我的小程序工作得很好，读取带有3个配置值的xml文件，读取json-http页面等等。 现在有一件事我想做：在我的设置对话框中显示xml中的值。我得到了这个（Program.cs）：
using ...
//*****************************************************************************
namespace t2bl
{
abstract class TANSS2BL
{
public static NotifyIcon notico;
//==========================================================================
public static void Main(string[] astrArg)
{
ContextMenu cm;
MenuItem miCurr;
cm = new ContextMenu();
miCurr = new MenuItem();
miCurr.Index = 0;
miCurr.Text = "&Settings";
miCurr.Click += new System.EventHandler(SettingsClick);
cm.MenuItems.Add(miCurr);
miCurr = new MenuItem();
miCurr.Index = 1;
miCurr.Text = "Beenden";
miCurr.Click += new System.EventHandler(ExitClick);
cm.MenuItems.Add(miCurr);
notico = new NotifyIcon();
notico.Icon = new Icon("tanss.ico");
notico.Text = "TANSS Busylight Connector";
notico.Visible = true;
notico.ContextMenu = cm;
notico.DoubleClick += new EventHandler(NotifyIconDoubleClick);
BackgroundWorker bw = new BackgroundWorker();
bw.DoWork += new DoWorkEventHandler(bw_DoWork);
bw.RunWorkerAsync();
Application.Run();
}
public static void bw_DoWork(object sender, DoWorkEventArgs e)
{
XmlDocument doc = new XmlDocument();
doc.Load("C://bll.config.xml");
XmlNode xmlurl = doc.SelectSingleNode("/settings/url");
string url = xmlurl.FirstChild.Value;
XmlNode xmluid = doc.SelectSingleNode("/settings/userID");
string userid_string = xmluid.FirstChild.Value;
XmlNode xmlrefresh = doc.SelectSingleNode("/settings/refresh");
string refresh_string = xmlrefresh.FirstChild.Value;
int userid = Convert.ToInt32(userid_string);
int refresh = 1000 * (Convert.ToInt32(refresh_string));
var controller = new BusylightUcController();
while (true)
{
WebClient client = new WebClient();
var downloadString = client.DownloadString(url + "/module/busylight.php? user=" + userid);
JObject colors = JObject.Parse(downloadString);
//Console.WriteLine(colors["color"]); //Debug
var colorStatus = Convert.ToInt32(colors["color"]);
switch (colorStatus)
{
check the colors and set the light
}
Thread.Sleep(refresh);
GC.Collect();
}
}
//==========================================================================
protected static void ExitClick(Object sender, EventArgs e)
{
notico.Dispose();
Application.Exit();
}
//==========================================================================
protected static void SettingsClick(Object sender, EventArgs e)
{
/// <summary>
/// Der Haupteinstiegspunkt für die Anwendung.
/// </summary>
// This should open the "Settings"-Popup, containing 3 textboxes and a button to save them to xml.
SettingsDiag form1 = new SettingsDiag();
form1.Show();
}
//==========================================================================
protected static void NotifyIconDoubleClick(Object sender, EventArgs e)
{
// ...
}
}
}
另一方面（Form1.Designer.cs）：
namespace Settingsdialog
{
partial class SettingsDiag
{
/// <summary>
/// Erforderliche Designervariable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Verwendete Ressourcen bereinigen.
/// </summary>
/// <param name="disposing">True, wenn verwaltete Ressourcen gelöscht werden sollen; andernfalls False.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Vom Windows Form-Designer generierter Code
/// <summary>
/// Erforderliche Methode für die Designerunterstützung.
/// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(50, 28);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(163, 13);
this.label1.TabIndex = 0;
this.label1.Text = "TANSS Busylight connector v1.0";
this.label1.Click += new System.EventHandler(this.label1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(53, 65);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(159, 20);
this.textBox1.TabIndex = 1;
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(271, 117);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "TANSS Busylight connector";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
}
}
如何将值“url”，“userid_string”，“refresh_string”从backgroundworker void传递给“textbox1.Text =”输出？
谢谢！
答案 0 :(得分：0)
如果你想与你的表单沟通后台工作者的结果，你可以将你的表单定义为TANSS2BL的成员（并在Main中初始化它）。 然后在bw_DoWork中，您可以使用要显示为参数的信息在表单上调用方法。
由于bw_DoWork在另一个线程上，所以在设置textBox值之前不要忘记在表单中测试InvokeRequired和BeginInvoke。
答案 1 :(得分：0)
有很多方法可以实现这一点，你在其他答案中有一个，我可以建议另一个： 因为您的worker被设置为运行异步，所以您可以使用worker事件报告更新进度，然后在处理程序中更新文本框
bw.WorkerReportsProgress = true;
bw.ProgressChanged += (o, args) => { textBox1.Text = args.UserState.ToString();}
很明显，在bw.DoWork事件处理程序中，您需要报告将UserState作为要报告和更新的字符串值传递的进度操作，因此在事件处理程序中需要调用
bw.ReportProgress(0, "you value to report");
希望这会有所帮助