm using it only for updating and deleting. You can't add new records using it. And also its dataset doesn't contains any Insert commands in it. That's the difference.Now problem is:
After deleted the rows (using BindingSource.RemoveCurrent), it doesn't mark rows as deleted. I call BindingSource.Count method after deleted rows, it sill counts deleted rows. So it seems it doesn't update the dataset. But it is. Dataset.HasChanges returns true.
It seems like when there is only one row at the data grid view with a data source pointing to a data table, it's row state for the data table doesn't change when editing. It remained "unchanged" reguardless to how many columns I had entered. However,after editing, when you click on a different row or click on any of the column headers to change their sorting, the row's state from the data table then gets changed to "modified". I'm not sure why the data table's row states gets changed only when you do those things instead of finishing editing itself. Couldn't the data grid view be able to change the data table's row states when you finished editing a cell?
a table of addresses and a bindingsource for the table a enum list of address type: 0 = "Mailing", 1 = "Physical", 2 = "Shipping" etc...
I would like to bind the datasource of the combobox to the enum so it displays "Mailing", "Physical" etc. Then I would like to change the bindingsource position of the address table based on the user selection of the combobox.
Here is what I have so far:
cbxAddressName.DataSource = New BindingSource(ApplicationEnums.GetEnumList(GetType(ApplicationEnums.CompanyAddressType)), Nothing)
I was asked by a client to create a tool that would let a user add/modify/delete/read content from a database. The content can be read from TextBoxes.
My question is, what is the best way to manage GUI locks/unlocks for the different states of the program. IE: If I'm in a "insert" mode, some GUI elements should be enabled, and some not. If I'm in the "read-only" mode, a bunch of them should be disabled... etc.
In my career I have seen literally dozens of ways that people choose to handle implementing state and country data (as in NY or USA). I've seen enumerations, multi-dimensional arrays, data driven classes from XML docs or databases, and good old-fashioned strings.
So, I'm wondering, what do people consider the "best way" to handle this very common implementation? I know that most of the answers will be based primarily on opinion and preference; but, I'm curious to hear arguments as a recent discussion for an app I'm working on has resulted in a small debate.
I am having with what appears to be a ASP.NET page life cycle issue. I currently have a user control embedded into my page. Now depending on the options chosen from the menu item list, the page can be in one of three states represented by a PageStates Enum within the control. The page on selecting the menu item merely updates the a property exposed from the control
Initial State (nothing congifurable) Editing (this uses a dropdown extender and makes a gridview within it visible) Adding (this uses another dropdown extender and makes the same the gridview visible however with different properties)
PROBLEMS
The page will only get itself into the correct 'state' if the menu item is selected twice Controls are visible on the gridview when they shouldn't be The page 'state' seems to lag one state behind
I think the main problem I having with this is that the grid view has check boxes drawn if the page is Adding mode, however you would need to select the Adding menu item option twice to get it into this state and I believe it is because I am setting the page state when the menu item is selected however the grid rows are already created at this point ( I am dynamically creating the check boxes in the grid view within the RowCreated event
I have cut and paste the fifty states on one box in the order in which they entered the union. I have two buttons, one to alphabetize the states and one to reverse alphabetize the list. Here is the code for alphabetizing the list:
Private Sub btnAlpha_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAlpha.Click lstOutput.Sorted = True
[Code].....
How can I put the list in reverse abc order without using an array? I've tried a variation of the above code, but it did not work?
I have a CheckedListBox populated with specific records from an Sql table . I want to update each record in the table, only if the checkbox checkedState = True, so far I can update all or none. This unworkable code will hopefully give an idea of what I need to do.
I need to display info about each of the 50 states when selected in my program. I have one combobox with all the states as items inside, one button that you click to get the info and one listview for displaying the info. Here is my code so far:
Imports System.Text.RegularExpressions Public Class Form1 Private Function getinfo(ByVal state As String)
I did a MDI Winforms application and noticed behaviour that I have a question for. If one of the forms is opened with a Maximized Window State and another form is opened with a Normal Window State, the form Window State that used to be Maximized is changed to Normal. Can several windows be open in a MDI form with different window states at the same?
I'm working on a project where I need to trigger an event when a switch is closed. It is my understanding that it is possible to use the control lines on a serial port and read whether the switch is closed or not. I've found a schematic of how to connect the switches to the pins, but I have not been able to find any example code on how you can read the state of the switches.
I am currently developing a chat application and am trying to include:
Various states, like MSN does, available, busy and away.If the user doesn't touch the keyboard for one minute, the state of the user isto be changed into Away.Or something similar to these.I also need the program to be able to play a sound while running.
I have to make a program that uses 2 arrays, one with the states name and one with the capitals names. I have to make it to where it randomly selects a state and asks you what the capital is, and gives you 4 choices in the 4 radio buttons provided. My problem is getting one of the randomly selected answer choices to be the Correct answer.
Here is my code so far: Public Class USCapitals ' Declare module level variables. [Code] .....
I have a treeview control on my form, i am trying to load an xml into the treeview to show cities/states (example at the bottom of the page)The xml that treeview is loading from looks like:
I am currently attempting to create a VB.Net script that pulls up information on installed printers. I am using Visual Studio 2010 SP1, and as my target program needs to run on older machines, is currently built using .Net 3.5.Looking online, there are several methods on how to do this, one from url...the code is supposed to use System.Management as you can see. However, after importing System.Management, Visual Studio throws an error and states that ObjectQuery, ManagementObjectSearcher, and ManagementObject are not defined.a quick look at the MSDN forums shows that ObjectQuery is a class of .Net 4, 3.5, 3.0 and 2.I figured the error might be because I didn't have the .Net 3.5 SDK installed, so I installed the .Net 3.5 SP1 SDK to no avail.just to make clear, I am importing System.Management at the top "Imports System.Management"
I want to write a program to do Markov chain, but my states are quite large. First of all I calculate all the transition probabilities and revenues for all states(1381860 total states), and store in a multidimensional array. Public RevArr(0 To 9, 0 To 750, 0 To 282) As Long
After that the iteration of markov chain should use these as inputs to calculate the steady-state probabilities. But when I try to run the main code I got this error.Exception of type 'System.OutOfMemoryException' was thrown.
The following is the declaration of second array I add just another dimension for storing all the iterations, but I get this error. Dim stateprob(IT + 1, 0 To 9, 0 To 750, 0 To 282) As single
In this code i enter a name and it is assign to a radio button. but when i try to enter the name and click the confirm button it states"flight is full" i'm not sure where things are wrong.
Here is the code.
Public Class Form1
Private availableSeats(7) As Boolean Private buttons(7) As RadioButton
I imported a website made in visual studio express 2008 to visual studio express 2010. When I run the home page I get the following error:"It is an error to use a section registered asallowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS."
the statement Dim state(49) As String and maintain a list of certain states. The list of states should always be in alphabetical order and occupy consecutive elements of the array. The buttons in the program should give the user the following options: (a) Take the state specified by the user in a text box and insert it into its proper position in the array. If the state is already in the array, so report. (b) Take the state specified by the user in a text box and delete it from the array. If the state is not in the array, so report. (c) Display the states in the array. "
Private Sub states_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load state(0) = "Alabama"
I think I'm making a mountain out of a mole hill. I have a DGV that contains 5 columns made up from 2 different DB Tables. Here is the procedure that populates the DGV.
Private Sub SetBindingSources(ByVal strClientID As String) Try 'This section of code populates the grdAddresses DataGridView
I use the BS Filter and would like to iterate the filtered dataset of the DataTable using the Bindingsource.
I know I can do a MoveFirst and the MoveNext and each time using the BS.Position get the correct row in the underlying DataTable. But how do I know when the sets ends? I'm sure there must be such a property, but what is it?
I'm trying to display a DataTable using a DataGridView and a BindingSource as such: (assuming the DataGridView1 and BindingSource1 has been added using the IDE)[code]...
I am using several tables, say A, B and C. How can I put these into a variable so that I can use e.g.tnameBindingSource to represent the bindingSource according to the parameter passed?I have spent hours trying to do this in vain.
I have one datagridview control, a BindingNavigation and a Binding control on my form. I populate the datagridview control through the code. Moreover, the datasource properties of the DatagridView and the Binding controls are assigned a value through code (I didn't specify anyting in the properties window). The same for the bindingsource property of the BindingNavigation control (I assign a value trhough code). My code is the following:
[Code]...
This code brings and shows the right results in the datagridview control, but the navigator control is inactive. I know that I have to bind the controls(DataGridView + BindingNavigator) to the BindingSource control. Is this a problem that I tried to do this by coding?
How may I filter a bindingsource between 2 numbers? Obviously "column_name BETWEEN Num1 AND Num2" does not work, since "between" operator is not supported
I'm trying to use the bindingsource.find method to match a datarow column with a user entered text. I know that using BindingSource1.find("columnName", searchString) will work when the user enters the exact string. What I would like to know is how to find a row that is close to the string using a wildcard search... a good example I guess is:dim searchString as string = textbox1.text 'lets say the user enter "se"dim index as integer = myBindingSource.find("columnName", searchString) 'I would like to find the firs record that starts with "se"I can achieve the idea using the bindingsource.filter method but this will interfere with other parts of my application if the bindingsource is changed.
I want to sort the binding source column (Product Code) which formatted like (AA-AAA AAA AAAA)
but i do not want straight sort on product code column, i want the sort as :
substring of 1,2 + 8,3 + 3,3 and then the rest of the column.
I know i can do it in the table direct using the OrderBy and the substring function, but the problem is that sort is not static it is dynamic according to different status means it change the substring order.
