I'm an Access/VBA programmer new to vb.net. In Access I can do this using the controls collection of form, but I can't figure out how or even if I can do it with vb.net.
I want to change this:
'tcpWeek(x) is a tab control page
My.Forms.frmBookMain.tcpWeek1.Text = "Mytext1"
My.Forms.frmBookMain.tcpWeek2.Text = "Mytext2"
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I working on a project that includes to call a certain type of method to each control, i have this
Private Sub txtBcNum1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtBcNum1.KeyPress
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This code works like a charm if i want to allow only numbers and backspace on my textbox.Problem: I have 15 textboxes( txtBcNum1,txtBcNum2,....,txtBcNum15 ), what's the best way to call this function inside KeyPress method on each textboxes with out manually adding it to KeyPress method?
I have a bunch of string variables, string1, string2, string3 etc.At the end of my program I want to write these strings to a file, but I don't want to have to laboriously type out string1, string2, string3 etc.
It would be much easier to use a loop to dynamically refer to (string & loopcounter), ie reference the variable by dynamically concatenating its name from a string and a number. Python can do this with eval(). How does VB do it? I can think of loads of examples where it'd be useful. Otherwise I have to type out all the different conditions and that's not efficient.
I have 4 textbox on my formviz. txtQuantity0, txtRate0, txtDiscount0, txtAmount0When User Press Enter Key on txtAmount0 a new row of textbox is created as follows
txtQuantity1, txtRate1, txtDiscount1, txtAmount1
I have a Gridview that I create a dynamic footer wired up to the RowDataBound event.
However there is a 50/50 chance that 3 of the columns will have no data.
I want to be able to dynamically hide the columns with no data if possible.
I have tried doing this in the RowDatabound event by checking if the value is = 0 but that does not work because I think the event is called to early?
Is there anyway to refer to the values in the Footer row after ALL the data has been bound?
Ideally in VB
`Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
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I am trying to create a program, where the user click a button and this will add a custom control and then drag and drop them on the form.
What I want to be able to do is add multiple controls (by clicking this button) and for them all to have the same events. So basically they can add as many as they like of this control and then click on it and drag it anywhere.I know in vb6 there was the use of the control index but I am not sure how to do this in Visual Studio 2005?
Can anyone tell me looking at this picture what Value is or what it could mean/reffer to? (S-1-5-xx-xxx)I had to block out some of it since I am not sure what it means.
View 2 RepliesThis was explained in a recent thread - but I can't find it again :-( Why won't the following work? I am trying to set the bounds on 9 buttons - Button11 to Button19. All these buttons are already added in design time. qli() is a rectangle array.
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Im working on a project and just wanted to know to make a control refer to itself?I know that by using the word "Me", the system refers to the form but how about the control. I know that i can simply name the control (e.g. txtSurname.Clear) but if i was to use the code on multiple controls it would save alot of time if the control could simply refer to itself!
View 7 RepliesRefer to all of one type of control?
View 2 RepliesI have a problem with using a script that adds a NiceEdit toolbar to a text area when that text area is within an Ajax tab.I want to know if I should refer to it in a different way than just the ID.I mean the ID of that text area, I tried to take the text area outside the Tab Container, it works, but when I return it, it simply doesn't.[code]
View 1 RepliesSuppose I have a label control on a windows form called "UserName". How can I refer to that label programmatically using the label name? For example I can do:
For each ctrl as Control in TabPage.Controls
If ctrl.Name = "UserName" Then
' Do something
End If
Next
This seems quite inefficient. I would like to do something like: TabPage.Controls("UserName").Text = "Something" I did some googling but couldn't find a satisfactory answer. Most suggested looping, some said .NET 2005 doesn't support direct refenece using string name, and FindControl method was asp.net only...
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If I have a TextBox control with the Name Property = Textbox1, is there a way to use a variable for part of the name - like this:
Dim i as String = "1"
"TextBox" & i & ".Text" = "Hello"
I would like to refer to a control but i do not know its number but i do know that it is a ComboBox. I was told to use this
Me.Controls("ComboBox" & 1 + i).Text
Which would get the text property of the i +1 ComboBox. However when run this I get an ullReferenceException was unhandled error. What an I doing wrong?
why error "Index and length must refer to a location within the string."appear when the process of the program is going to executeNonQuery, i'm looking the error for 2 day's i still can't find it.
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In VBA from Access 2003 I was able to employ the following :Form.Controls(" in here I am able to use a string variable holding the name of the control I want to reference ").property= etc.Is this kind of thing possible in VB .netI have a listview control to which I am adding 'errors' and the tag property of each item hold a string that is the name of the control I want to set the focus to when they double click on the listview item. So I want to do something like this :<listviewitem.tag>.focus()and have the string interpreted as a control name.
View 5 Replieswhy when i upload less than 10 item the program do but more than it like 15 and above the program give me error saying "Index and length must refer to a location within the string."
here is my codes below
For Each myDatarow In tblLocal.Select("sync ='0'") '
' tblServer.ImportRow(myDatarow)
' dataimpt = myDatarow.Item(4).ToString
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the error appear when the program is going to update the 14th data... meaning from 1st to 13th data program works in the 14th it's not it gives me error "Index and length must refer to a location within the string
How can I refer to the control while I am inside a control's method in VB.NET?For example, I want in a textbox to show a message box with that textbox's text every time the text changes. The code would be something like:
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
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I have an application that dynamically creates winforms.
Dim NewS As New Form
Dim NewT as new Timer
NewT.Interval = 5000
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I am adding some controls to a panel at run-time. After I add them I need to loop through the panel in a different sub and test for a specific control. I was assuming that if I named the variable that the control is set to to "a", that I could then test for this by saying
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I have code like this which loads a control from an .ascx file, calls some methods of the control, then renders it:
Option Explicit Off
Sub renderMyControl(p As Page)
Dim ctrl as Object = p.LoadControl("path/to/myControl.ascx")
' ... do stuff with ctrl ...
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This code only works because Explicit is off. I would like to use CType to convert the control to its "strong type" (and get rid of Option Explicit Off) but I don't know how to add a reference to the type. How can I do this?
I have an application that dynamically creates winforms.
Dim NewS As New Form
Dim NewT as new Timer
NewT.Interval = 5000
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I'm looking to list all available performance counters (on a server) in my app and allow the user to select what he/she wishes to monitor. Then when they have been selected, hit a button, and the counters will start monitoring.
From using Google so far I can monitor one counter but I'm looking to monitor several user-selected counters. I guess in short I might be looking to re-hash perfmon. Would I need an array or a Microsoft.VisualBasic.Collection?
I've been trying to get some PictureBox'es to appear and disappear dynamically. Here is my code I've been trying to get to work:
Private Sub Container_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Image As New PictureBox
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Obviously, this isn't how I started out. But I've been trying everything I can to get it to actually display. If I have a PictureBox with exactly the same properties, it displays when I tell it to. This way, it doesn't. I even created an entire class and used that - nothing. I'm guessing it may be the fact that I used a Dim statement, but I'm still a teensy bit novice-y to certain aspects of VB (in particular, Image handling).
I have an application that i have developed which requires me to run a method in one of the classes on a timely basis. Basically, calling the method at an interval.I can do this if there's only a single object, but the number of objects that i have to create depends on the number of entries in a table. I was wondering if it's possible to add timer control dynamically and make the tick even call objects' methods at an interval.
View 8 RepliesI'm new to VB (and .net), just started taking an introductory class. One of the things we've done is set up a little form that does basic math. It looks something like this:
Code:
[txt1] = [txt1mod1] + [txt1mod2] [btn1]
[txt2] = [txt2mod1] - [txt2mod2] [btn2]
[txt3] = [txt3mod1] * [txt3mod2] [btn3]
[txt4] = [txt4mod1] / [txt4mod2] [btn4]
When you click btn1, it adds the values txt1mod1 and txt1mod2 and displays the answer in txt1. The same happens for buttons 2, 3, 4 on their respective lines. So the way we handle this is to have four subprocedures that handle the button clicks, one for each button. I was thinking it would make more sense to have one function handle all of the button clicks, since it's basically the same thing. Through my own research I've learned you can have multiple events call one procedure like so:
Private Sub btn1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn1.Click, btn2.Click, btn3.Click, btn4.Click
'stuff
End Sub
But how do I determine which of the four buttons was clicked, and which text box values the user cares about? Then after doing so, how do I reference the relevant controls (txt[x]mod1, txt[x]mod2, txt[x])?
Code:
Dim b As Button = CType(sender, Button)
Dim t As String = b.Tag.ToString
But it gets a little fuzzy after that because I can't figure out how to reference the controls using the tags. I don't even know if I'm going down the right path. I can, for example, set some string to
Code:
strBox1 = String.Concat("txt",t,"mod1") 'string is "txt1mod1" for example
but trying to reference the control
Code:
...strBox1.Text...
gives me errors that, "Text is not a member of String."
Well, I don't know if this is correct or not, but it seems to work if I use "Controls()":
Code:
'if t = 1
Dim a As String = Controls(String.Concat("txt",t,"mod1")).Text 'value of txt1mod1
Dim b As String = Controls(String.Concat("txt",t,"mod1")).Text 'value of txt1mod2
Dim s As Integer = CInt(a) + CInt(b) 'im actually determing the operand elsewhere
Controls(String.Concat("txt",t)).Text = s.ToString
Here is my xsl:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<html>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
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The problem is the class="pass_section" in the xsl. I need to set that value dynamically in the VB code (meaning put a run-time value in the xml to set it).
I have created two dynamic objects in my project; one being a button and the other a listview. I have added addHandlers to the button so that I can print out information from the listview. The problem is I don't know how to access the listview through the button_click Sub.[code]...
View 3 RepliesI have a UserControl.ascx which essentially outputs the Name and Email of the user currently logged in (stored in session variables, for the record) at the top of every page on my website. Said control is currently called by Site.Master using <%Html.RenderPartial("UserControl")%>.
It works fine when I log in for the first time and my details are displayed correctly, but when I log out and try to log in again something strange happens...
The Control itself tests the condition Session("auth"), which my controller sets to true upon authenticating a user and which it forces to false when the logout button is pressed. All session variables are cleared upon logging out.
(For the record, my user control used to check Request.IsAuthenticated rather than Session("auth") to determine the current Session State. The same issue arised.)
The problem is that when I try to log in as a different user, instead of showing the new user's information in the header, nothing appears beside Name: and Email: (see code below). I suspect this is because UserControl.ascx is not updating its state.
Ideally, I'd like a solution which would force UserControl to check Session variables every time a page is loaded. Is there a clean way to achieve this?
<%@ Control Language="VB" AutoEventWireup = "false" Inherits="System.Web.Mvc.ViewUserControl" %>
<%-- The following line works around an ASP.NET compiler warning --%>
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I have code that reads file paths froma text file into my application for an mru list on my apps main menu. The menuitems are added programatically from each line of the text file. How can i attach events to these menu items?
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