20,899 Topics
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| | error when get the checked value of checked listbox array "Object reference not set to an instance of an object." what is the problem in my code [code=vb.net] Public Class Form1 Dim c1b1 As CheckedListBox() Private Sub btnAddItems_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim l As … |
| | cmd = New SqlCommand(sql, myConnection) reader = cmd.ExecuteReader() While reader.Read() For Columns = 0 To reader.FieldCount - 1 Category = reader.Item(Columns) 'READ COLUMN FROM DATABASE cmbfld.Items.Add(Category) ComboRow += 1 Next End While this code is populating the records instead of the field name.what can i do pls?  |
| | I have made one crystal report.In which i hv used sql server 2005 db and ms access db .It works properly but it doesn't work with vb.net. I want to know how to make connection string for both db for a single report in vb.net. |
| | Hi everyone, I have to make a program that reads a txt file after reading it, show it in a richtext box and in another tab make the average of the grades the input received sort it by the student id and then in the same rtb sort it by …  |
| | I am wanting to display the PC's System Directory in a treeview. I have been searching for how to do this for some time now without finding anything. if anybody can help me out i would greatly appreciate it. thanks |
| | Hi, In my page I have a formView with <ItemTemplate>, <EditItemTemplate> and <InsertItemTemplate>. In the <ItemTemplate> I have a linkButton "Edit" that, when clicked by the user, should show the FormView in Edit Mode. I have the following: [code=ASP.NET] <asp:LinkButton ID="EditLinkButton" Text="Edit" OnClick="EditLinkButton_Click" runat="server" /> [/code] And in the code … |
| | Yeah... the semester is on! lol but anyway, i'm trying to find a solution manual for my text and wonder where you guys get 'em? i'm a decent googler and haven't came up on anything yet. my text: Microsoft Visual Basic 2005 RELOADED: Advanced by: Richard A. Johnson/Diane Zak any … |
| | Hi expert, I'm facing a problem when i try to update the database, below is my code: Dim conn As New OleDb.OleDbConnection Dim strSQL As OleDb.OleDbCommand Dim ra As Integer Dim num conn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;" & _ "Data Source=C:\employee.mdb" conn.Open() strSQL = New OleDb.OleDbCommand("Update [emp] Set e_name = '" & … |
| | What mean that error? can someone help me? [B] The connection was not closed. The connection's current state is open[/B] [CODE]Private Sub btnCari_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCari.Click con.Open() sql = ("SELECT * FROM RekodAnggaran WHERE [NoIC]='" & txtNoIC.Text & "'") da = New OleDb.OleDbDataAdapter(sql, con) …  |
 | I just found out that project modules in visual studio can be built on separate languages e.g. VB.NET and C#.NET. This can be done by publishing the module as a dll. Q1. How do i integrate the separate modules. Q2. Is the process cumbersome? Q3. If the project is a …  |
| | why my coding find data only can find 1 data, then can't find any other data. if i want find other i need restart my vb.net.. what the problem anyone can help me please? [CODE]Private Sub btnCari_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCari.Click sql = ("SELECT * … |
| | Hi I am a new bee, I am trying to insert data into a database white the use of parameters. When I run this code I get an error message: "No value given for one or more required parameters." Any help will be appreciated conn.Open() sql = "INSERT INTO Categories(Name) … |
 | hi friends,i am using dropdownlist in gridview.i am populating it using [code] Dim dsUserRoles As DataSet = objUser.GetRoles() CType(gvUsers.Rows(gvUsers.EditIndex).FindControl("ddlRoleName"), _ DropDownList).DataSource = dsUserRoles CType(gvUsers.Rows(gvUsers.EditIndex).FindControl("ddlRoleName"), DropDownList).DataTextField = "RoleName" CType(gvUsers.Rows(gvUsers.EditIndex).FindControl("ddlRoleName"), DropDownList).DataValueField = "RoleId" CType(gvUsers.Rows(gvUsers.EditIndex).FindControl("ddlRoleName"), DropDownList).DataBind()[/code] but when iam runnig if had some no.of.cols and when i click on editlink dropdownlist is replacing … |
| | suituation: having employee perrsonel details as a database(msaccess) by selecting empno in combobox and the button(button name:showbutton) was clicked.............. question: how to retreive records in databaseand to display that record in textboxes? |
| | can someone please check my code because it doesnt update my database.. i set the room no. as the primary key.. can you please help, its urgent.. i need it tomorrow.. thanks. [CODE]Dim con As New OleDb.OleDbConnection con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Source=..\data\YayaDB.mdb" con.Open() Dim query = "UPDATE Rooms SET … |
| | Hi Friends, I am having an issue with the login form for our application. Its a windows app, developed in VB.net When the app loads, from the main form, a login screen is invoked, but the issue is , login screen looks like its having focus and the user id … |
| | I have been trying for about 3 days now trying to find a way to open multiple instances of a simple program and have had no luck. It is being used to log into a site multiple times and the web browser component uses the same cookie which is stopping … |
| | hey guys need a little help. i tried to save image into my database, it saves without error but when i tried to check if it saves in mysql, the data about my picture id save, but the image i save return a value of 0. please help me with … |
| | i got bit calculate coding.. i want make my output be double like 100.30(this is double?) the calculate data is from database. i want the result at lblPremiumJP.Text be double anyone can help me? [CODE]Private Sub cmbPremium_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbPremium.SelectedIndexChanged con.Open() sqlPremium = "SELECT … |
| | who know how to make data show at textbox from this code. from the below code, i only can check if that data got in database or not, if got it show a msgbox. but i want the all data show at text.. [B]example[/B] i search data use a NoIC … |
| | i am doing onlineeducation project.in that,how to send mails to every student from our mailserver daily at 12pm without our interaction.i am using consoleapplication in vb.net.can anyone please help me thank you in advance |
| | Hi, currently i'm able to save an image that I have draw into SQL but I would like to knw if it is possible to update new draw picture to replace the old picture? how can i modify this code in order for it to save instead of create another … |
| | hi friends,i entered some text in text box.later another one came and entering some text.at that time as intelensence my words are coming.how to clear them.i asked my sir,he said to clear the cache of textbox.but how to do it.if not understood,sorry for my language. ex:in gmail loginname,we will get … |
| | hi friends,in my project when i am clicking on the browser back button i am redirecting to-- page cannot be displayed--but i want to redirect to my login page.i am using vb.net in my project. i wrote in source file <script type="text/js" language="javascript"> history.go(1) </script> but not working |
| | Hi, I strange thing is happening in my app. I have a main form (IsMdiContainer =True) containing a gridview, which when double clicking a record opens a form in Modal state containing a TabControl. When I close down form 2 and select another record, the form opens with the new … |
| | Hi, i am now want to insert data(fault and visual(bold)) into the table. After done the calculation, i would like to insert the fault and visual value into my table summary. My field name in table summary for fault(fo_ratio) and visual(visual) So below is my coding. How can i save … |
| | Hi This is first time I use ajax controls I put script manager control and calender extender then I chosed text box and wrote in calender extender target controlID: TextBox1 but when I run I got nothing when click on textbox! |
| | hi i want to know that how to use sound like query in VB.net with access. EXAMPLE (SQL) - [code] create table names (name varchar(100)) insert into names values ('ritu') select * from names where soundex(name) =soundex('reetu') [/code] OUTPUT- [code] ritu [/code] |
| | helo..i have a problem with my system.. i have try many time and i cannot solve the problem..here is my question Use one dimensional array to solve the following problem: A company pays its salesperson on a commission basis. The salesperson receives RM200 per week, plus 9% of their gross … |
 | I had an issue getting data beck from a popup form and was assisted with a solution from Stevoni (thanks again). It has led to another problem however. In trying to send data to the popup I have over loaded the constructor to get the new data across. It appears … |
| | Hi expert, i facing a problem when i try to connect to database by using vb.net below is my code: Imports System.Data Imports System.Data.OleDb Public Class Form1 Dim dSet As New DataSet Dim da As OleDb.OleDbDataAdapter Private Sub btnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogin.Click Dim User, … |
| | I want to know that what is the MAXIMUM number of Forms that can be added in a single project in VB 6.0 and in VB.NET also. any ideas? :) |
 | Hi all! I'm developing some software for my current employer and i'm looking to incorporate an option that changes the font size across all forms for accessibility purposes. Now I have managed to make it work; however the code appears long and inefficient. My question to you guys is: Is … |
| | Hi i have to store a song in MS access database . I want the code in c sharp or vb.net |
| | Hi guys, Currently I am updating a listview with data in it via clicking on the selected row and displaying that row data onto textboxes and then updating it. What the data has is ID number follow name and QTY. What I want to add to this function is to … |
| | 1.) I have problem uploading file. it work sometime and in the other hand will not work give and error that cannot find the path 'c:/upload/' 2.) i want to upload video file i could not upload video file please could anyone help me with VB.Net coding to upload video … |
| | Hi Everyone, MY name is Philip I am a Programmer Analyst. BS in CIS. I am a mid level VB.NET programmer and MCITS Certified in SQL Server. Glad to meet everyone, PhilipJohn  |
| | Well basically, I edited my patcher/launcher application that is used with a program, and now, when I use it, I get no errors, but it appears in task bar... when I click it... nothing happens. The odd thing is that I am using Windows 7, which shows a preview when … |
| | I have a Folder on the Web Server that has files that have been uploaded by users via my Web App. I would like to create a button click event that would download the Folder (Directory) and all of its contents. Currently I have a link on a web page … |
| | [code] Dim workspace(1 To 4) As Long ' (1)=left (2)=top (3)=right (4)=bottom SystemParametersInfo &H30, 0, workspace(1), 0 ' &h30 = get workspace size Dim X As Long, Y As Long, w As Long, h As Long X = workspace(1) * Screen.TwipsPerPixelX Y = workspace(2) * Screen.TwipsPerPixelY w = workspace(3) * … |
| | Basically, what I want to do is... Have a listbox with a list of directories and the executable name in, e.g. "C:\Directory1\file.exe" "C:\Directory2\file.exe" "C:\Directory3\file.exe" And then using My.Computer.FileSystem.CopyFile(Application.ExecutablePath, [Each List Item Here], True) To copy itself to the directories I want to :) How can this be done? Thanks |
| | Hi, I am now want to retrieve only year from my table(summary),field name(dates). So i am facing the problem on how to display the year in combo Box. my sql statement as below. Thanks If i put [b]SELECT DATES[/b], that means day,month and year will display. So, what should i … |
| | Hi Professionals, I found these tutorials and codes regarding 'Retrieve E-Mail Through POP3' on an e-book entitled 'Microsoft Visual Basic .NET Programmer's Cookbook'. I understand what each functions/codes are but how do i design the GUI/interface to fit the codes? Please advise. Thank you in advance. Best Regards, Md Azmil … |
| | hey =) I'm working on a vb.net application. One of the forms has a few tabs, each having multiple text boxes in it. Because I have so many text boxes, I'm sort of limited when it comes to their size, while I'm allowing the user to enter up to 4000 … |
| | I have a DLL that copies an Access database, opens it, reads it, and then closes it. The second time through it is unable to copy the Access DB because the EXE has an open handle to it. The EXE does not reference the Access DB at all, it just … |
| | Pls see my code.Nothing is displaying in the grid [code]Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim connString As String = "Provider=SQLOLEDB;Data Source=MSALAMEEN;uid=sa;pwd=Sa1;Initial Catalog=Biometric" Dim myConnection As OleDbConnection = New OleDbConnection myConnection.ConnectionString = connString Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select ID from bdata", myConnection) … |
| | How does one backup an Oracle database? which files do I backup? and which recovery Procedure I use? |
| | Hai, I don know how to store data from datagrid to SQL database. I also don know how to find the number of records in dataset or datareader. for an example [B]myCommand = New SqlCommand("Select * from discounts", myConnection) dr = myCommand.ExecuteReader()[/B] How can I know whether there is any … |
| | Is it possible to disable tabcontrols and enable tabpages |
| | Hello good people of vb.net, I'm experiencing problems with an application I'm writing. I have a login dialog that is loaded in the main form's load property, like this: [CODE] Private Sub FrmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ' show login if configured If My.Settings.login Then … |
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