C#委託事件如何更新UI的值
问题描述：
我想在一個委託事件中更新ui值,但是總是報錯,請幫我看看:
System.InvalidOperationException: '跨執行緒作業無效: 存取控制項 'tb_log' 時所使用的執行緒與建立控制項的執行緒不同。'
我的代碼如下:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MavenInstall
{
public partial class MavenInstall : Form
{
public delegate void OutDelegate(string txt);
public OutDelegate outDelegate;
public MavenInstall()
{
InitializeComponent();
tb_packaging.Text = "jar";
outDelegate = UpdateLog;
//tb_command.Text = "mvn install:install-file -DgroupId={0} -DartifactId={1} -Dversion={2} -Dpackaging={3} -Dfile={4}";
}
private void btn_select_Click(object sender, EventArgs e)
{
if (SelectJarFile.ShowDialog() == DialogResult.OK)
{
tb_file.Text = SelectJarFile.FileName;
}
}
private void btn_execute_Click(object sender, EventArgs e)
{
tb_log.Text = null;
foreach (Control control in gb_condition.Controls)
{
control.Enabled = false;
}
String cmd = String.Format(@"mvn install:install-file -DgroupId={0} -DartifactId={1} -Dversion={2} -Dpackaging={3} -Dfile={4}"
, tb_groupid.Text,tb_artifactid.Text
,tb_version.Text,tb_packaging.Text,tb_file.Text);
tb_command.Text = cmd;
Process process = new Process();
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.UseShellExecute = false; //是否使用操作系统shell启动
process.StartInfo.RedirectStandardInput = true;//接受来自调用程序的输入信息
process.StartInfo.RedirectStandardOutput = true;//由调用程序获取输出信息
process.StartInfo.RedirectStandardError = true;//重定向标准错误输出
process.StartInfo.CreateNoWindow = true;//不显示程序窗口
process.Start();//启动程序
process.OutputDataReceived += new DataReceivedEventHandler(OutputDataHandler);
process.BeginOutputReadLine();
process.StandardInput.WriteLine(cmd);
process.StandardInput.AutoFlush = true;
process.StandardInput.WriteLine("exit");
process.WaitForExit();//等待程序执行完退出进程
foreach (Control control in gb_condition.Controls)
{
control.Enabled = true;
}
process.Close();
}
private void OutputDataHandler(object sender, DataReceivedEventArgs e)
{
if (!string.IsNullOrEmpty(e.Data)) {
//UpdateLog(e.Data);
outDelegate.Invoke(e.Data);
}
}
private void UpdateLog(string txt)
{
//if (tb_log.InvokeRequired)
//{
// tb_log.Invoke(outDelegate, txt);
//}
//else
//{
// this.tb_log.Text += txt + "\r\n";
//}
this.tb_log.Text += txt + "\r\n";
}
private void btn_clear_Click(object sender, EventArgs e)
{
tb_groupid.Text = null;
tb_artifactid.Text = null;
tb_version.Text = null;
tb_packaging.Text = null;
tb_file.Text = null;
tb_command.Text = null;
tb_log.Text = null;
}
}
}
design文件
namespace MavenInstall
{
partial class MavenInstall
{
/// <summary>
/// 設計工具所需的變數。
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// 清除任何使用中的資源。
/// </summary>
/// <param name="disposing">如果應該處置受控資源則為 true，否則為 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form 設計工具產生的程式碼
/// <summary>
/// 此為設計工具支援所需的方法 - 請勿使用程式碼編輯器修改
/// 這個方法的內容。
/// </summary>
private void InitializeComponent()
{
this.splitContainer1 = new System.Windows.Forms.SplitContainer();
this.panel1 = new System.Windows.Forms.Panel();
this.btn_clear = new System.Windows.Forms.Button();
this.btn_execute = new System.Windows.Forms.Button();
this.gb_condition = new System.Windows.Forms.GroupBox();
this.tb_command = new System.Windows.Forms.TextBox();
this.btn_select = new System.Windows.Forms.Button();
this.lb_Command = new System.Windows.Forms.Label();
this.tb_file = new System.Windows.Forms.TextBox();
this.lb_File = new System.Windows.Forms.Label();
this.tb_packaging = new System.Windows.Forms.TextBox();
this.lb_Packaging = new System.Windows.Forms.Label();
this.tb_version = new System.Windows.Forms.TextBox();
this.lb_Version = new System.Windows.Forms.Label();
this.tb_artifactid = new System.Windows.Forms.TextBox();
this.lb_ArtifactId = new System.Windows.Forms.Label();
this.tb_groupid = new System.Windows.Forms.TextBox();
this.lb_GroupId = new System.Windows.Forms.Label();
this.groupBox1 = new System.Windows.Forms.GroupBox();
this.tb_log = new System.Windows.Forms.TextBox();
this.SelectJarFile = new System.Windows.Forms.OpenFileDialog();
((System.ComponentModel.ISupportInitialize)(this.splitContainer1)).BeginInit();
this.splitContainer1.Panel1.SuspendLayout();
this.splitContainer1.Panel2.SuspendLayout();
this.splitContainer1.SuspendLayout();
this.panel1.SuspendLayout();
this.gb_condition.SuspendLayout();
this.groupBox1.SuspendLayout();
this.SuspendLayout();
//
// splitContainer1
//
this.splitContainer1.Dock = System.Windows.Forms.DockStyle.Fill;
this.splitContainer1.Location = new System.Drawing.Point(0, 0);
this.splitContainer1.Margin = new System.Windows.Forms.Padding(4);
this.splitContainer1.Name = "splitContainer1";
//
// splitContainer1.Panel1
//
this.splitContainer1.Panel1.Controls.Add(this.panel1);
this.splitContainer1.Panel1.Controls.Add(this.gb_condition);
//
// splitContainer1.Panel2
//
this.splitContainer1.Panel2.Controls.Add(this.groupBox1);
this.splitContainer1.Size = new System.Drawing.Size(1067, 372);
this.splitContainer1.SplitterDistance = 348;
this.splitContainer1.SplitterWidth = 5;
this.splitContainer1.TabIndex = 0;
//
// panel1
//
this.panel1.Controls.Add(this.btn_clear);
this.panel1.Controls.Add(this.btn_execute);
this.panel1.Dock = System.Windows.Forms.DockStyle.Bottom;
this.panel1.Location = new System.Drawing.Point(0, 328);
this.panel1.Margin = new System.Windows.Forms.Padding(4);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(348, 44);
this.panel1.TabIndex = 1;
//
// btn_clear
//
this.btn_clear.Location = new System.Drawing.Point(240, 8);
this.btn_clear.Margin = new System.Windows.Forms.Padding(4);
this.btn_clear.Name = "btn_clear";
this.btn_clear.Size = new System.Drawing.Size(100, 29);
this.btn_clear.TabIndex = 0;
this.btn_clear.Text = "Clear(&C)";
this.btn_clear.UseVisualStyleBackColor = true;
this.btn_clear.Click += new System.EventHandler(this.btn_clear_Click);
//
// btn_execute
//
this.btn_execute.Location = new System.Drawing.Point(8, 8);
this.btn_execute.Margin = new System.Windows.Forms.Padding(4);
this.btn_execute.Name = "btn_execute";
this.btn_execute.Size = new System.Drawing.Size(97, 29);
this.btn_execute.TabIndex = 0;
this.btn_execute.Text = "Execute(&E)";
this.btn_execute.UseVisualStyleBackColor = true;
this.btn_execute.Click += new System.EventHandler(this.btn_execute_Click);
//
// gb_condition
//
this.gb_condition.Controls.Add(this.tb_command);
this.gb_condition.Controls.Add(this.btn_select);
this.gb_condition.Controls.Add(this.lb_Command);
this.gb_condition.Controls.Add(this.tb_file);
this.gb_condition.Controls.Add(this.lb_File);
this.gb_condition.Controls.Add(this.tb_packaging);
this.gb_condition.Controls.Add(this.lb_Packaging);
this.gb_condition.Controls.Add(this.tb_version);
this.gb_condition.Controls.Add(this.lb_Version);
this.gb_condition.Controls.Add(this.tb_artifactid);
this.gb_condition.Controls.Add(this.lb_ArtifactId);
this.gb_condition.Controls.Add(this.tb_groupid);
this.gb_condition.Controls.Add(this.lb_GroupId);
this.gb_condition.Dock = System.Windows.Forms.DockStyle.Fill;
this.gb_condition.Location = new System.Drawing.Point(0, 0);
this.gb_condition.Margin = new System.Windows.Forms.Padding(4);
this.gb_condition.Name = "gb_condition";
this.gb_condition.Padding = new System.Windows.Forms.Padding(4);
this.gb_condition.Size = new System.Drawing.Size(348, 372);
this.gb_condition.TabIndex = 0;
this.gb_condition.TabStop = false;
this.gb_condition.Text = "Condition";
//
// tb_command
//
this.tb_command.Location = new System.Drawing.Point(92, 196);
this.tb_command.Margin = new System.Windows.Forms.Padding(4);
this.tb_command.Multiline = true;
this.tb_command.Name = "tb_command";
this.tb_command.ReadOnly = true;
this.tb_command.Size = new System.Drawing.Size(247, 115);
this.tb_command.TabIndex = 1;
//
// btn_select
//
this.btn_select.Location = new System.Drawing.Point(253, 161);
this.btn_select.Margin = new System.Windows.Forms.Padding(4);
this.btn_select.Name = "btn_select";
this.btn_select.Size = new System.Drawing.Size(87, 29);
this.btn_select.TabIndex = 0;
this.btn_select.Text = "Select(&S)";
this.btn_select.UseVisualStyleBackColor = true;
this.btn_select.Click += new System.EventHandler(this.btn_select_Click);
//
// lb_Command
//
this.lb_Command.AutoSize = true;
this.lb_Command.Location = new System.Drawing.Point(12, 202);
this.lb_Command.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
this.lb_Command.Name = "lb_Command";
this.lb_Command.Size = new System.Drawing.Size(69, 15);
this.lb_Command.TabIndex = 0;
this.lb_Command.Text = "Command:";
//
// tb_file
//
this.tb_file.Location = new System.Drawing.Point(92, 161);
this.tb_file.Margin = new System.Windows.Forms.Padding(4);
this.tb_file.Name = "tb_file";
this.tb_file.Size = new System.Drawing.Size(152, 25);
this.tb_file.TabIndex = 1;
//
// lb_File
//
this.lb_File.AutoSize = true;
this.lb_File.Location = new System.Drawing.Point(55, 168);
this.lb_File.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
this.lb_File.Name = "lb_File";
this.lb_File.Size = new System.Drawing.Size(33, 15);
this.lb_File.TabIndex = 0;
this.lb_File.Text = "File:";
//
// tb_packaging
//
this.tb_packaging.Location = new System.Drawing.Point(92, 126);
this.tb_packaging.Margin = new System.Windows.Forms.Padding(4);
this.tb_packaging.Name = "tb_packaging";
this.tb_packaging.Size = new System.Drawing.Size(247, 25);
this.tb_packaging.TabIndex = 1;
//
// lb_Packaging
//
this.lb_Packaging.AutoSize = true;
this.lb_Packaging.Location = new System.Drawing.Point(13, 132);
this.lb_Packaging.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
this.lb_Packaging.Name = "lb_Packaging";
this.lb_Packaging.Size = new System.Drawing.Size(69, 15);
this.lb_Packaging.TabIndex = 0;
this.lb_Packaging.Text = "Packaging:";
//
// tb_version
//
this.tb_version.Location = new System.Drawing.Point(92, 91);
this.tb_version.Margin = new System.Windows.Forms.Padding(4);
this.tb_version.Name = "tb_version";
this.tb_version.Size = new System.Drawing.Size(247, 25);
this.tb_version.TabIndex = 1;
//
// lb_Version
//
this.lb_Version.AutoSize = true;
this.lb_Version.Location = new System.Drawing.Point(29, 98);
this.lb_Version.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
this.lb_Version.Name = "lb_Version";
this.lb_Version.Size = new System.Drawing.Size(55, 15);
this.lb_Version.TabIndex = 0;
this.lb_Version.Text = "Version:";
//
// tb_artifactid
//
this.tb_artifactid.Location = new System.Drawing.Point(92, 56);
this.tb_artifactid.Margin = new System.Windows.Forms.Padding(4);
this.tb_artifactid.Name = "tb_artifactid";
this.tb_artifactid.Size = new System.Drawing.Size(247, 25);
this.tb_artifactid.TabIndex = 1;
//
// lb_ArtifactId
//
this.lb_ArtifactId.AutoSize = true;
this.lb_ArtifactId.Location = new System.Drawing.Point(17, 62);
this.lb_ArtifactId.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
this.lb_ArtifactId.Name = "lb_ArtifactId";
this.lb_ArtifactId.Size = new System.Drawing.Size(67, 15);
this.lb_ArtifactId.TabIndex = 0;
this.lb_ArtifactId.Text = "ArtifactId:";
//
// tb_groupid
//
this.tb_groupid.Location = new System.Drawing.Point(92, 21);
this.tb_groupid.Margin = new System.Windows.Forms.Padding(4);
this.tb_groupid.Name = "tb_groupid";
this.tb_groupid.Size = new System.Drawing.Size(247, 25);
this.tb_groupid.TabIndex = 1;
//
// lb_GroupId
//
this.lb_GroupId.AutoSize = true;
this.lb_GroupId.Location = new System.Drawing.Point(24, 26);
this.lb_GroupId.Margin = new System.Windows.Forms.Padding(4, 0, 4, 0);
this.lb_GroupId.Name = "lb_GroupId";
this.lb_GroupId.Size = new System.Drawing.Size(59, 15);
this.lb_GroupId.TabIndex = 0;
this.lb_GroupId.Text = "GroupId:";
//
// groupBox1
//
this.groupBox1.Controls.Add(this.tb_log);
this.groupBox1.Dock = System.Windows.Forms.DockStyle.Fill;
this.groupBox1.Location = new System.Drawing.Point(0, 0);
this.groupBox1.Margin = new System.Windows.Forms.Padding(4);
this.groupBox1.Name = "groupBox1";
this.groupBox1.Padding = new System.Windows.Forms.Padding(4);
this.groupBox1.Size = new System.Drawing.Size(714, 372);
this.groupBox1.TabIndex = 0;
this.groupBox1.TabStop = false;
this.groupBox1.Text = "Log";
//
// tb_log
//
this.tb_log.Dock = System.Windows.Forms.DockStyle.Fill;
this.tb_log.Location = new System.Drawing.Point(4, 22);
this.tb_log.Margin = new System.Windows.Forms.Padding(4);
this.tb_log.Multiline = true;
this.tb_log.Name = "tb_log";
this.tb_log.ReadOnly = true;
this.tb_log.ScrollBars = System.Windows.Forms.ScrollBars.Both;
this.tb_log.Size = new System.Drawing.Size(706, 346);
this.tb_log.TabIndex = 0;
//
// SelectJarFile
//
this.SelectJarFile.FileName = "SelectJarFile";
//
// MavenInstall
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(1067, 372);
this.Controls.Add(this.splitContainer1);
this.Margin = new System.Windows.Forms.Padding(4);
this.Name = "MavenInstall";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "MavenInstall";
this.splitContainer1.Panel1.ResumeLayout(false);
this.splitContainer1.Panel2.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.splitContainer1)).EndInit();
this.splitContainer1.ResumeLayout(false);
this.panel1.ResumeLayout(false);
this.gb_condition.ResumeLayout(false);
this.gb_condition.PerformLayout();
this.groupBox1.ResumeLayout(false);
this.groupBox1.PerformLayout();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.SplitContainer splitContainer1;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Button btn_clear;
private System.Windows.Forms.Button btn_execute;
private System.Windows.Forms.GroupBox gb_condition;
private System.Windows.Forms.TextBox tb_command;
private System.Windows.Forms.Button btn_select;
private System.Windows.Forms.Label lb_Command;
private System.Windows.Forms.TextBox tb_file;
private System.Windows.Forms.Label lb_File;
private System.Windows.Forms.TextBox tb_packaging;
private System.Windows.Forms.Label lb_Packaging;
private System.Windows.Forms.TextBox tb_version;
private System.Windows.Forms.Label lb_Version;
private System.Windows.Forms.TextBox tb_artifactid;
private System.Windows.Forms.Label lb_ArtifactId;
private System.Windows.Forms.TextBox tb_groupid;
private System.Windows.Forms.Label lb_GroupId;
private System.Windows.Forms.GroupBox groupBox1;
private System.Windows.Forms.TextBox tb_log;
private System.Windows.Forms.OpenFileDialog SelectJarFile;
}
}
答
private void UpdateLog(string txt)
{
this.Invoke(new delegate() {
this.tb_log.Text += txt + "\r\n";
});
}