TraceImage _info = null; // 事件之间传递信息
void DownloadImages()
{
if (_trace_images.Count == 0)
{
return;
}
_info = _trace_images[0];
_trace_images.RemoveAt(0);
_info.FileName = GetTempFileName();
string strError = "";
if (_webClient == null)
{
_webClient = new WebClient();
}
_webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(webClient_downloadFileCompleted);
try
{
_webClient.DownloadFileAsync(new Uri(_info.ImageUrl, UriKind.Absolute),
_info.FileName, null);
}
catch (Exception ex)
{
strError = ex.Message;
_info.Row[COLUMN_IMAGE].Text = strError;
}
}
void SetErrorText(TraceImage info, string strError)
{
if (this.dpTable_items.InvokeRequired)
{
this.dpTable_items.Invoke(new Action <TraceImage, string>(SetErrorText), info, strError);
return;
}
info.Row[COLUMN_IMAGE].Text = strError;
info.Row[COLUMN_IMAGE].OwnerDraw = false;
}
void AddTraceItem(DpRow row)
{
AmazonBiblioInfo info = row.Tag as AmazonBiblioInfo;
if (info != null && string.IsNullOrEmpty(info.ImageUrl) == false)
{
TraceImage trace = new TraceImage();
trace.ImageUrl = info.ImageUrl;
trace.Row = row;
lock (_trace_images)
{
_trace_images.Add(trace);
}
}
}
TraceImage _info = null; // 事件之间传递信息
void DownloadImages()
{
if (_trace_images.Count == 0)
return;
_info = _trace_images[0];
_trace_images.RemoveAt(0);
_info.FileName = GetTempFileName();
string strError = "";
if (_webClient == null)
_webClient = new WebClient();
_webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(webClient_downloadFileCompleted);
try
{
_webClient.DownloadFileAsync(new Uri(_info.ImageUrl, UriKind.Absolute),
_info.FileName, null);
}
catch (Exception ex)
{
strError = ex.Message;
_info.Row[COLUMN_IMAGE].Text = strError;
}
}
void SetErrorText(TraceImage info, string strError)
{
if (this.dpTable_items.InvokeRequired)
{
this.dpTable_items.Invoke(new Action<TraceImage, string>(SetErrorText), info, strError);
return;
}
info.Row[COLUMN_IMAGE].Text = strError;
info.Row[COLUMN_IMAGE].OwnerDraw = false;
}
void AddTraceItem(DpRow row)
{
AmazonBiblioInfo info = row.Tag as AmazonBiblioInfo;
if (info != null && string.IsNullOrEmpty(info.ImageUrl) == false)
{
TraceImage trace = new TraceImage();
trace.ImageUrl = info.ImageUrl;
trace.Row = row;
lock (_trace_images)
{
_trace_images.Add(trace);
}
}
}
// 加入一个浏览行
public void AddBiblioBrowseLine(
string strBiblioRecPath,
string strBrowseText,
AmazonBiblioInfo info)
{
if (this.dpTable_items.InvokeRequired)
{
// 事件是在多线程上下文中触发的，需要 Invoke 显示信息
this.BeginInvoke(new Action<string, string, AmazonBiblioInfo>(AddBiblioBrowseLine),
strBiblioRecPath,
strBrowseText,
info);
return;
}
// 检查已经存在的最后一行是否为命令行
if (this.dpTable_items.Rows.Count > 0)
{
DpRow tail = this.dpTable_items.Rows[this.dpTable_items.Rows.Count - 1];
if (string.IsNullOrEmpty(tail[0].Text) == true)
this.dpTable_items.Rows.RemoveAt(this.dpTable_items.Rows.Count - 1);
}
List<string> columns = StringUtil.SplitList(strBrowseText, '\t');
DpRow row = new DpRow();
row.LineAlignment = StringAlignment.Center;
DpCell cell = new DpCell();
cell.Text = (this.dpTable_items.Rows.Count + 1).ToString();
cell.Font = this._idFont;
cell.ForeColor = SystemColors.GrayText;
row.Add(cell);
#if NO
cell = new DpCell();
cell.Text = strBiblioRecPath;
row.Add(cell);
#endif
cell = new DpCell();
// cell.Text = info.ImageUrl;
// cell.Text = "正在加载图片 ...";
row.Add(cell);
int i = 0;
foreach (string s in columns)
{
cell = new DpCell();
cell.Text = s;
if (i == 0)
cell.Font = this._titleFont;
row.Add(cell);
i++;
}
row.Tag = info;
// row[COLUMN_IMAGE].OwnerDraw = true;
this.dpTable_items.Rows.Add(row);
#if NO
if (string.IsNullOrEmpty(info.ImageUrl) == false)
{
TraceImage trace = new TraceImage();
trace.ImageUrl = info.ImageUrl;
trace.Row = row;
lock (_trace_images)
{
_trace_images.Add(trace);
}
}
#endif
AddTraceItem(row);
}
// 下载图像文件。因为在线程中使用，所以使用同步的版本就行
void DownloadImages()
{
TraceImage info = null;
lock (_trace_images)
{
if (_trace_images.Count == 0)
{
return;
}
info = _trace_images[0];
_trace_images.RemoveAt(0);
}
info.FileName = GetTempFileName();
string strError = "";
if (_webClient == null)
{
_webClient = new MyWebClient();
_webClient.Timeout = 5000;
_webClient.CachePolicy = new System.Net.Cache.RequestCachePolicy(System.Net.Cache.RequestCacheLevel.CacheIfAvailable);
}
try
{
_webClient.DownloadFile(new Uri(info.ImageUrl, UriKind.Absolute), info.FileName);
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError)
{
var response = ex.Response as HttpWebResponse;
if (response != null)
{
if (response.StatusCode == HttpStatusCode.NotFound)
{
strError = ex.Message;
SetErrorText(info, strError);
goto END1;
}
}
}
strError = ex.Message;
SetErrorText(info, strError);
}
catch (Exception ex)
{
strError = ExceptionUtil.GetAutoText(ex);
SetErrorText(info, strError);
#if NO
info.Row[COLUMN_IMAGE].Text = strError;
info.Row[COLUMN_IMAGE].OwnerDraw = false;
#endif
}
if (this.IsDisposed == true || this.Visible == false ||
info == null)
{
return;
}
// _info.Row[COLUMN_IMAGE].Image = Image.FromFile(_info.FileName);
SetImage(info.Row[COLUMN_IMAGE], info.FileName);
END1:
this.ActivateThread();
}
// 加入一个浏览行
public void AddBiblioBrowseLine(
string strBiblioRecPath,
string strBrowseText,
AmazonBiblioInfo info)
{
if (this.dpTable_items.InvokeRequired)
{
// 事件是在多线程上下文中触发的，需要 Invoke 显示信息
this.BeginInvoke(new Action <string, string, AmazonBiblioInfo>(AddBiblioBrowseLine),
strBiblioRecPath,
strBrowseText,
info);
return;
}
// 检查已经存在的最后一行是否为命令行
if (this.dpTable_items.Rows.Count > 0)
{
DpRow tail = this.dpTable_items.Rows[this.dpTable_items.Rows.Count - 1];
if (string.IsNullOrEmpty(tail[0].Text) == true)
{
this.dpTable_items.Rows.RemoveAt(this.dpTable_items.Rows.Count - 1);
}
}
List <string> columns = StringUtil.SplitList(strBrowseText, '\t');
DpRow row = new DpRow();
row.LineAlignment = StringAlignment.Center;
DpCell cell = new DpCell();
cell.Text = (this.dpTable_items.Rows.Count + 1).ToString();
cell.Font = this._idFont;
cell.ForeColor = SystemColors.GrayText;
row.Add(cell);
#if NO
cell = new DpCell();
cell.Text = strBiblioRecPath;
row.Add(cell);
#endif
cell = new DpCell();
// cell.Text = info.ImageUrl;
// cell.Text = "正在加载图片 ...";
row.Add(cell);
int i = 0;
foreach (string s in columns)
{
cell = new DpCell();
cell.Text = s;
if (i == 0)
{
cell.Font = this._titleFont;
}
row.Add(cell);
i++;
}
row.Tag = info;
// row[COLUMN_IMAGE].OwnerDraw = true;
this.dpTable_items.Rows.Add(row);
#if NO
if (string.IsNullOrEmpty(info.ImageUrl) == false)
{
TraceImage trace = new TraceImage();
trace.ImageUrl = info.ImageUrl;
trace.Row = row;
lock (_trace_images)
{
_trace_images.Add(trace);
}
}
#endif
AddTraceItem(row);
}
