C#点击load在指定位置创建TXT文件，并把读取的内容生成到TXT文件（已实现读取数据库内容）

代码如下，求帮忙
namespace LDD__Generator
{
public partial class LDD : Form
{
public LDD()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
GetData();

}

private void GetData()
{
    try
    {
        DataTable dtMAT_NR = SQLUtility.Select("Select MAT_NR From ADE_LOS Where LOS_NR = '" + txtLOS_NR.Text.Trim() + "'", null);

        DataTable dtPANELID = SQLUtility.Select("Select PANELID From FCBDB.dbo.PANELTAB Where LOSID ='" + txtLOS_NR.Text.Trim() + "'", null);

    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        return;
    }
}

private void txtLOS_NR_KeyPress(object sender, KeyPressEventArgs e)
{
    GetData();
}

}



这个是需要的结果图

求指教怎么写