# aardio 范例: Data Url 转换工具



```aardio
//Data URL 转换
import win.ui;
/*DSG{{*/
var winform = win.form(text="Data Url 转换工具";left=-50;right=399;bottom=325;topmost=1)
winform.add(
edit={cls="edit";left=9;top=9;right=439;bottom=292;acceptfiles=1;anchors={left=1;top=1;right=1;bottom=1};edge=1;font=LOGFONT(name='宋体');hscroll=1;multiline=1;vscroll=1;z=1};
static={cls="static";text="请将图片等文件拖放到上面的文本框中进行转换";left=11;top=300;right=433;bottom=324;anchors={left=1;bottom=1};transparent=1;z=2}
)
/*}}*/
 
import fsys;
import fsys.mime;
winform.edit.wndproc = function(hwnd,message,wParam,lParam){
	if( message == 0x233/*_WM_DROPFILES*/ ){
		if( winform.edit.busy ) return;
		
		var path = win.getDropFile(wParam)[1]
		if( fsys.isDir(path) ){
			winform.edit.text = "路径不能是一个目录"
			return;
		}
		
		var mime = fsys.mime.fromFile( path )
		if(!mime){
			winform.edit.text = "无效的文件格式";
			return;
		}
		
		winform.edit.busy = true;
		winform.edit.text = "正在转换,请稍候......"; 
		winform.edit.text =	thread.invokeAndWait(function(path,mime){
			import inet.urlData;
			return inet.urlData(,path); 
		},path,mime); 
		
		winform.edit.busy = false;
	}
}

winform.show() 
win.loopMessage();

```