오픈 파일 다이얼로그에서 여러가지 파일을 선택하는 방법 
 

<span style="FONT-FAMILY: 돋움체; COLOR: blue; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-no-proof: yes" lang="EN-US">private void btn_open_Click(object sender, EventArgs e)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
{<o:p></o:p>
&nbsp;&nbsp;&nbsp; OpenFileDialog openFileDialog = new OpenFileDialog();<o:p></o:p>
&nbsp;&nbsp;&nbsp; openFileDialog.Filter = "TXT file|*.txt";<o:p></o:p>
&nbsp;&nbsp;&nbsp; openFileDialog.Multiselect = true;<o:p></o:p>
<o:p>&nbsp;</o:p>
&nbsp;&nbsp;&nbsp; if (DialogResult.OK == openFileDialog.ShowDialog())<o:p></o:p>
&nbsp;&nbsp;&nbsp; {<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; foreach (string x in openFileDialog.FileNames)<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; listBox1.Items.Add(x);<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<o:p></o:p>
&nbsp;&nbsp;&nbsp; }<o:p></o:p>
<span style="LINE-HEIGHT: 115%; FONT-FAMILY: 돋움체; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-no-proof: yes" lang="EN-US">}<o:p></o:p>

OpenFileDialog Multiselect 오픈파일 다이얼로그 멀티셀렉트