Error with searching between two dates on mschart - vb.net

Question

I have a problem with MSchart control. I have 2 fields on my database for date and time.
When I connect to my database and load X and Y values to my chart, there is no problem, but when i use search between 2 date in my query then mschart loads nothing. I'm using Text format for inDate1 and inTime1, here is my code:
Dim con As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + excel
Dim query As String = "SELECT inDate1,inTime1 FROM loginlog where personID=" + TextBox1.Text+" and inDate1 between "+ TextBox2.Text " and " + TextBox3.Text
Dim mycon As New OleDbConnection(con)
Dim command As New OleDbCommand(query, mycon)
mycon.Open()
chart1.DataSource = command.ExecuteReader()
chart1.Series(0).XValueMember = "inDate1"
chart1.Series(0).YValueType = ChartValueType.Time
chart1.Series(0).YValueMembers = "inTime1"
chart1.DataBind()
mycon.Close()

Answer 1

You really do not want to use text for dates. Instead, convert them to DateTimes (e.g. with DateTime.TryParse) and pass them as SQL parameters.The remark about passing as an SQL parameter applies to all parameters, including the personID.
So, your code could look something like:
Dim startDate As DateTime
Dim endDate As DateTime
If Not DateTime.TryParse(TextBox2.Text, startDate) Then
' there was an error parsing - do something useful
startDate = New DateTime(2000, 1, 1)
End If
If Not DateTime.TryParse(TextBox3.Text, endDate) Then
' there was an error parsing - do something useful
endDate = New DateTime(2100, 12, 31)
Else
' add a day to include it in the range selected in the SQL query
endDate = endDate.AddDays(1)
End If
Dim query As String = "SELECT inDate1, inTime1 FROM loginlog WHERE personID = #PersonID AND inDate1 BETWEEN #StartDate AND #EndDate"
Dim mycon As New OleDbConnection(con)
Dim command As New OleDbCommand(query, mycon)
command.Parameters.Add(New OleDbParameter With {.ParameterName = "#PersonID", .OleDbType = OleDbType.VarWChar, .Value = TextBox1.Text})
command.Parameters.Add(New OleDbParameter With {.ParameterName = "#StartDate", .OleDbType = OleDbType.Date, .Value = startDate})
command.Parameters.Add(New OleDbParameter With {.ParameterName = "#EndDate", .OleDbType = OleDbType.Date, .Value = endDate})
' now execute the query...