I am using Access 2013 as database in Visual studio 2017. The database is connected and all but when i run this code:
myConnToAccess = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\Database11.accdb")
myConnToAccess.Open()
ds = New DataSet
tables = ds.Tables
da = New OleDbDataAdapter("SELECT Typ záznamu from Typ", myConnToAccess)
da.Fill(ds, "Typ")
Dim view1 As New DataView(tables(0))
With ComboBox1
.DataSource = ds.Tables("Typ")
.DisplayMember = "Typ záznamu"
.ValueMember = "Typ záznamu"
.SelectedIndex = 0
.AutoCompleteMode = AutoCompleteMode.SuggestAppend
.AutoCompleteSource = AutoCompleteSource.ListItems
End With
I get the **System.Data.OleDb.OleDbException: 'Syntax error (missing operator) in query expression 'Typ záznamu'.'
**
I have the
Dim mySQLCommand As OleDbCommand
Dim mySQLStrg As String
Dim ds As DataSet
Dim da As OleDbDataAdapter
Dim tables As DataTableCollection
Dim myConnToAccess As OleDbConnection
in the begining of the class... also the:
Imports System.Data.OleDb
I dont know what to d any more... can someone please help me?
If you want to query the column Typ záznamu then you need to put it in square brackets because of the space between the words.
da = New OleDbDataAdapter("SELECT [Typ záznamu] from Typ", myConnToAccess)
I had made it work:
this line:
da = New OleDbDataAdapter("SELECT Typ záznamu from Typ", myConnToAccess)
needs to look like this:
da = New OleDbDataAdapter("SELECT [Typ záznamu] from Typ", myConnToAccess)
The only difereance is in the column name. it needs to be in squere breaces or how do you call it [ ]
Related
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select sum[Shark Individual Weight] from FishCaught'", myConnection)
Dim ds As DataTable = New DataTable()
da.Fill(ds)
DataGridView1.DataSource = ds
myConnection.Close()
Hello. I am using vb.net connecting to ms access. I keep getting error 'missing operator in query expression'. I would like to know what's wrong with my sql statement.
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select Sum([Shark Individual Weight]) From FishCaught Where ([OperationID]) = '" & TextBoxOpID4.Text & "'", myConnection)
Dim ds As DataTable = New DataTable()
da.Fill(ds)
DataGridView2.DataSource = ds
I think my SQL syntax is wrong. How should write it actually? I get this error 'Data type mismatch in criteria expression'. If i just write ' Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select Sum([Shark Individual Weight]) From FishCaught', the sum will be display. So i think there's error in WHERE clause. Any help would be appreciated, thank you.
Sum is a function and you have a disturbing single quote, thus:
"Select Sum([Shark Individual Weight]) From FishCaught"
this is your code
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select sum[Shark Individual Weight] from FishCaught'", myConnection)
Dim ds As DataTable = New DataTable()
da.Fill(ds)
DataGridView1.DataSource = ds
myConnection.Close()
Supposed to be the code must be like this
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select sum(The_Name_Of_The_Field) from FishCaught'", myConnection)
Dim ds As DataTable = New DataTable()
da.Fill(ds)
DataGridView1.DataSource = ds
myConnection.Close()
Is that so, try this FINAL
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select sum(Shark__Individual_Weight) as FishWeight from FishCaught'", myConnection)
Dim ds As DataTable = New DataTable()
da.Fill(ds)
DataGridView1.DataSource = ds
myConnection.Close()
Try to change Shark Individual Weight to Shark_Individual_Weight it will work
"Select Sum([field name]) From FishCaught" should work. Have you checked the field name in database, it should not contain any space. To make field name more readable you can replace any spaces with "_".
I am using VB.Net connecting to MS Access database. I think SQL syntax is wrong because before i add WHERE clause, it works. When i add WHERE clause, i got error ' data type mismatch in criteria expression'. Any help would be appreciated, thank you.
Here is my code
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select Sum([Shark Individual Weight]) From FishCaught Where [OperationID] ='" & TextBoxOpID4.Text & "'", myConnection)
Dim ds As DataTable = New DataTable()
da.Fill(ds)
DataGridView2.DataSource = ds
Additional info: textboxOpID4 is enabled false
make something like this
Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select Sum([Shark Individual Weight]) From FishCaught Where [OperationID] =" & TextBoxOpID4.Text , myConnection)
Dim ds As DataTable = New DataTable()
da.Fill(ds)
DataGridView2.DataSource = ds
I quite use this kind of query when the where clause is a number because if you do put ' in a number column the output would be string which produces the error for example the ColumnID = 5 your code is like this ColumnID = '5' which is wrong especially if it is an AutoNumber field so do not insert a datatype number inside ' so it will not become a string
I have a DataGridView which displays the contents of a table (with sql query). But whenever I run the code, it displays this error:
No value given for one or more required parameters.
Where did it went wrong? The program ran without displaying any errors.
Here's the code for displaying in the DataGridView:
Dim connString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\BSPDatabase.accdb"
MyConn = New OleDbConnection
MyConn.ConnectionString = connString
ds = New DataSet
tables = ds.Tables
da = New OleDbDataAdapter("Select * from [Transactions] where transMonth=" & monthCombobox.Text & "", MyConn)
da.Fill(ds, "BSPDatabase") 'Change items to your database name
Dim view As New DataView(tables(0))
source1.DataSource = view
TransactionsDataGridView.DataSource = view
I think you are forming bad SQL. The value needs to be in quotes.
da = New OleDbDataAdapter(String.Format("Select * from [Transactions] where transMonth ='{0}'", monthCombobox.text), MyConn)
I have the following code:
Using conn = New SqlConnection(connStr)
Dim sql = "SELECT [CATEGORIA], [AREA] FROM [CATEGORIAS] WHERE ([AREA] = #AREA)"
Dim sqlCmd = New SqlCommand(sql, conn)
sqlCmd.Parameters.AddWithValue("#AREA", CStr(PublicLogin.Area))
conn.Open()
Dim ds As New DataSet
Dim da As New SqlDataAdapter(sql, conn)
da.Fill(ds, "CATEGORIAS")
With cboCat
.DataSource = ds.Tables("CATEGORIAS")
.DisplayMember = "CATEGORIAS_AREA"
.ValueMember = "CATEGORIAS_AREA"
.SelectedIndex = 0
End With
End Using
It should in theory fill the combo box right? It doesn't. It doesn't give me any errors or anything; the combo box just sits there empty. I am pretty sure the query is working well and its grabbing the correct info but the Combobox doesn't fill. If I take the where query out it fills the CB with 'System.Data.Row...'
UPDATE: Working code in case someone needs it;
Using conn = New SqlConnection(connStr)
Dim sql = "SELECT [CATEGORIA], [AREA] FROM [CATEGORIAS] WHERE ([AREA] = #AREA)"
Dim sqlCmd = New SqlCommand(sql, conn)
sqlCmd.Parameters.AddWithValue("#AREA", CStr(PublicLogin.Area))
conn.Open()
Dim ds As New DataSet
Dim da As New SqlDataAdapter(sqlCmd)
da.Fill(ds, "CATEGORIAS")
With cboCat
.DataSource = ds.Tables("CATEGORIAS")
.DisplayMember = "CATEGORIA"
.ValueMember = "CATEGORIA"
.SelectedIndex = 0
End With
End Using
Its empty because probably the query returns nothing. Notice that you are not adding the parameter to the final query on the sql variable.
You create a command with the query and the parameter but you never use it, so when you select all the values WHERE ([AREA] = #AREA) it returns nothing.
Try this:
Dim da As New SqlDataAdapter(sqlCmd)
This looks odd to me:
.DisplayMember = "CATEGORIAS_AREA"
.ValueMember = "CATEGORIAS_AREA"
It should probably be something like this:
.DisplayMember = "CATEGORIA"
.ValueMember = "AREA"
From MSDN on DisplayMember:
Gets or sets a string that specifies the property or column from which to retrieve strings for display in the combo boxes.
EDIT: You also need to replace this:
Dim da As New SqlDataAdapter(sql, conn)
with this:
Dim da As New SqlDataAdapter(sqlCmd)
Otherwise your parameters are never used.
I have a DataGridView on windows Form, just draged and droped from tools.
Now I want to set data to this gridview using DataSet or DataTable. How can set it by coding.
I am using SQL Server 2008 and VS 2010
Please Help me....
here's a quick example:
Dim DS As New DataSet()
Dim DA As New SqlDataAdapter()
Dim SelectQ as String = Query
Dim CN As New SqlConnection(ConnectionString)
DA.SelectCommand = New SqlClient.SqlCommand(SelectQ)
DACustomers.SelectCommand.Connection = CN
CN.Open
DA.fill(DS, "diseredTable")
CN.Close
Dim BS As New BindingSource
BS.DataSource = DS
BS.DataMember = ”desiredTable”
DataGridView1.DataSource = BS