我在C# windows 程序中有一个问题，我无法使用 2 个数据库，这些数据库是表和数据中的简单数据库。在这个项目中，我想打开 Access 数据库并使用另一个名称创建新的 Access 数据库，但具有相同的表、列和行，并填充源数据库中的源数据。
我无法从源数据库读取并插入新的目标数据库。源代码如下，请帮我完成这个项目，非常感谢。
private void button3_Click(object sender, EventArgs e)
{
OleDbConnection cn = new OleDbConnection();
cn.ConnectionString = @"provider=Microsoft.ACE.OLEDB.12.0;" + @"data source=" + openFileDialog1.FileName;
OleDbCommand cmd = new OleDbCommand();
cn.Open();
DataTable table = cn.GetSchema("Tables");
int i = 0;
foreach (System.Data.DataRow row in table.Rows)
{
if ((string)row["TABLE_TYPE"] == "TABLE")
{
comboBox1.Items.Add(row["TABLE_NAME"]);
Tables[i] = row["TABLE_NAME"].ToString();
listBox1.Items.Add(Tables[i]);
i++;
n++;
}
}
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
OleDbConnection conne = new OleDbConnection();
conne.ConnectionString = @"provider=Microsoft.ACE.OLEDB.12.0;" + @"data source=" + openFileDialog1.FileName;
conne.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conne;
DataTable Dt = new DataTable();
cmd.CommandText = "select * from " + comboBox1.Text;
OleDbDataAdapter adapter = new OleDbDataAdapter();
adapter.SelectCommand = cmd;
adapter.Fill(Dt);
dataGridView1.DataSource = Dt;
dataGridView1.Visible = true;
conne.Close();
}
private void button2_Click(object sender, EventArgs e)
{
saveFileDialog1.Filter = "accdb|*.accdb";
saveFileDialog1.Title = "Save Access DataBase File";
saveFileDialog1.FileName = strFileName;
saveFileDialog1.ShowDialog();
System.IO.File.Copy(openFileDialog1.FileName, saveFileDialog1.FileName);
ADOX.Catalog cat = new ADOX.Catalog();
cat.Create("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + saveFileDialog1.FileName);
Console.WriteLine("Database Created Successfully");
OleDbConnection connsave = new OleDbConnection();
connsave.ConnectionString = @"provider=Microsoft.ACE.OLEDB.12.0;" + @"data source=" + saveFileDialog1.FileName;
connsave.Open();
OleDbCommand cmdsave = new OleDbCommand();
cmdsave.Connection = connsave;
OleDbConnection connopen = new OleDbConnection();
connopen.ConnectionString = @"provider=Microsoft.ACE.OLEDB.12.0;" + @"data source=" + openFileDialog1.FileName;
connopen.Open();
OleDbCommand cmdopen = new OleDbCommand();
cmdopen.Connection = connopen;
int i = 0;
foreach (string strtablename in Tables)
{
if (i < n)
{
cmdsave.CommandText = "CREATE TABLE [" + Tables[i] + "]";
cmdsave.ExecuteNonQuery();
cmdsave.CommandText = "DELETE FROM [" + Tables[i] + "]";
cmdsave.ExecuteNonQuery();
cmdopen.CommandText = "SELECT * FROM [" + Tables[i] + "]";
cmdopen.ExecuteNonQuery();
cmdsave.CommandText = "INSErT INTO [" + Tables[i] + "]";
cmdsave.ExecuteNonQuery();
i++;
}
}
connopen.Close();
connsave.Close();
textBox2.Text = saveFileDialog1.FileName.ToString();
MessageBox.Show("DataBase Save Sucessfull in \"" + textBox2.Text + "\"");
}