Datagridview save changes to Database vb.net

Question

Hello i\'ve a databse that i load to Datagridview in vb.net application. it loads fine, however when i try to save the date it doesn\'t work. here is the code

Answer 1

My VB.NET code for the 4 type of databases (update information from DataGridView to Database)

Private Sub sqldb_savedata()
    Dim connectionString As String = "Server='" & sql_server & "';Database='" & sql_database & "';User Id='" & sql_user & "';Password='" & sql_pass & "'"
    Dim sqlCon = New SqlConnection(connectionString)
    If (sqlCon.State = ConnectionState.Closed) Then sqlCon.Open()
    Dim SQLAdapter = New SqlDataAdapter("SELECT * FROM clinics", sqlCon)
    Dim SQLDataSet As New DataSet
    Dim myTable = DataGridViewClinic.DataSource
    Dim cmdbuilder As New SqlCommandBuilder(SQLAdapter)
    SQLAdapter.Update(myTable, "clinics")
    MsgBox("Updated!", MsgBoxStyle.OkOnly, "")
End Sub

Private Sub mysqldb_savedata()
    Dim connectionString As String = "Server='" & mysql_server & "';Database='" & mysql_database & "';User Id='" & mysql_user & "';Password='" & mysql_pass & "'"
    Dim sqlCon = New MySqlConnection(connectionString)
    If (sqlCon.State = ConnectionState.Closed) Then sqlCon.Open()
    Dim SQLAdapter = New MySqlDataAdapter("SELECT * FROM clinics", sqlCon)
    Dim SQLDataSet As New DataSet
    Dim myTable = DataGridViewClinic.DataSource
    Dim cmdbuilder As New MySqlCommandBuilder(SQLAdapter)
    SQLAdapter.Update(myTable, "clinics")
    MsgBox("Updated!", MsgBoxStyle.OkOnly, "")
End Sub

Private Sub firebirddb_savedata()
    Dim connectionString As String = "Database='" & firebird_server & "';User=SYSDBA;Password=masterkey;Dialect=3;ServerType=1"
    Dim sqlCon = New FirebirdSql.Data.FirebirdClient.FbConnection(connectionString)
    If (sqlCon.State = ConnectionState.Closed) Then sqlCon.Open()
    Dim SQLAdapter = New FirebirdSql.Data.FirebirdClient.FbDataAdapter("SELECT * FROM clinics", sqlCon)
    Dim SQLDataSet As New DataSet
    Dim myTable = DataGridViewClinic.DataSource
    Dim cmdbuilder As New FirebirdClient.FbCommandBuilder(SQLAdapter)
    SQLAdapter.Update(myTable, "clinics")
    MsgBox("Updated!", MsgBoxStyle.OkOnly, "")
End Sub

 Private Sub localdb_savedata()
    DBconn = New SqlCeConnection("Data Source=Data Source=|DataDirectory|\Database.sdf")
    If (DBconn.State = ConnectionState.Closed) Then DBconn.Open()
    Dim SQLAdapter = New SqlCeDataAdapter("SELECT * FROM clinics", DBconn)
    Dim SQLDataSet As New DataSet
    Dim myTable = DataGridViewClinic.DataSource
    Dim cmdbuilder As New SqlCeCommandBuilder(SQLAdapter)
    SQLAdapter.Update(myTable, "clinics")
    MsgBox("Updated!", MsgBoxStyle.OkOnly, "")
End Sub

Answer 2

So you must define an InsertCommand for you DataAdapter

Side-note: The line DSet.AcceptChanges() is redundant since the previous line Dadapter.Update will call AcceptChanges implicitely.

You should use using-statement for anything implementing IDisposable like a Connection. That would call Dispose(which closes the connection) implicitely even in case of an exception.

So replace:

con.Open()
Dadapter.Update(DSet, "Table1")
DSet.AcceptChanges()
con.Close()

with

Using con =  New OleDbConnection(myConString)
    con .Open()
    Dadapter.Update(DSet, "Table1")
End Using

Answer 3

You need to read back the dataset from the datagrid

con.Open()
DSet = DataGridView1.DataSource  '<<<<<<<<<<<<<<<<<<<<<<<
Dadapter.Update(DSet, "Table1")
DSet.AcceptChanges()
con.Close()