How to select SQL compact file path by a button?

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SqlDataSource

Hi,
I want to make SQL Compact file path selection dynamic so user would select their own file.
I can get user's selected file path using following code:

private void FilePath_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog();
            if (openFileDialog1.ShowDialog()==DialogResult.OK)
            {
                string strText = openFileDialog1.FileName;
                txtPath.Text = strText;
            }
        }

But I have no idea about how to use the grabbed file path (in a textbox) as a SQL data table file path.
Please guide me. My current SQL data table code (static) is:

SqlCeConnection myConnection = new SqlCeConnection();
            myConnection.ConnectionString = @"Data Source=C:\Users\Dell\Desktop\DataGridView\PMinfo.sdf";

What I have tried:

SqlCeConnection myConnection = new SqlCeConnection();
            myConnection.ConnectionString = @"Data Source=C:\Users\Dell\Desktop\DataGridView\PMinfo.sdf";