Sql Server - Unable To Display SQL Database Data On VB Form?
Sep 26, 2011
I am facing a problem displaying the records of my table on the visual basic form I have created.
This is my code :
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
myconnection = New SqlConnection("server=HOME-PCSQLEXPRESS;uid=sa;pwd=123;database=college")
[Code]....
Note: my database name is "college" , table name is "demo3" . Table contains 2 columns namely name and roll no. How to display the data in those columns on the visual basic form that I have created ?
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Oct 23, 2011
why i am unable to display datas from database.
If mConnection Is Nothing Then mConnection = New Odbc.OdbcConnection
' check if the connection is already open
If mConnection.State = ConnectionState.Open Then mConnection.Close()
[Code].....
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Dec 8, 2009
The main problem is I couldn't display the result when I retrieve data from database.
1. On Picture 1 above, for the Dg_Details, I set the Columns in two type, textbox and checkbox. But, for the datagridview1, I didn't set anything.So, when I bind data from database to Dg_Details and datagridview1, the datagridview1 display the data from database, but the Dg_Details doesn't display the data. Below is the code I written in my form :
Try
objCommand = Me.MyConnection_F.open.CreateCommand
objCommand.CommandText = "select Reg_Num, Reg, Golf, Course_1, Course_2, Course_3, Course_4, Course_5 from Invoice_Reg where Receipt_No = '00001'"[code].....
I think that's happen because the Dg_Details already set and it blocked the result data from database.
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Jan 14, 2009
I am using the tutorial posted here for my database testing. I have gotten it to display the data using a messagebox but it just goes through them 1 by one. I want it to display all the data from the database in a table on my form.
Using connection As New SqlClient.SqlConnection("Server=71.200.87.112MySQLExpress; Database=database_test;User ID=sa;Password=greddy6;Trusted_Connection=False;")[cod
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Jul 8, 2009
I am working on a project. Part of my project requires me to capture data, for example, email address, from certain rows/columns of a datagridview(form2.vb) and displays them in a textbox on another windows form(form1.vb) with a click of a button(Add Contact button). The problem is the datagridview on my form must be able to display databases by making a connection to Microsoft SQL Server 2005 but so far, i have not been able to do that. I have seen many codes with regards to my problem but i do not know how to implement it.
Below are my codes that i have written so far. My program's limitations are not being able to display databases from Microsoft SQL Server 2005 so i created the statement below to add columns and test my codes.
DataGridView1.Columns.Add("CustName", "CustName")
DataGridView1.Columns.Add("Email", "Email")
[Code]...
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Sep 6, 2010
I have a program in which I want to have the user enter two percentages and display the data matching the criteria on a new form. The query would be:
Select *
From Corrosion
Where corrpct1 >= {column in database} OR
corrpct2 >= {column in database}
The way I currently have it written is to display only one row of data. I need to display any number of rows that meet this criteria. My current code is:
Private Sub btnDetails_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDetails.Click
Dim form As New frmDetails()
Me.Hide()
[code]....
1. How can I do my query to incorporate the user entered criteria (in the where statement)?
2. How can I display ALL of the data instead of just one line?
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Jun 6, 2011
i'm doing a searching form, here is my code
Dim con As New OleDbConnection
Dim cmd As New OleDbCommand
Dim rd As OleDbDataReader
[Code]....
then after that i'm double click the 1 of the row in listview and 1 form popup with all data in database.
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Jun 12, 2009
i'm trying to make a login form connected to an sql server database. my data base has records like this:
fname - lname - minit
each name in a separate column, and i wanted to use the name as the login username, so in the dataset designer i made a new column and concatenated the names together like this: lname+fname+minit but at Dim dr As SqlDataReader = cmd.ExecuteReader i get this error:
"Invalid column name 'username'. Invalid column name 'username'."
i'm asuming that's because username doesn't actually exists in the database, only in the dataset.is there a way to get that to work with out the username column actually existing in the database?
Imports System.Data.SqlClient
Public Class LoginForm
Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
[code]....
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Feb 18, 2011
I am trying to make a copy of an existing database, I use .net framework data provider for SQL Server.I get error "Unable to connect to source server for Transfer" when it runs to oPackage.Execute().
oConnection = oPackage.Connections.New("what the providerID should be?")
oStep = oPackage.Steps.New
oTask = oPackage.Tasks.New("DTSTransferObjectsTask")[code]......
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Jun 6, 2009
First off this isn't a homework assignment I am doing, I'm making a customer database program for my husband.The problem I am having is that I need to be able to access a database without the need of an sql server.
[Code]...
it is a GUI application, and the only book i have on the subject deals mostly with console applications. I also added the data source to the project in visual studio. please tell me what I am doing wrong and how to correct it?
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Feb 7, 2012
I have a form1 with a splitcontainer. I have put a button on the left panel, whenever user click the button, form2 will be displayed in the right panel.The question now is, i am not allowed to highlight the textbox in form2 with mouse. But i still can use the keyboard to highlight.
1) Replace textbox with richtextbox
2) set formborderstyle to Windows.Forms.FormBorderStyle.None.
The code i am using to open the form in panel:
B_frmMaintain.TopLevel = False
Me.scMain.Panel2.Controls.Add(B_frmMaintain)
B_frmMaintain.Show()
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Sep 17, 2010
I got a system which i want to insert, delete, update the data into my database and the data from database will be display using datagrid. The below is the coding for one of my button, delete.
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Try
btnSearchEmpNo.Enabled = False[code].....
Now I wanna set when user click on this button to delete a employee (for example) then the datagrid that i have in my application will not show the data of the deleted employee but in the background, the employee haven't been deleted from database.The employee only will be deleted from database when the user click on SAVE button.I know this application have to use RowState but how?
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Nov 7, 2010
check the VB behind code for any syntax errors.
Unable to add new rows of data to a database using the DataGrid control.
Compilation Error message is located at [URL] View snap shot images of each line error at [URL]
The VB code behind reads (revision 1.3):
</script>
<body style="font: 10pt verdana">
<form runat="server">
[Code].....
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Feb 24, 2011
I am using SQLite.When I try to insert data into the tables I get the following:Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.I am using ADO.NET 2.0 Provider for SQLite?
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May 13, 2011
I'm sure that I'm missing something really basic here, but I'm just not seeing it. I have the following
Public Sub InsertRow()
Dim employeenumber As String = employeeListBox.SelectedValue
Dim headsetnumber As String = headsetnumberText.Text
[code]....
and when I put a break point on the command.ExecuteNonQuery line, and then step through that, I'm never displayed the thankyouLabel.Text nor is my data being inserted into the database.
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Mar 13, 2012
I need a simple program which add,edit,save,delete data from database in vb.net. I have tried dataset or sqlcommandbuilder but both are not working. look at my code I have used with sqlcommandbuilder, it is not saving anything in database. provide simplest method to save data in database from dataset or direct from textbox. In this vb.net is not showing any error but not saving
'set up a connection string'
Dim connectionstring As String
connectionstring = "Data Source=|DataDirectory|inventorymanage.sdf;Password='XXX'"
Dim sqlquery As String = "SELECT * FROM ledger"
[Code].....
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Apr 11, 2010
I created a database in access 2007, linked it to my project in visual studio 2008 (vb). When I enter some data using the UI, it does not save it in the database, and it's gone as soon as I run the program again. I dragged the textboxes from the datasource panel, onto the UI..
this is the code that was automatically generated by vs for the save button:
Private Sub StaffBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles StaffBindingNavigatorSaveItem.Click
Me.Validate()
Me.StaffBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.GartisDataSet)
End Sub
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Feb 28, 2010
i have a app in visual basic mobile 2008, so i finish but now i need to tranfer the data generate in the in the app mobile to data base in sql server 2008.
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Mar 12, 2011
I am unable to fill data in the OleDbDataAdapter I get an OleDbException with the following message Syntax error in FROM clause.at this line adapter.Fill(dataset, "User")
Here is the code
Imports System.Data.OleDb
Public Class Form1
Public connection As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:MyDatabase.mdb;Persist Security Info=False")
[code]....
and also I have tried
Dim adapter As New OleDbDataAdapter
adapter.SelectCommand = New OleDbCommand("select * from user;", connection)
Dim dataset As New DataSet
adapter.Fill(dataset)
But I get the same exception Syntax error in FROM clause
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Aug 16, 2009
i m unable to update data into my database in vb 2008. the changes are reflected in the dataset but they are not reflected in database. i have set the datasource's copy to output property to copy if new but it is still not working.
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Jan 27, 2012
Here is the code for the loading the combobox. I want to load the combobox with the Name of client. so that user can select the Name and then the details which are associated with that ClientName are to be displayed in the desired textboxes.
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Mar 9, 2010
i need to upload and display images to and from database. i have written this code for uploading and it uploads fine. except 1 problem. It crashes when i dont select an image. can someone help me fix it for null value? also how do you display an image in IE?
code for inserting image -
Dim imageInfo As FileInfo = Nothing
Dim data() As Byte = Nothing
imageInfo = New FileInfo(Me.UploadLogo.Value.Trim())
Dim imagestream As FileStream = New FileStream(imageInfo.ToString, FileMode.Open)
[code]....
this works fine only if an image is selected, crashes for NULL values.
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Dec 7, 2009
I'm currently attempting to save data inputed into a data grid clicking the "save" button. My problem is, I also have another DB opened in the same window that also needs to be saved. The second database is pulled up by the contents of a text box, so there for it has no real Dataset to call on. It looks something like this.
[Code]...
I try to run the update command it always throws the exception "Cannot find table 0" or "Update unable to find TableMapping['Table'] or DataTable 'Table'." I tried declaring the connection the same way as the code above and then simply calling the da.update(ds) but it wouldn't do anything.
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Mar 11, 2010
I have two forms which are being displayed from the MDI Parent form. In the following code I would like to send data from form 1 to form 2.
DsgnForm.InsertOE = txtOrderEntry.Text
DsgnForm.InsertFN = txtFirstName.Text
DsgnForm.InsertLN = txtLastName.Text
DsgnForm.InsertAD = TxtAddress.Text
My problem is when the second form is opened the variables are empty.How can I send data to the second form.
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Mar 7, 2010
Note: Combobox contains company name, then when i select one of the company in the list, the information on the table connected to to the company table like purchase order table info will appear on the datagridview.
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Oct 1, 2011
We are doing a project using VB2010 as front end SQL server 2008R2 as backend.We need the code to display all the images in thumbnail view in VB when we open a database table.
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Mar 18, 2011
I have to write a code in vb.net (2010).To get a data from Database A table 1 and dump it to Database B Table 2.What's the best way to do this? Most efficient way? I know I can do this very easily in sql management studio but I need to write a code to do this in vb.net.
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May 22, 2009
I have just started with vb and would like to know if there is a way to input several boxes of data on one form and display individual pieces of that data on several other forms at timed events in the future?
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Sep 30, 2011
I am writing a custom application for IMAIl express 11.5 using IMAIl Server API for .Net
I am using the following code:
Dim DomData As New DomainData()
DomData.Aliases = "TestALias"
[code].....
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Sep 1, 2009
i am trying to make a search form . i want to display the data saved in sql server in a grid view upon hiting the search button . below is the code which i am using but i am getting an error > Conversion failed when converting the varchar value 'anees' to data type int.
[code]...
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