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C# 在windows窗体应用程序中填充组合框的后台工作程序

c# winforms active-directory

C# 在windows窗体应用程序中填充组合框的后台工作程序,c#,winforms,active-directory,backgroundworker,C#,Winforms,Active Directory,Backgroundworker,我想在我的windows应用程序中实现后台工作程序。 目前，我正在使用按钮事件处理程序加载包含数据的组合框。由于查询挂起用户界面，我想实现后台工作程序，因为查询在不同的线程中运行。我从未在我的任何应用程序中使用过此后台工作程序。我对此做了一些研究，但仍然无法实现。任何帮助或建议都将不胜感激 这就是我的按钮事件处理程序的外观 private void button6_Click(object sender, EventArgs e) { if (comboB

我想在我的windows应用程序中实现后台工作程序。 目前，我正在使用按钮事件处理程序加载包含数据的组合框。由于查询挂起用户界面，我想实现后台工作程序，因为查询在不同的线程中运行。我从未在我的任何应用程序中使用过此后台工作程序。我对此做了一些研究，但仍然无法实现。任何帮助或建议都将不胜感激

这就是我的按钮事件处理程序的外观

private void button6_Click(object sender, EventArgs e)
        {
            if (comboBox1.SelectedItem.ToString() == "All")
            {

               findAllUser();

            }

            else
            {
                //Do Something!!!

            }
        }
findAllUser（）将从active directory中获取所有用户，这通常需要时间，并使UI无响应。findAllUser（）的代码如下所示

public void findAllUser()
    {
        System.DirectoryServices.DirectoryEntry entry = new System.DirectoryServices.DirectoryEntry("LDAP://DC=xyz, DC=com");
        System.DirectoryServices.DirectorySearcher mySearcher = new System.DirectoryServices.DirectorySearcher(entry);
        mySearcher.Filter = "(&(objectClass=user))";

        foreach (System.DirectoryServices.SearchResult resEnt in mySearcher.FindAll())
        {
            try
            {
                System.DirectoryServices.DirectoryEntry de = resEnt.GetDirectoryEntry();
                comboBox2.Items.Add(de.Properties["GivenName"].Value.ToString() + " " + de.Properties["sn"].Value.ToString() + " " + "[" + de.Properties["sAMAccountName"].Value.ToString() + "]");
            }

            catch (Exception)
            {
                // MessageBox.Show(e.ToString());
            }
        }

    }

    Thread thread = new Thread(() =>
    {
        // do process here
    });
    thread.IsBackground = true;
    thread.Start();
下面是后台工作人员现在的样子..全部为空

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {


        }

        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {


        }

        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {

        }
任何建议如何实现上述代码，以便后台工作人员使用active directory用户列表填充combobox2

将您的代码放在后台工作上。但我建议您使用线程或任务并行库

如果您使用的是.NET4.0，请使用TPL

您可以这样做：

    Task runner = new Task(() =>
    {
        // do process here
    });
    runner.Start();

private List<string> items;
public void findAllUser()
{
    items = new List<string>();

    System.DirectoryServices.DirectoryEntry entry =
        new System.DirectoryServices.DirectoryEntry("LDAP://DC=xyz, DC=com");
    System.DirectoryServices.DirectorySearcher mySearcher =
        new System.DirectoryServices.DirectorySearcher(entry);
    mySearcher.Filter = "(&(objectClass=user))";

    foreach (System.DirectoryServices.SearchResult resEnt in mySearcher.FindAll())
    {
        try
        {
            System.DirectoryServices.DirectoryEntry de = resEnt.GetDirectoryEntry();
            items.Add(de.Properties["GivenName"].Value.ToString() + " " +
                de.Properties["sn"].Value.ToString() + " " + "[" +
                de.Properties["sAMAccountName"].Value.ToString() + "]");
        }

        catch (Exception)
        {
            // MessageBox.Show(e.ToString());
        }
    }
}

public void findAllUser()
{
    const int ExpectedTime = 30000; // 30,000 milliseconds
    // stopwatch keeps track of elapsed time
    Stopwatch sw = Stopwatch.StartNew();
    // Create a timer that reports progress at 500 ms intervals
    System.Timers.Timer UpdateTimer;
    UpdateTimer = new System.Threading.Timer(
        null,
        {
            var percentComplete = (100 * sw.ElapsedMilliseconds) / ExpectedTime;
            if (percentComplete > 100) percentComplete = 100;

            ReportProgress(percentComplete);

            // Update again in 500 ms if not already at max
            if (percentComplete < 100)
                UpdateTimer.Change(500, Timeout.Infinite);
        }, 500, Timeout.Infinite);
    items = new List<string>();

    // rest of findAllUser here

    // dispose of the timer.
    UpdateTimer.Dispose();
}
当然，如果您使用的是较旧的框架，请像这样使用线程

public void findAllUser()
    {
        System.DirectoryServices.DirectoryEntry entry = new System.DirectoryServices.DirectoryEntry("LDAP://DC=xyz, DC=com");
        System.DirectoryServices.DirectorySearcher mySearcher = new System.DirectoryServices.DirectorySearcher(entry);
        mySearcher.Filter = "(&(objectClass=user))";

        foreach (System.DirectoryServices.SearchResult resEnt in mySearcher.FindAll())
        {
            try
            {
                System.DirectoryServices.DirectoryEntry de = resEnt.GetDirectoryEntry();
                comboBox2.Items.Add(de.Properties["GivenName"].Value.ToString() + " " + de.Properties["sn"].Value.ToString() + " " + "[" + de.Properties["sAMAccountName"].Value.ToString() + "]");
            }

            catch (Exception)
            {
                // MessageBox.Show(e.ToString());
            }
        }

    }

    Thread thread = new Thread(() =>
    {
        // do process here
    });
    thread.IsBackground = true;
    thread.Start();
阅读有关和的更多信息。

将您的代码放在backgroundWorker1\u DoWork上。但我建议您使用线程或任务并行库

如果您使用的是.NET4.0，请使用TPL

您可以这样做：

    Task runner = new Task(() =>
    {
        // do process here
    });
    runner.Start();

private List<string> items;
public void findAllUser()
{
    items = new List<string>();

    System.DirectoryServices.DirectoryEntry entry =
        new System.DirectoryServices.DirectoryEntry("LDAP://DC=xyz, DC=com");
    System.DirectoryServices.DirectorySearcher mySearcher =
        new System.DirectoryServices.DirectorySearcher(entry);
    mySearcher.Filter = "(&(objectClass=user))";

    foreach (System.DirectoryServices.SearchResult resEnt in mySearcher.FindAll())
    {
        try
        {
            System.DirectoryServices.DirectoryEntry de = resEnt.GetDirectoryEntry();
            items.Add(de.Properties["GivenName"].Value.ToString() + " " +
                de.Properties["sn"].Value.ToString() + " " + "[" +
                de.Properties["sAMAccountName"].Value.ToString() + "]");
        }

        catch (Exception)
        {
            // MessageBox.Show(e.ToString());
        }
    }
}

public void findAllUser()
{
    const int ExpectedTime = 30000; // 30,000 milliseconds
    // stopwatch keeps track of elapsed time
    Stopwatch sw = Stopwatch.StartNew();
    // Create a timer that reports progress at 500 ms intervals
    System.Timers.Timer UpdateTimer;
    UpdateTimer = new System.Threading.Timer(
        null,
        {
            var percentComplete = (100 * sw.ElapsedMilliseconds) / ExpectedTime;
            if (percentComplete > 100) percentComplete = 100;

            ReportProgress(percentComplete);

            // Update again in 500 ms if not already at max
            if (percentComplete < 100)
                UpdateTimer.Change(500, Timeout.Infinite);
        }, 500, Timeout.Infinite);
    items = new List<string>();

    // rest of findAllUser here

    // dispose of the timer.
    UpdateTimer.Dispose();
}
当然，如果您使用的是较旧的框架，请像这样使用线程

public void findAllUser()
    {
        System.DirectoryServices.DirectoryEntry entry = new System.DirectoryServices.DirectoryEntry("LDAP://DC=xyz, DC=com");
        System.DirectoryServices.DirectorySearcher mySearcher = new System.DirectoryServices.DirectorySearcher(entry);
        mySearcher.Filter = "(&(objectClass=user))";

        foreach (System.DirectoryServices.SearchResult resEnt in mySearcher.FindAll())
        {
            try
            {
                System.DirectoryServices.DirectoryEntry de = resEnt.GetDirectoryEntry();
                comboBox2.Items.Add(de.Properties["GivenName"].Value.ToString() + " " + de.Properties["sn"].Value.ToString() + " " + "[" + de.Properties["sAMAccountName"].Value.ToString() + "]");
            }

            catch (Exception)
            {
                // MessageBox.Show(e.ToString());
            }
        }

    }

    Thread thread = new Thread(() =>
    {
        // do process here
    });
    thread.IsBackground = true;
    thread.Start();
阅读有关和的更多信息。

您可以使用以下逻辑为代码实现后台工作程序

var startListenerWorker = new BackgroundWorker();
                startListenerWorker.DoWork += new DoWorkEventHandler(this.StartListenerDoWork);
                startListenerWorker.RunWorkerAsync();


private void StartListenerDoWork(object sender, DoWorkEventArgs doWorkEventArgs)
        {

// Your logic to load comboBox will go here for running your query
}
您还可以实现线程，使逻辑在单独的线程上运行。

您可以使用下面的逻辑为代码实现后台工作程序

var startListenerWorker = new BackgroundWorker();
                startListenerWorker.DoWork += new DoWorkEventHandler(this.StartListenerDoWork);
                startListenerWorker.RunWorkerAsync();


private void StartListenerDoWork(object sender, DoWorkEventArgs doWorkEventArgs)
        {

// Your logic to load comboBox will go here for running your query
}
您还可以实现线程，使逻辑在单独的线程上运行。

使用BackgroundWorker很方便，因为它自动调用UI线程中的ProgressChanged和RunworkerCompleted事件处理程序。你可以像下面那样使用它

    private void AddItem(DirectoryEntry de)
    {
        comboBox2.Items.Add(de.Properties["GivenName"].Value.ToString() + " " + de.Properties["sn"].Value.ToString() + " " + "[" + de.Properties["sAMAccountName"].Value.ToString() + "]");
    }

    private void button6_Click(object sender, EventArgs e)
    {
        if (comboBox1.SelectedItem.ToString() == "All")
        {

            this.backgroundWorker1.RunWorkerAsync();

        }

        else
        {
            //Do Something!!!

        }
    }

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        // Bind to the users container.
        DirectoryEntry entry = new DirectoryEntry("LDAP://CN=xyz,DC=com");
        // Create a DirectorySearcher object.
        DirectorySearcher mySearcher = new DirectorySearcher(entry);

        try
        {
            // Create a SearchResultCollection object to hold a collection of SearchResults
            // returned by the FindAll method.
            SearchResultCollection result = mySearcher.FindAll();
            int count = result.Count;

            for(int i = 0; i < count; i++)
            {
                SearchResult resEnt = result[i];

                try
                {
                    DirectoryEntry de = resEnt.GetDirectoryEntry();

                    BeginInvoke(new Action<DirectoryEntry>(AddItem), de);
                }
                catch (Exception)
                {
                    // MessageBox.Show(e.ToString());
                }

                this.backgroundWorker1.ReportProgress(i / count);
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        this.progressBar1.Value = e.ProgressPercentage;
    }

    private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        this.progressBar1.Value = 100;
    }

private void AddItem（目录条目de）
{
comboBox2.Items.Add（de.Properties[“GivenName”].Value.ToString（）+“”+de.Properties[“sn”].Value.ToString（）+“”+“[”+de.Properties[“sAMAccountName”].Value.ToString（）+“]”）；
}
私有无效按钮6_单击（对象发送者，事件参数e）
{
如果（comboBox1.SelectedItem.ToString（）=“全部”）
{
this.backgroundWorker1.RunWorkerAsync（）；
}
其他的
{
//做点什么！！！
}
}
私有void backgroundWorker1\u DoWork（对象发送方，DoWorkEventArgs e）
{
//绑定到用户容器。
DirectoryEntry=新的DirectoryEntry（“LDAP://CN=xyz，DC=com”）；
//创建DirectorySearcher对象。
DirectorySearcher mySearcher=新的DirectorySearcher（条目）；
尝试
{
//创建SearchResultCollection对象以保存SearchResults集合
//由FindAll方法返回。
SearchResultCollection result=mySearcher.FindAll（）；
int count=result.count；
for（int i=0；i
使用BackgroundWorker很方便，因为它自动调用UI线程中的ProgressChanged和RunworkerCompleted事件处理程序。你可以像下面那样使用它

    private void AddItem(DirectoryEntry de)
    {
        comboBox2.Items.Add(de.Properties["GivenName"].Value.ToString() + " " + de.Properties["sn"].Value.ToString() + " " + "[" + de.Properties["sAMAccountName"].Value.ToString() + "]");
    }

    private void button6_Click(object sender, EventArgs e)
    {
        if (comboBox1.SelectedItem.ToString() == "All")
        {

            this.backgroundWorker1.RunWorkerAsync();

        }

        else
        {
            //Do Something!!!

        }
    }

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        // Bind to the users container.
        DirectoryEntry entry = new DirectoryEntry("LDAP://CN=xyz,DC=com");
        // Create a DirectorySearcher object.
        DirectorySearcher mySearcher = new DirectorySearcher(entry);

        try
        {
            // Create a SearchResultCollection object to hold a collection of SearchResults
            // returned by the FindAll method.
            SearchResultCollection result = mySearcher.FindAll();
            int count = result.Count;

            for(int i = 0; i < count; i++)
            {
                SearchResult resEnt = result[i];

                try
                {
                    DirectoryEntry de = resEnt.GetDirectoryEntry();

                    BeginInvoke(new Action<DirectoryEntry>(AddItem), de);
                }
                catch (Exception)
                {
                    // MessageBox.Show(e.ToString());
                }

                this.backgroundWorker1.ReportProgress(i / count);
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        this.progressBar1.Value = e.ProgressPercentage;
    }

    private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        this.progressBar1.Value = 100;
    }

private void AddItem（目录条目de）
{
comboBox2.Items.Add（de.Properties[“GivenName”].Value.ToString（）+“”+de.Properties[“sn”].Value.ToString（）+“”+“[”+de.Properties[“sAMAccountName”].Value.ToString（）+“]”）；
}
私有无效按钮6_单击（对象发送者，事件参数e）
{
如果（comboBox1.SelectedItem.ToString（）=“全部”）
{
this.backgroundWorker1.RunWorkerAsync（）；
}
其他的
{
//做点什么！！！
}
}
私有void backgroundWorker1\u DoWork（对象发送方，DoWorkEventArgs e）
{
//绑定到用户容器。
DirectoryEntry=新的DirectoryEntry（“LDAP://CN=xyz，DC=com”）；
//创建DirectorySearcher对象。
DirectorySearcher mySearcher=新的DirectorySearcher（条目）；
尝试
{
//创建SearchResultCollection对象以保存SearchResults集合
//由FindAll方法返回。
SearchResultCollection result=mySearcher.FindAll（）；
int count=result.count；
for（int i=0；i