Databases
StackOverflow2013
Postsdbo
POCross-thread calls to WF controls
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POCross-thread calls to WF controls
    primarykey
    data
    text
    <p>I am work with SharpPcap library. I have following code:</p> <pre><code>private void button1_Click(object sender, EventArgs e) { LivePcapDevice device = deviceList[cbDeviceList.SelectedIndex]; device.OnPacketArrival += new PacketArrivalEventHandler(device_OnPacketArrival); device.Open(DeviceMode.Promiscuous, 1000); device.StartCapture(); btStop.Enabled = true; btStartCapture.Enabled = false; } void device_OnPacketArrival(object sender, CaptureEventArgs e) { dgvPacketInfo.Rows.Add(e.Packet.Data, e.Packet.Timeval, e.Packet.LinkLayerType); } </code></pre> <p>I've got an exception is thrown:InvalidOperationException with the message, "Control dgvPacketInfo accessed from a thread other than the thread it was created on." I read <a href="http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&amp;l=EN-US&amp;k=k(EHINVALIDOPERATION.WINFORMS.ILLEGALCROSSTHREADCALL);k(TargetFrameworkMoniker-%22.NETFRAMEWORK%2cVERSION%3dV3.5%22);k(DevLang-CSHARP)&amp;rd=true" rel="nofollow noreferrer">this</a>. And rewrite my code like this:</p> <pre><code>private delegate void GetPacketInfoCallback(CaptureEventArgs packet); void device_OnPacketArrival(object sender, CaptureEventArgs e) { Thread newThread = new Thread(delegate() { GetPacketInfoCallback getPacketInfoCallback = new GetPacketInfoCallback(PrintIntoGridView); this.Invoke(getPacketInfoCallback, new object[] {e}); }); } private void PrintIntoGridView(CaptureEventArgs captureEventArgs) { dgvPacketInfo.Rows.Add("1", "2", "3"); // simple for test dgvPacketInfo.Rows.Add(captureEventArgs.Packet.Data, captureEventArgs.Packet.Timeval, captureEventArgs.Packet.LinkLayerType); } </code></pre> <p>But method PrintIntoGridView not called. What's problem? PS. Sorry for my English.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USuser348173
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload