I an trying to do a simple task of reading from one table "tab2" in a database->save to xml and then reload it into table "tab1" both have the same structure, I asked previously and received the following code as an answer.
I am having problems I am now getting the database filed ONCE per item but with a date time stamp I don't think its writing the XML from reading the database properly I am running it twice to get the schema and once for data.
private void button1_Click(object sender, EventArgs e)
{
try
{
string ConnString = (@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\temp\\names.accdb;Persist Security Info=False");
using (OleDbConnection Conn = new OleDbConnection(ConnString))
{
//Conn.Close();//severl times connection has been open
Conn.Open();
DataSet ds = new DataSet();
ds.ReadXml(@"c:\\temp\\tab2.xml");
OleDbCommand cmd = new OleDbCommand();
//OleDbCommand cmd1 = new OleDbCommand();
DataTable dtCSV = new DataTable();
dtCSV = ds.Tables[0];
cmd.Connection = Conn;
cmd.CommandType = CommandType.Text;
//cmd.Parameters.Add(new OleDbParameter("@field1", Convert.ToString(dtCSV.Rows[0][0])));// = 1234;
//cmd1.Connection = Conn;
for (int row = 0; row <= dtCSV.Rows.Count - 1; row++)
{
//for (int col = 0; col < dtCSV.Columns.Count - 1; col++)
//{
// //cmd.CommandText = ("INSERT INTO tab1 ( field1, field2) VALUES (dtCSV.Rows ,dtCSV.Columns)");
//}
cmd.Parameters.Clear();
if (dtCSV.Columns.Count > 1)
{
//command.Parameters.Add(new OleDbParameter("@EMPID", Convert.Tostring(empsplitIt[1])));
//cmd.Parameters.Add(dtCSV.Rows[row][0]);
cmd.Parameters.Add(new OleDbParameter("@Field1", Convert.ToString(dtCSV.Rows[row][0])));
cmd.Parameters.Add(new OleDbParameter("@dtCSV", Convert.ToString(dtCSV.Rows[row][1])));
cmd.CommandText = ("INSERT INTO tab1 ( field1, field2) VALUES (? , ?)");
cmd.ExecuteNonQuery();
}
}
//Conn.Close();
}
}
catch (Exception ex)
{
richTextBox1.Text = richTextBox1.Text + "\n Error " + ex + "\n"; ;
}
}
private void button2_Click(object sender, EventArgs e)
{
{
string ConnString = (@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\temp\\names.mdb;Persist Security Info=False");
using (OleDbConnection Conn = new OleDbConnection(ConnString))
{
string strSql = "Select * from Table1"; //only launch in main
richTextBox1.Text = richTextBox1.Text + " Querying Launch Parameters";
try
{
OleDbConnection con = new OleDbConnection("Provider = Microsoft.ACE.OLEDB.12.0; Data Source = C:\\temp\\names.mdb; Persist Security Info = False");
OleDbCommand cmd = new OleDbCommand(strSql, con);
con.Open();
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "fname,sname");
// Extract data set to XML file
ds.WriteXml(@"c:\\temp\\tab2.xml", XmlWriteMode.WriteSchema);
ds.WriteXml(@"c:\\temp\\tab2.xml");
}
catch (Exception ex)
{
richTextBox1.Text = richTextBox1.Text + "\n Error " + ex + "\n"; ;
}
}
}
}
}
I find from my code that there is two different connection strings with in it when I putin the corect spelling correcting these it now fails on the line
dtCSV = ds.Tables[0];
with this
Error System.IndexOutOfRangeException: Cannot find table 0. at System.Data.DataTableCollection.get_Item(Int32 index) at WindowsFormsApp8.Form1.button1_Click(Object sender, EventArgs e) in
Code:
private void button1_Click(object sender, EventArgs e)
{
try
{
string ConnString = (@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\temp\\names.mdb;Persist Security Info=False");
using (OleDbConnection Conn = new OleDbConnection(ConnString))
{
//Conn.Close();//severl times connection has been open
Conn.Open();
DataSet ds = new DataSet();
ds.ReadXml(@"c:\\temp\\tabel2.xml");
OleDbCommand cmd = new OleDbCommand();
//OleDbCommand cmd1 = new OleDbCommand();
DataTable dtCSV = new DataTable("tabel1");
dtCSV = ds.Tables[0];
cmd.Connection = Conn;
cmd.CommandType = CommandType.Text;
//cmd.Parameters.Add(new OleDbParameter("@field1", Convert.ToString(dtCSV.Rows[0][0])));// = 1234;
//cmd1.Connection = Conn;
for (int row = 0; row <= dtCSV.Rows.Count - 1; row++)
{
//for (int col = 0; col < dtCSV.Columns.Count - 1; col++)
//{
// //cmd.CommandText = ("INSERT INTO tab1 ( field1, field2) VALUES (dtCSV.Rows ,dtCSV.Columns)");
//}
cmd.Parameters.Clear();
if (dtCSV.Columns.Count > 1)
{
//command.Parameters.Add(new OleDbParameter("@EMPID", Convert.Tostring(empsplitIt[1])));
//cmd.Parameters.Add(dtCSV.Rows[row][0]);
cmd.Parameters.Add(new OleDbParameter("@field1", Convert.ToString(dtCSV.Rows[row][0])));
cmd.Parameters.Add(new OleDbParameter("@field2", Convert.ToString(dtCSV.Rows[row][1])));
cmd.CommandText = ("INSERT INTO tabel1 ( field1, field2) VALUES (? , ?)");
cmd.ExecuteNonQuery();
}
}
//Conn.Close();
}
}
catch (Exception ex)
{
richTextBox1.Text = richTextBox1.Text + "\n Error " + ex + "\n"; ;
}
}
private void button2_Click(object sender, EventArgs e)
{
{
string ConnString = (@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\temp\\names.mdb;Persist Security Info=False");
using (OleDbConnection Conn = new OleDbConnection(ConnString))
{
string strSql = "Select * from tabel2"; //only launch in main
richTextBox1.Text = richTextBox1.Text + " Querying Launch Parameters";
try
{
OleDbConnection con = new OleDbConnection(ConnString);
OleDbCommand cmd = new OleDbCommand(strSql, con);
con.Open();
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "fname,sname");
// Extract data set to XML file
ds.WriteXml(@"c:\\temp\\tabel2.xml", XmlWriteMode.WriteSchema);
ds.WriteXml(@"c:\ \temp\\tabel2.xml");
}
catch (Exception ex)
{
richTextBox1.Text = richTextBox1.Text + "\n Error " + ex + "\n"; ;
}
}
}
}
}
