Problems to access data and saving date/time to database

[Ruy Castelli]

I created a ASP.NET page using C# and I'm using two components to access a
MS-Access database, which are:

- oleDbConnection
- oleDataAdapter

The MS-Access database is in the correct directory (IIS has permission to
read/write) and everything seems ok, but IIS says that it can't open the
file because there is someone else using it exclusively (impossible, I'm
using a stand alone computer and I closed everything) or I need permission
to open the file, which is strange too.

On the .net framework configuration, I set all codes in my computer to have
"full trust", is this the correct way of doing it? Or a should actually
register the dll file on it? How is this supposed to be done?

I also would like to know if the way I'm trying to save date/time to the
database is correct.

--------- code ---------

protected System.Web.UI.WebControls.Label Label1;

protected System.Web.UI.WebControls.RequiredFieldValidator
RequiredFieldValidator1;

protected System.Web.UI.WebControls.TextBox nome;

protected System.Web.UI.WebControls.RequiredFieldValidator
RequiredFieldValidator2;

protected System.Web.UI.WebControls.TextBox msg;

protected System.Web.UI.WebControls.Label Label2;

protected System.Data.OleDb.OleDbConnection oleDbConnection1;

protected System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1;

protected System.Data.OleDb.OleDbCommand oleDbSelectCommand1;

protected System.Data.OleDb.OleDbCommand oleDbInsertCommand1;

protected System.Web.UI.WebControls.Label Erro;

protected System.Web.UI.WebControls.Button Button1;

private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
if (IsPostBack)
{
try {
oleDbConnection1.Open();

oleDbDataAdapter1.InsertCommand.CommandText =
"INSERT INTO [msg log] "+
"(hora, msg, nome) "+
"VALUES ("+
"'"+DateTime.Now.ToString()+"', "+
"'"+nome.Text+"', "+
"'"+msg.Text+"')";

oleDbDataAdapter1.InsertCommand.ExecuteNonQuery();

oleDbConnection1.Close();

nome.Text = "";
msg.Text = "";

Erro.Visible = false;
}
catch (System.Data.OleDb.OleDbException exception)
{
Erro.Visible = true;
Erro.Text = "Erro no servidor: " +
exception.ToString();
}
}
}

--------- code ---------

Thanks.

 

[Guest]

Hi Ruy Castelli,

The problem arises , since the user you are using for running your
application don't have permission to open the access file.


Goto the folder location which contains the Access File.

Select the propertis for that folder and goto the security tab. Make sure
that ASPNET user is added in the list and has full permisson. Moreover if you
are using a widnows based authentication ...then include that user account
also in the list with necessary permission.

Just make sure the same security settings for the mdb file too.

Cheers,

Jerome. M

I created a ASP.NET page using C# and I'm using two components to access a
MS-Access database, which are:

- oleDbConnection
- oleDataAdapter

The MS-Access database is in the correct directory (IIS has permission to
read/write) and everything seems ok, but IIS says that it can't open the
file because there is someone else using it exclusively (impossible, I'm
using a stand alone computer and I closed everything) or I need permission
to open the file, which is strange too.

On the .net framework configuration, I set all codes in my computer to have
"full trust", is this the correct way of doing it? Or a should actually
register the dll file on it? How is this supposed to be done?

I also would like to know if the way I'm trying to save date/time to the
database is correct.

--------- code ---------

protected System.Web.UI.WebControls.Label Label1;

protected System.Web.UI.WebControls.RequiredFieldValidator
RequiredFieldValidator1;

protected System.Web.UI.WebControls.TextBox nome;

protected System.Web.UI.WebControls.RequiredFieldValidator
RequiredFieldValidator2;

protected System.Web.UI.WebControls.TextBox msg;

protected System.Web.UI.WebControls.Label Label2;

protected System.Data.OleDb.OleDbConnection oleDbConnection1;

protected System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1;

protected System.Data.OleDb.OleDbCommand oleDbSelectCommand1;

protected System.Data.OleDb.OleDbCommand oleDbInsertCommand1;

protected System.Web.UI.WebControls.Label Erro;

protected System.Web.UI.WebControls.Button Button1;

private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
if (IsPostBack)
{
try {
oleDbConnection1.Open();

oleDbDataAdapter1.InsertCommand.CommandText =
"INSERT INTO [msg log] "+
"(hora, msg, nome) "+
"VALUES ("+
"'"+DateTime.Now.ToString()+"', "+
"'"+nome.Text+"', "+
"'"+msg.Text+"')";

oleDbDataAdapter1.InsertCommand.ExecuteNonQuery();

oleDbConnection1.Close();

nome.Text = "";
msg.Text = "";

Erro.Visible = false;
}
catch (System.Data.OleDb.OleDbException exception)
{
Erro.Visible = true;
Erro.Text = "Erro no servidor: " +
exception.ToString();
}
}
}

--------- code ---------

Thanks.