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Thread: [RESOLVED] Problems with the DataGridView!!!

  1. #1

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    Resolved [RESOLVED] Problems with the DataGridView!!!

    I want to fetch some data from the database to the DataGridView,so i did this code:
    Code:
    Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Etech.mdb"
            Dim myConnection As OleDbConnection = New OleDbConnection
            myConnection.ConnectionString = connString
            Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,CreditCardNo,Notes from MLoan", myConnection)
            Dim ds As DataSet = New DataSet
            DataGridView1.Columns(0).DataPropertyName = "LAcNo"
            DataGridView1.Columns(1).DataPropertyName = "IssuerName"
            DataGridView1.Columns(2).DataPropertyName = "Creditor"
            DataGridView1.Columns(3).DataPropertyName = "Amount"
            DataGridView1.Columns(4).DataPropertyName = "ROI"
            DataGridView1.Columns(5).DataPropertyName = "EMIAmount"
            DataGridView1.Columns(6).DataPropertyName = "BankAcNo"
            DataGridView1.Columns(7).DataPropertyName = "CreditCardNo"
            DataGridView1.Columns(8).DataPropertyName = "Notes"
            da.Fill(ds, "MLoan")
            Dim dt As New DataTable
            da.Fill(dt)
            DataGridView1.DataSource = dt
    Now in the select statement i want to apply a condition that select only those rows from the database where ReminderDate=TodayDate

    The date format in my access database is like this:
    Attachment 73017
    but i cant build up the select statement.....the select statement that i gave above,what will be the where portion then?
    ReminderDate=Today.Date will wont work i wish;then what will be the where portion in my select query?
    Last edited by gautamshaw; Feb 21st, 2010 at 01:21 PM.

  2. #2

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    Re: Problems with the DataGridView!!!

    ReminderDate is a column present in my database......
    I dont want to show that column in the DataGridView......with the help of that ReminderDate of the database i want to fetch only those columns where the ReminderDate matches the today date.......
    How to modify the select query?

  3. #3
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    Re: Problems with the DataGridView!!!

    Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,CreditCardNo,Notes from MLoan WHERE ReminderDate BETWEEN CAST(CONVERT(GetDate(), VARCHAR(24),101) + '00:00:00' AS DATETIME) AND CAST(CONVERT(GetDate(), VARCHAR(24),101) + '23:59:59' AS DATETIME)

    That should do it. The only funny business is so that the entire day is covered (12am - 11:59 am).

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    Unhappy Re: Problems with the DataGridView!!!

    I get this exception:
    Attachment 73020
    Last edited by gautamshaw; Feb 21st, 2010 at 01:21 PM.

  5. #5
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    Re: Problems with the DataGridView!!!

    Maybe Access doesn't have GetDate() I was thinking SQL.

    Try switching GetDate to Now. Actually I'm not sure it has CAST or CONVERT either.

    Maybe try this (Sorry my Access is way rusty)
    Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,CreditCardNo,Notes from MLoan WHERE ReminderDate = DATEVALUE(Now())

  6. #6

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    Re: Problems with the DataGridView!!!

    This time no rows are selected.....

    Any alternative solution?

  7. #7
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    Re: Problems with the DataGridView!!!

    I'm too rusty on Access. The problem is most likely time. You should use a BETWEEN but I don't know if you can concat time onto a date in Access. You'll have to google around for the answer or wait for someone else to answer. It will be something like this:

    Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,CreditCardNo,Notes from MLoan WHERE ReminderDate BETWEEN DATEVALUE(Now()) + '00:00:00' AND DATEVALUE(Now()) + '23:59:59'

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    Unhappy Re: Problems with the DataGridView!!!

    I tried the query that you gave;i get this exception:
    Attachment 73021
    The datatype of ReminderDate is set to text in the access Database.......
    Do i need to change this select query:
    Code:
    Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,CreditCardNo,
    Notes from MLoan WHERE ReminderDate BETWEEN DATEVALUE(Now()) + '00:00:00' AND DATEVALUE(Now()) + '23:59:59' ", myConnection)
    Last edited by gautamshaw; Feb 21st, 2010 at 01:21 PM.

  9. #9

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    Unhappy Re: Problems with the DataGridView!!!

    i just googled through a few pages and i got this:
    Attachment 73027
    So i modified my query to this:
    Code:
    Dim da As OleDbDataAdapter = New OleDbDataAdapter
    ("Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,
    CreditCardNo,Notes from MLoan where ReminderDate=Today ", myConnection)
    But when i execute the application,i am getting this exception:
    Attachment 73028
    Any hints?
    Last edited by gautamshaw; Feb 21st, 2010 at 01:21 PM.

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    Unhappy Re: Problems with the DataGridView!!!

    I tried this:
    Code:
     Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Etech.mdb"
            Dim myConnection As OleDbConnection = New OleDbConnection
            myConnection.ConnectionString = connString
            Dim da As OleDbDataAdapter = New OleDbDataAdapter("Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,CreditCardNo,Notes from MLoan where ReminderDate=@reminderdate ", myConnection)
            Dim ds As DataSet = New DataSet
            DataGridView1.Columns(0).DataPropertyName = "LAcNo"
            DataGridView1.Columns(1).DataPropertyName = "IssuerName"
            DataGridView1.Columns(2).DataPropertyName = "Creditor"
            DataGridView1.Columns(3).DataPropertyName = "Amount"
            DataGridView1.Columns(4).DataPropertyName = "ROI"
            DataGridView1.Columns(5).DataPropertyName = "EMIAmount"
            DataGridView1.Columns(6).DataPropertyName = "BankAcNo"
            DataGridView1.Columns(7).DataPropertyName = "CreditCardNo"
            DataGridView1.Columns(8).DataPropertyName = "Notes"
            cmd.Parameters.AddWithValue("@reminderdate", Today.ToString)
             da.Fill(ds, "MLoan")
            Dim dt As New DataTable
            da.Fill(dt)
            DataGridView1.DataSource = dt
    This time i am getting this error:
    Attachment 73031
    Any suggestion please.....
    Last edited by gautamshaw; Feb 21st, 2010 at 01:21 PM.

  11. #11

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    Re: Problems with the DataGridView!!!

    I gave another try with the code and i came up with this but in vain:
    Code:
     Try
                Using con As New OleDbConnection("Provider=Microsoft.Jet.Oledb.4.0;Data Source=Etech.mdb")
                    con.Open()
                    cmd = New OleDbCommand("Select LAcNo,IssuerName,Creditor,Amount,ROI,EMIAmount,BankAcNo,CreditCardNo,Notes from MLoan where ReminderDate=@RemDate ", con)
                    cmd.Parameters.AddWithValue("@RemDate", Date.Now.Date)
                    Dim da As New OleDbDataAdapter(cmd)
                    Dim ds As DataSet = New DataSet
                    da.Fill(ds, "MLoan")
                    Dim dt As New DataTable
                    Dim row As DataRow
                    da.Fill(dt)
                    DataGridView1.DataSource = dt
                    For Each row In dt.Rows
                        DataGridView1.Columns(0).DataPropertyName = "LAcNo"
                        DataGridView1.Columns(1).DataPropertyName = "IssuerName"
                        DataGridView1.Columns(2).DataPropertyName = "Creditor"
                        DataGridView1.Columns(3).DataPropertyName = "Amount"
                        DataGridView1.Columns(4).DataPropertyName = "ROI"
                        DataGridView1.Columns(5).DataPropertyName = "EMIAmount"
                        DataGridView1.Columns(6).DataPropertyName = "BankAcNo"
                        DataGridView1.Columns(7).DataPropertyName = "CreditCardNo"
                        DataGridView1.Columns(8).DataPropertyName = "Notes"
                        Next
                End Using
            Catch ex As Exception
            End Try
    No data is selected from the database......
    Need some help
    thank you
    Last edited by gautamshaw; Sep 6th, 2009 at 11:53 AM.

  12. #12

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    Re: Problems with the DataGridView!!!

    need some help!!!

  13. #13
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    Re: Problems with the DataGridView!!!

    Do you have your .mdb file? I would like to take a stab at it for you. If so, send it to my email address...

  14. #14

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    Re: Problems with the DataGridView!!!

    I just gave a snapshot of my mdb file in my very first post.......
    Have a look at it

  15. #15
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    Re: Problems with the DataGridView!!!

    First if ReminderDate is set as a Text field then change it. It should be a date not text.
    Most likely the problem is that the dates are not exact. In your original screen print the dates have times also, which is normal for a database. So unless the dates have a time of midnight then they wont be an exact match to Date.Now.Date. This is why I suggested the BETWEEN statement in my code earlier.

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