How to filter the date in dbase

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Dear,

I want to access dbase database and fill in DataGridView in .Net. When i tried this code with passing date value in where Claus not filtering, but without where Claus its working fine. Please help on this

Thanks
Basit

VB

Try
    Dim ConnectionString As String
    ConnectionString = "Provider=vfpoledb;Data Source=D:\ATTEND.DBF;Collating Sequence=machine;"
    Dim dBaseConnection As New System.Data.OleDb.OleDbConnection(ConnectionString)
    dBaseConnection.Open()
    Dim dataadapter As New System.Data.OleDb.OleDbDataAdapter("SELECT * FROM ATTEND.DBF Where date between #" & Format(Today.Date, "mm/dd/yy") & "# and #" & Format(Today.Date, "mm/dd/yy") & "#", dBaseConnection)
    'Dim dataadapter As New System.Data.OleDb.OleDbDataAdapter("SELECT * FROM ATTEND.DBF", dBaseConnection)
    Dim ds As New DataSet()
    dataadapter.Fill(ds, "ATTEND")
    DataGridView1.DataSource = ds
    DataGridView1.DataMember = "ATTEND"
    dBaseConnection.Close()
Catch ex As Exception

End Try

Posted 19-May-15 2:27am

basitsar

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Comments

Richard Deeming 19-May-15 10:03am

Your code is vulnerable to SQL Injection[^].

NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

2 solutions

Solution 1

The problem is that dBase/xBase doesn't support "between" for SQL dates

Try this:

Quote:
date = #" & Format(Today.Date, "mm/dd/yy") & "#

Posted 19-May-15 3:08am

Leo Chapiro

Comments

Richard Deeming 19-May-15 10:04am

You've copied the SQL Injection[^] vulnerability from the question.

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Richard Deeming · Accepted Answer · 2015-05-19T04:10:00

To fix the SQL Injection[^] vulnerability in your code, use a parameterized query:

VB.NET

Using dBaseConnection As New OleDbConnection(ConnectionString)
    Using dBaseCommand As New OleDbCommand("SELECT * FROM ATTEND.DBF Where date = ?", dBaseConnection)
        dBaseCommand.Parameters.AddWithValue("p0", DateTime.Today)
        
        Dim ds As New DataSet()
        Dim dataadapter As New OleDbDataAdapter(dBaseCommand)
        dataadapter.Fill(ds, "ATTEND")
        
        DataGridView1.DataSource = ds
        DataGridView1.DataMember = "ATTEND"
    End Using
End Using