20,278 Topics
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| | Good day to everyone:) , i'm a new user here and i'm also new to Visual Basic , i'm having problems coding the codes myself. It's an assignment for me from school , after attemtping it for a few hours , I'm almost finish but i'm having trouble in the … |
| | I am reading a text file line by line using StreamReader.Readline(). After reading a line i have to check whether some fields of the line which is read are present in the rest of the file or not. What i am doing is that after reading a line from the … |
| | Can anyone help me with this syntax.. i made 3 forms. and i want form 1 & 2 inputs displayed in form 3.. this is what i made so far.. don't know what to do next Form 1 [CODE]Public Class Form1 Inherits System.Windows.Forms.Form Dim ID, sname, course1, year1 As String … |
 | Hi, i am writing a mobile application to save some task. In this application i want save the data of task to the text file(*.txt). however, i faced some of the issues that i unable to save data to txt file due to the runtime error on file not exist …  |
| | [B]ERROR RECEIVED:[/B] [B][COLOR="Red"]NullReferenceException was unhandled [/COLOR][/B] Object reference not set to an instance of an object. And it points on the particular line: [B][I]dsNewRow = ds.Tables("Employees").NewRow()[/I][/B] [CODE]Imports System.Data.OleDb Public Class Register Public cn As New OleDbConnection Public rd As OleDbDataReader Public da As New OleDbDataAdapter Public ds As New DataSet … |
| | Hi I want to populate a text box from a stored table I have this for the data With DropDownList1 .DataSource = ds.Tables("property") .DisplayMember = "propRef" .ValueMember = "propRef" .SelectedIndex = 0 End With "property" holds all the info from the db when the user changes the dropdown list I …  |
| | How can I sort label names on buttons within a form. Automatically sort the names and put into the correct place within the form. A-Z order sort can be left to right. Want some sensibility to the form not all mixed up. |
 | Hi, Please could you help me resolve the error message below by pointing me in the appropriate direction. The frustrating thing is that whilst the error code points to a Stack-Overflow I can not pin the offending code down because the software works faultlessly on some computers after deployment but … |
| | Hi, I am having problems when generating a chart dynamically. The problem is that sometimes the chart is rendered with a black background and sometimes without. I have stepped through the code and verifies each number and there are no anomalies or numbers that might cause a problem. The y … |
| | How to use Treeview using WPF in vb.net Treeview has to load data from database. Plz help me I was strucked from so many days  |
| | Hi guys, I'm finding myself in a little trouble. I've tried to google this problem, but without much success. Hopefully its something simple I'm missing and someone will be able to help me. I'm writing a little program that will synchronize two access database schema's. It works, to a point. … |
| | Hello, I am trying to program my page so that when a user clicks on a column heading of a gridview, the data is sorted either in ascending or descending order. So far, I have done it so that the gridview can be sorted: [CODE] <asp:GridView ID="GridView1" runat="server" Height="143px" AllowSorting="true" … |
 | Good day. I would just like to ask. if there is any way to uninstall program or uninstall program from add/remove using vb.net codes? Thank you very much. |
| | I don't know how to insert image into column header of listview |
| | I have 3 microsoft access databases all with exactly the same structure called Nimdas,Nimdas1 and Nimdas2. I can work on Nimdas in a program that I have written in VB2008. Now I want to flit from one to the other 'on the fly' using the same program. How do I … |
| | I am trying to populate an ArrayList using the elements from a DataTable. I know I could do this using Loop, but I am trying to figure out how to using AddRange. Here's my code: [CODE]SomeArrayList.AddRange(SomeDataTable.Rows.Item(0).ItemArray)[/CODE] The problem is that I can pass the collection except for the Zeroth element. …  |
| | I am rather new here and have already a good (I hope so) question. I work with an access mdb When I run the program with the following code it gives an error “Nullreference exception unhandled” “the object… is not for an example of an object…” (very free translated but … |
| | Hello everyone! I have a code below to get a specific file from my computer into the vb.net application I am developing. Is there anyone who knows how to change the path? What if I will try to put the application on a different computer? Or rather getting a music … |
| | Hey guyz Is this possible to get text automatically in textbox1 whenever any textbox is copied to the clipboard. I am talking to get it automaticaly. So if i copies abc then textbox1 value will be abc automatically (Not by clicking any button or form loading) |
| | How can I get all the data in dropdownlist? For specific data, I encode: Dropdownlist.selecteditem.text. But how can I get all the data? Thanks in advance. |
| | How do I search for a document from within my visual studio program. ie: looking for checklists by name or part of name and then be able to open the found document / file from the found search. comp - could return compactor / compressor etc.. then be able to … |
| | hi!, i have MDI form(Form1) which contain some toolstripmenu item. for example menu_101. if i do "Form1.menu_101.enabled=True" its working fine. my problem is i have a string variable like "menuname" which contain like menuname=menu_101 i need to enable or disable using this string variable like "Form1.menuname.enabled=True" please anyone knows let … |
| | How can visible a button only when a check box of a Data Grid View is checked???? |
| | Now i have some images and i have a database (MS Access) i need to convert all images to !one byte array!(couse i have 1 column for images) and i save this array. Then when i need a picture i should take some pic on this byte array. umm i … |
 | how can I edit the windows registry using vb.net |
| | hi I need to code a tool repaire exe file how I can write this reg key [HKEY_CLASSES_ROOT\exefile\shell\runas\command] @="\"%1\" %*" "IsolatedCommand"="\"%1\" %*" thank you |
| | Hello i have a problem. I have a program which is supposed to download a file in a seperate thread, while the program checks file size. However i get this error when i try to debug (F5): Object reference not set to an instance of an object. Code: [url]http://pastebin.com/7QkyJYf7[/url] |
| | Guys, why can't I find a property for my richtextbox for centering its text? A textbox has a property named "TextAlign" while in richtextbox, there is none. How do I center the text in my richtextbox? |
 | does anyone knows how to program using vb.net with rs232 module?, all i know is that i should use a compolet, but i can't understand a thing regarding the sending and receiving bit data to the machine.. I use CJCOMPOLET from OMRON |
| | Hello everyone. I have been struggling with my programming class from day one. I still can't seem to grasp the complete logic on how to write code. Anyhow, I have an assignment due that I am stuck on. Here is the assignment: In this exercise, you code an application that … |
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