关于更新WINFORM界面控件的问题

[仓木泽]

更新TreeView，因为结点上万，所以使用了异步调用，代码如下：
Delegate d = new ThreadStart(this.BindTree);
tvNode.BeginInvoke(d);
BindTree是绑定树的函数。
但是我这么绑定之后界面还是处于锁死状态。
请做过的给点经验，或者解决方法。
我的主窗体是MDIFrom的父窗体。

[张赐]

帮你顶

[工具箱]

我也来顶！！

[仓木泽]

@Knight94(愚翁)
在我的程序里面Invoke和BeginInvoke都会让界面死锁

[Knight94]

能否贴出你的代码

[仓木泽]

顶!

[wfhlxl]

public class AsyncMain {
// Asynchronous method puts the thread id here.
private static int threadId;

static void Main(string[] args) {
// Create an instance of the test class.
AsyncDemo ad = new AsyncDemo();

// Create the delegate.
AsyncDelegate dlgt = new AsyncDelegate(ad.TestMethod);

// Initiate the asychronous call. Include an AsyncCallback
// delegate representing the callback method, and the data
// needed to call EndInvoke.
IAsyncResult ar = dlgt.BeginInvoke(3000,
out threadId,
new AsyncCallback(CallbackMethod),
dlgt );

Console.WriteLine("Press Enter to close application.");
Console.ReadLine();
}

// Callback method must have the same signature as the
// AsyncCallback delegate.
static void CallbackMethod(IAsyncResult ar) {
// Retrieve the delegate.
AsyncDelegate dlgt = (AsyncDelegate) ar.AsyncState;

// Call EndInvoke to retrieve the results.
string ret = dlgt.EndInvoke(out threadId, ar);

Console.WriteLine("The call executed on thread {0}, with return value \"{1}\".", threadId, ret);
}
}

[Knight94]

你应该用EndInvoke来进行返回

否则，直接调用Invoke即可。

[Samen168]

非本窗口线程是不能创建新控件的

[仓木泽]

private void frmMain_Load(object sender, EventArgs e)
{
InitializeCommands();
Delegate d = new ThreadStart(this.BindTree);
tvNode.BeginInvoke(d);
}
以上是窗体加载的时候调用BeginInvoke
private void BindTree()
{
try
{
tvNode.BeginUpdate();
tvNode.Nodes.Clear();

SUYUAN.PBJCXT.BLL.FormMain dept = new SUYUAN.PBJCXT.BLL.FormMain();
SUYUAN.PBJCXT.Collection.S_DEPTINFO cdept = dept.GetDeptList("and BELONGDEPTID=-1");
for(int i = 0;i<cdept.Count;i++)
{
//添加顶级节点
TreeNode topNode = new TreeNode(cdept[i].DEPTNAME);
topNode.Tag = (Object)cdept[i];
//添加次级节点
SUYUAN.PBJCXT.Collection.S_DEPTINFO cdeptSub = dept.GetDeptList("and BELONGDEPTID="+cdept[i].DEPTID+"");
for(int j = 0;j<cdeptSub.Count;j++)
{
TreeNode subNode = new TreeNode(cdeptSub[j].DEPTNAME);
subNode.Tag = (Object)cdeptSub[j];
//添加变电站
SUYUAN.PBJCXT.BLL.FormMain mf = new SUYUAN.PBJCXT.BLL.FormMain();
string sqlstr = " and NodeType = 0 AND DeptId="+ cdeptSub[j].DEPTID;
SUYUAN.PBJCXT.Collection.A_DEVNODEINFO cnode = mf.GetNodeList(sqlstr);
for(int k=0;k<cnode.Count;k++)
{
TreeNode subsubNode = new TreeNode(cnode[k].NODENAME,cnode[k].NODETYPE + 1,cnode[k].NODETYPE + 1);
subsubNode.Tag = (Object)cnode[k];
GetChildNode(subsubNode);
subNode.Nodes.Add(subsubNode);
}
topNode.Nodes.Add(subNode);
}
tvNode.Nodes.Add(topNode);
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
tvNode.EndUpdate();
}

}
以上是绑定树的具体代码。其中还有一个递归：
private void GetChildNode(TreeNode node)
{
SUYUAN.PBJCXT.BLL.FormMain mf = new SUYUAN.PBJCXT.BLL.FormMain();
SUYUAN.PBJCXT.Entity.A_DEVNODEINFO dev = (SUYUAN.PBJCXT.Entity.A_DEVNODEINFO)node.Tag;
string sqlstr = " and PId="+ dev.CID;
SUYUAN.PBJCXT.Collection.A_DEVNODEINFO cnode = mf.GetNodeList(sqlstr);
for(int i=0;i<cnode.Count;i++)
{
TreeNode subNode = new TreeNode(cnode[i].NODENAME,cnode[i].NODETYPE + 1,cnode[i].NODETYPE + 1);
subNode.Tag = (Object)cnode[i];
GetChildNode(subNode);
node.Nodes.Add(subNode);
}
}

[huangguangdou]

study

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旁聽

[仓木泽]

up

[marvelstack]

人民币大写转化函数（C#版）
http://www.cnblogs.com/esshs/archive/2005/03/30/128318.aspx

[marvelstack]

以上矫正，楼主可以系统地看下面文章，会有所收获，
http://www.microsoft.com/china/MSDN/library/enterprisedevelopment/softwaredev/misMultithreading.mspx
http://www.microsoft.com/china/MSDN/library/architecture/AsynCallPattern.mspx

[alonepb]

阅

[仓木泽]

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