/// <summary>
??/// 把預定內容導入到Text文檔
??/// </summary>
??private void ChangeDbToText()

??{?
???this.RecNum.Visible=true;
???//建立文件，并打開
???string oneLine = "";
???string filename = "Storage Card/YD"+ DateTime.Now.ToString("yyyyMMddhhmmss")+".txt";
???FileInfo finfo = new FileInfo(filename);
???StreamWriter w = finfo.CreateText();
???w.BaseStream.Seek(0, SeekOrigin.End);???
???SqlCeCommand sqlTable = Mc.gConn.CreateCommand();
???sqlTable.CommandText = "select * from YDK ";
???SqlCeDataReader Dr=sqlTable.ExecuteReader();
???try
???{
????int i=0;
????while(Dr.Read())
????{
?????//輸出一條到文件
?????oneLine = Dr["ISBN"].ToString().PadRight(20,' ')+Dr["BookNum"].ToString().PadRight(10,' ')+Dr["Rdate"].ToString().PadRight(10,' ')+"????? "+Dr["ShuShang"].ToString().PadRight(10,' ');
?????w.WriteLine(oneLine);
?????i+=1;
?????if(i%100==0)
?????{
??????this.RecNum.Text=i.ToString();
??????this.RecNum.Refresh();
?????}

????}
????//關閉文件
????w.Close();
?

????MessageBox.Show("成功導出"+i.ToString().Trim()+"條!");
????this.RecNum.Visible=false;
????Dr.Close();
???}
???catch
???{
????MessageBox.Show("未導出數據!");
????this.RecNum.Visible=false;
????Dr.Close();
???}
???
??}?

總結

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