I am using a form with a combobox which is populated from an SQL database table. This works OK but is it possible to leave the box blank on the form until a value is selected.By default the box has the content of the first record.
View 4 RepliesIn the form below you see how the initial selected item is the first record of the table.. these controls are bound.. I want to initially show "Select one" in the combo box or nothing at all and the other controls not to be bound until an actual item is selected in the combobox..
View 1 Replieshow do i set my initial value for textbox as blank. I tried to I load my textbox a data coming from my database but what my problem is that I need to set my default value for textbox as blank because everytime I load the forms the textbox will be filled immediately with data. This is how I bind my textbox and combobox after loading from database.
cbxJoblvl.DataSource = myDataSet.DefaultViewManager;
cbxJoblvl.DisplayMember = "Joblevel.lvl";
cbxJoblvl.SelectedIndex = -1;
txtLvlName.DataBindings.Add("Text", myDataSet.DefaultViewManager, "Joblevel.lvlname");
I have a number of FTP routines all based on the code below. Why does this take 15 seconds to run the first time? [Code] If I use an FTP program like FileZilla or CuteFTP to connect to the same FTP server they make a very much quicker connection. Any ideas?
View 10 RepliesI am having issues when trying to populate a combobox that is dependent on another combobox. Populating the first combobox works as expected but attempting to set the value member or display member properties of the first combo box cause its selected index changed event to fire. That event seems to fire before the first combobox is fully loaded. The issue is then raised when trying to populate the second combo box, since it is dependent on having a valid value member to complete the dynamic sql statement, and at that point in time, there is no value member.
I can�t imagine that this is difficult but searching hasn�t yielded me any results. Should I be using a different event? What is the right way to do this?
I have a simple workaround in place - not allowing the second combo box to attempt to populate unless the first combobox has an index greater than zero but this hack is no good since it clearly prevents the user from selecting the first element in the first combo box.
Private Sub SpecialsForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim sql As String
Dim dt As New DataTable
[Code].....
I am Loading a Combo box with values..
cbox.Items.Add(New combodata("A", "Red"))
cbox.Items.Add(New combodata("B", "Black"))
cbbox.Items.Add(New combodata("C", "Blue"))
[code].....
I have data like this in my text file
(23.0001.0)
(23.0002.0)
(23.0078.0)
[code]......
If I place it on the form, I want to have the text as the name of the control, like label1, label2, etc.[code]...
View 1 RepliesI am making a simple home inventoy windows form that uses writing to a text file, reading to a text file, and arrays of structures. The first two I have a good idea how to handle but, the third one is where i have a little trouble. I dont know how to initaializing the data in my structure, how do i initialize the initial position since it has no length? I have initialized them in my module [code]now i need to assign the first value to it, but im not really sure how without anything in it to use my length method
View 6 RepliesI'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?
View 6 RepliesI've never come across this before:I have a series of text boxes. The text of these boxes get set on page load. then I have a submit button that calls a sub to update the table with the new values (text) in the text box. The problem is it is keeping the original text not the text that is CURRENTLY in the textbox. Anyone come across this before? Or know how to get round it?
[Code]...
When i open a file with the proces method en i try to open another file, the openFileDialog box start with the last directory and filename. In the property i write a initial directory. How can reach the situation that the box always start with the initial directory i give.
View 1 RepliesI have a datagridview and need to do some formatting to it. On load the row 0 column 0 cell is highlighted. I need users to click on datagridview to select a value. The issue is with the initial load highlight it looks like the first row is already selected when in fact it is now. How can this highlight be disabled? Each row of has 7 cell, the user is able to select any of the cell of a row and the corresponding row ID is selected. The issue is that only that one cell is highlighted.
I would like the entire row highlighted regardless of what cell in that row is clicked on. One of the columns is a status value. I would like to color the text based on the value. For example if the Status is opened I want the text to be red, if the status is closed the text color should be default.
I need to run an If Statement that will check a few conditions.
Basically I want to get it to check a value held in a variable "Temperature" and if the value is within "1" eaither way i.e. +-1 of the value held within the variable to then to output a text string to Label200.Text Else if the condition is not met then out put another text string to Label200.Text.
Example:
Say if Temperature value held in the variable Temperature is 8.5 the if statement checks to see if the DewPoint value is "between" +-1 of the temperature value. i.e. 7.5 to 9.5 as well as the value in Humidity is equal to or greater than 90 and Pressure is Less than or Equal to 1013.25 then the conditon is met, else the conditon is not met.
I have put some code together below in NotePad++ to see if what I am trying to do is the correct way to go about it (note I have not yet tried this code in VB.NET as I don't have it at work).
pass comment on the code and if it is wrong explain what I should do to get it to work.
Dim DewPoint as Single
Dim Temperature as Single
Dim Humidity as Single
[Code]....
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?
View 2 RepliesI'm used to Access and have just created my first form in VB in Microsoft Visual Studio. I have added four check boxes to a form and they are connected to a SQL database and working fine with one exception: When I create a new record, the initial state of the checkbox is null so it shows a green square in the box and you have to click twice to actually place a check in it even though in the properties, the three state is set to false.
When I go into DataBindings/Advanced, and set the null value to zero, it fixes the problem with starting out as a null state in a new record, but then when I create a new record it carries the checked and unchecked state from the previous record over. (If it's checked in the current record and saved and then you click on new record, the checkbox stays checked.) I can't even figure out the correct syntax for manually setting the checkboxes to a false state in the new record event to fix it.
My For... Next Loop will not work and I cannot for the life of me figure out why. I have tried to display the results in a label and a text box with multiline enabled. Doesn't seem to matter. It's probably something obvious I have been overlooking for 2 hours.
Option Explicit On
Option Strict On
Option Infer Off
[Code].....
I have an application with three panels, each containing radio buttons. At design time, all are set to Checked = False
When I build & debug the project, one radio button on one of the panels is set to checked = true.
For the other two panelsl, none is set to Checked = True.
I want no radio button set to checked = True when the project starts. How do I engorce this?
Im trying to Separate Last name, First Name and Middle Initial. File is csv format, here is an example:
[Code]...
I want my user to only be able to open files in the initial directory that I set on OpenFileDialog. I have googled a bit and found you cannot restrict, but that was information from a few years ago and I'm not sure what version. Has this control changed at all in VS 2008?
My application is handling it okay if the user does navigate out, but it would be more concise if I could prevent him from doing so in the first place. And the fact that I have found others who wanted to do this also, makes me think it might be a nice property to have built in.
I'm using System.Net.CookieContainer. I fetch an initial webpage which populates the container. I want to make a copy of this container to use in the future. Is there an easy way to do this in .NET? I'm still new to .NET.
HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://www.google.com");
HttpWebResponse resp = null;
CookieContainer cc = new CookieContainer();
req.Proxy = null;
[Code]...
We want to Replace some text from a textbox (multiline) with = the text in our combobox and we want to replace it with its new one (in a textbox)
heres our code
If TextBox7.Text.Contains(ComboBox1.Text) Then
TextBox7.Text.Replace(ComboBox1.Text, TextBox1.Text)
End If
so that says, If the textbox(multiline) contains whats in our combobox, then replace it with the text in textbox1..
I'm currently developing a chess program. In my program, the problem I'm currently having is the slow drawing of the initial board. Here's part of my _gameGraph.DrawImage(MyResources.Marble_White, New Rectangle(x, y, 70, 70)) The code here draws the black & white squares using a for/next loop. I later use another for/next loop on the array holding the piece values, which uses the same type of function to draw the pieces on top of the squares. Both the pieces and the squares are .PNG images.
[Code]...
i have wrote a program that allows users to open and save text files etc and it all works fine. All i was hoping to find out is if it is possible to specify the initial folder you are taken to when using the OpenFileDialog. This would be useful as the users only open and edit files from one folder which takes quite a bit of drilling down to to find.
Public Partial Class MainForm
Dim i As Integer = 0
Sub OpenToolStripMenuItemClick(sender As Object, e As EventArgs)
[Code].....
I am trying to select a folder from an initial directory and store the initial directory with the selected directory in Folder1Dir. Also not sure how to dimension OpenFileDialog1.
[Code]...
I have a problem setting the initial directory in an savefiledialog object. when the dialog opens it always opens up in the directory I specified in an earlier version of the application.
Public Sub New(ByVal animalManager As AnimalManager)
InitializeComponent()
InitializeDialog()
'declare and initialize a default directory for storing application data files
[code].....
The message box show the current directory of the applcation as expected.
I'm looking for do this in vb.net:
hy how are you
TO:
Hy How Are You
My goal is to display a list of tasks with checkboxes. Checking the checkbox for a task will update the display of the task so a line-through text decoration will appear. Everythign is working great, except I can't figure out how to initially show the list of tasks with a line-through if they are completed, or normal if the task is not completed. Here's code excerpts:
<asp:Listview .../>
...
<ItemTemplate>
<asp:HiddenField ID="TaskCompleted" runat="server"
[Code]....
So this works great, when I click on a checkbox the lable gets a line-through or none based on the checkbox. Only problem is when I initially load the page, I can't figure out how to update the style of TaskLabel to show a line-through or not. I've tried some various routes, but nothing is panning out.
I have an MVC application which sets some session variables based on internal static IP addresses.I have built an ApplicationController to override the OnActionExecuted sub in MVC for data that I need to use throughout my application.However, the code below, which is just a snippet of my code but is edited for my post, only partially works. On initial page load, the session variables aren't saved, but after a page refresh they are. The issue I have is that these need to be saved on the initial page load.
If Session("Item1") = Nothing Then
If IpAddressShort <> "" Then
Dim locInfo = cmsRepository.GetInfoBasedOnLocation(IpAddressShort).SingleOrDefault()
If locInfo IsNot Nothing Then
[code]....
Theoretically, if I'm correct, if there is no Session("Item1") set/if Session("Item1") is empty, then the rest of the snippet should run and set those variables.How come this isn't setting those variables on the first time the page load?
I am trying to concatenate initial and surname in my VB.net application but it says Incorrect syntax near '+' .
Private Sub populateClientname()
Dim cmd As New SqlCommand
Dim conn As SqlConnection = GetDbConnection()
[code].....