c# - 尽管未更新，但 Winforms 控件闪烁

Question

我有一个非常长时间运行的任务在我的程序后台异步运行。

在这样做的同时，有各种事件负责更新 GUI，利用 MethodInvoker 确保这些 GUI 更新始终在主线程上运行。

然而，尽管只有 ToolStripProgressBar 和 ToolStripLabel 被更改，但我的表单上的两个 ListBox 似乎经常被重绘以及导致它们闪烁。

知道为什么会这样吗？我没有在我的表单中的任何地方使用 Update()，所以我没有理由知道为什么非无效控件会闪烁。

我还验证了更新 ListBox 的事件不是被错误触发的。

进度步骤的 EventHandler 设置为以下函数:

    private void UpdateProgress()
    {
        if (InvokeRequired)
        {
            Invoke((MethodInvoker) UpdateProgress);
            return;
        }
        _lblProgress.Text = $"{_currentRow}/{_totalRows}";
        _pbarProgress.Increment(1);
    } 

这是不言自明的，如果它需要被调用，那么它会在更新toolStripStatusLabel 和toolStripProgressBar 之前这样做。

整个布局已经生成并由 WinForms 设计器处理，但这是相关代码:

namespace Stability_Report_Generator
{
   partial class MainForm
   {
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Windows Form Designer generated code

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this._tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
        this._lstMontrose = new System.Windows.Forms.ListBox();
        this._lstBLP = new System.Windows.Forms.ListBox();
        this._tableLayoutPanel2 = new System.Windows.Forms.TableLayoutPanel();
        this._groupBox1 = new System.Windows.Forms.GroupBox();
        this._rdoAllData = new System.Windows.Forms.RadioButton();
        this._rdoLastShift = new System.Windows.Forms.RadioButton();
        this._rdoLastDay = new System.Windows.Forms.RadioButton();
        this._tableLayoutPanel3 = new System.Windows.Forms.TableLayoutPanel();
        this._btnGenerate = new System.Windows.Forms.Button();
        this._btnView = new System.Windows.Forms.Button();
        this._btnClear = new System.Windows.Forms.Button();
        this._label1 = new System.Windows.Forms.Label();
        this._label2 = new System.Windows.Forms.Label();
        this._statusStrip1 = new System.Windows.Forms.StatusStrip();
        this._lblStatus = new System.Windows.Forms.ToolStripStatusLabel();
        this._lblProgress = new System.Windows.Forms.ToolStripStatusLabel();
        this._pbarProgress = new System.Windows.Forms.ToolStripProgressBar();
        this._menuStrip1 = new System.Windows.Forms.MenuStrip();
        this._fileToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._addFilesToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._bLpsoeToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._montroseSOEToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._editToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._removeFilesToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._bLpOnlyToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._montroseOnlyToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._preferencesToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._toolsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._viewGraphsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
        this._tableLayoutPanel1.SuspendLayout();
        this._tableLayoutPanel2.SuspendLayout();
        this._groupBox1.SuspendLayout();
        this._tableLayoutPanel3.SuspendLayout();
        this._statusStrip1.SuspendLayout();
        this._menuStrip1.SuspendLayout();
        this.SuspendLayout();
        // 
        // _tableLayoutPanel1
        // 
        this._tableLayoutPanel1.ColumnCount = 3;
        this._tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
        this._tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 33.33334F));
        this._tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 33.33334F));
        this._tableLayoutPanel1.Controls.Add(this._lstMontrose, 0, 1);
        this._tableLayoutPanel1.Controls.Add(this._lstBLP, 1, 1);
        this._tableLayoutPanel1.Controls.Add(this._tableLayoutPanel2, 2, 1);
        this._tableLayoutPanel1.Controls.Add(this._label1, 0, 0);
        this._tableLayoutPanel1.Controls.Add(this._label2, 1, 0);
        this._tableLayoutPanel1.Controls.Add(this._statusStrip1, 2, 2);
        this._tableLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;
        this._tableLayoutPanel1.Location = new System.Drawing.Point(20, 84);
        this._tableLayoutPanel1.Name = "_tableLayoutPanel1";
        this._tableLayoutPanel1.RowCount = 3;
        this._tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 20F));
        this._tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 100F));
        this._tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Absolute, 20F));
        this._tableLayoutPanel1.Size = new System.Drawing.Size(1090, 420);
        this._tableLayoutPanel1.TabIndex = 0;
        // 
        // _lstMontrose
        // 
        this._lstMontrose.Dock = System.Windows.Forms.DockStyle.Fill;
        this._lstMontrose.FormattingEnabled = true;
        this._lstMontrose.Location = new System.Drawing.Point(3, 23);
        this._lstMontrose.Name = "_lstMontrose";
        this._lstMontrose.Size = new System.Drawing.Size(357, 374);
        this._lstMontrose.TabIndex = 0;
        // 
        // _lstBLP
        // 
        this._lstBLP.Dock = System.Windows.Forms.DockStyle.Fill;
        this._lstBLP.FormattingEnabled = true;
        this._lstBLP.Location = new System.Drawing.Point(366, 23);
        this._lstBLP.Name = "_lstBLP";
        this._lstBLP.Size = new System.Drawing.Size(357, 374);
        this._lstBLP.TabIndex = 1;
        // 
        // _tableLayoutPanel2
        // 
        this._tableLayoutPanel2.ColumnCount = 1;
        this._tableLayoutPanel2.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
        this._tableLayoutPanel2.Controls.Add(this._groupBox1, 0, 1);
        this._tableLayoutPanel2.Controls.Add(this._tableLayoutPanel3, 0, 0);
        this._tableLayoutPanel2.Dock = System.Windows.Forms.DockStyle.Fill;
        this._tableLayoutPanel2.Location = new System.Drawing.Point(729, 23);
        this._tableLayoutPanel2.Name = "_tableLayoutPanel2";
        this._tableLayoutPanel2.RowCount = 2;
        this._tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 50F));
        this._tableLayoutPanel2.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 50F));
        this._tableLayoutPanel2.Size = new System.Drawing.Size(358, 374);
        this._tableLayoutPanel2.TabIndex = 2;
        // 
        // _groupBox1
        // 
        this._groupBox1.Controls.Add(this._rdoAllData);
        this._groupBox1.Controls.Add(this._rdoLastShift);
        this._groupBox1.Controls.Add(this._rdoLastDay);
        this._groupBox1.Dock = System.Windows.Forms.DockStyle.Fill;
        this._groupBox1.Location = new System.Drawing.Point(3, 190);
        this._groupBox1.Name = "_groupBox1";
        this._groupBox1.Size = new System.Drawing.Size(352, 181);
        this._groupBox1.TabIndex = 0;
        this._groupBox1.TabStop = false;
        this._groupBox1.Text = "Time Period";
        // 
        // _rdoAllData
        // 
        this._rdoAllData.AutoSize = true;
        this._rdoAllData.Location = new System.Drawing.Point(16, 68);
        this._rdoAllData.Name = "_rdoAllData";
        this._rdoAllData.Size = new System.Drawing.Size(62, 17);
        this._rdoAllData.TabIndex = 2;
        this._rdoAllData.TabStop = true;
        this._rdoAllData.Text = "All Data";
        this._rdoAllData.UseVisualStyleBackColor = true;
        // 
        // _rdoLastShift
        // 
        this._rdoLastShift.AutoSize = true;
        this._rdoLastShift.Location = new System.Drawing.Point(16, 44);
        this._rdoLastShift.Name = "_rdoLastShift";
        this._rdoLastShift.Size = new System.Drawing.Size(69, 17);
        this._rdoLastShift.TabIndex = 1;
        this._rdoLastShift.TabStop = true;
        this._rdoLastShift.Text = "Last Shift";
        this._rdoLastShift.UseVisualStyleBackColor = true;
        // 
        // _rdoLastDay
        // 
        this._rdoLastDay.AutoSize = true;
        this._rdoLastDay.Location = new System.Drawing.Point(16, 20);
        this._rdoLastDay.Name = "_rdoLastDay";
        this._rdoLastDay.Size = new System.Drawing.Size(67, 17);
        this._rdoLastDay.TabIndex = 0;
        this._rdoLastDay.TabStop = true;
        this._rdoLastDay.Text = "Last Day";
        this._rdoLastDay.UseVisualStyleBackColor = true;
        // 
        // _tableLayoutPanel3
        // 
        this._tableLayoutPanel3.ColumnCount = 1;
        this._tableLayoutPanel3.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
        this._tableLayoutPanel3.Controls.Add(this._btnGenerate, 0, 0);
        this._tableLayoutPanel3.Controls.Add(this._btnView, 0, 1);
        this._tableLayoutPanel3.Controls.Add(this._btnClear, 0, 2);
        this._tableLayoutPanel3.Dock = System.Windows.Forms.DockStyle.Fill;
        this._tableLayoutPanel3.Location = new System.Drawing.Point(3, 3);
        this._tableLayoutPanel3.Name = "_tableLayoutPanel3";
        this._tableLayoutPanel3.RowCount = 3;
        this._tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
        this._tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
        this._tableLayoutPanel3.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
        this._tableLayoutPanel3.Size = new System.Drawing.Size(352, 181);
        this._tableLayoutPanel3.TabIndex = 1;
        // 
        // _btnGenerate
        // 
        this._btnGenerate.Dock = System.Windows.Forms.DockStyle.Fill;
        this._btnGenerate.Enabled = false;
        this._btnGenerate.Location = new System.Drawing.Point(3, 3);
        this._btnGenerate.Name = "_btnGenerate";
        this._btnGenerate.Size = new System.Drawing.Size(346, 54);
        this._btnGenerate.TabIndex = 0;
        this._btnGenerate.Text = "Generate Report";
        this._btnGenerate.UseVisualStyleBackColor = true;
        this._btnGenerate.Click += new System.EventHandler(this.btnGenerate_Click);
        // 
        // _btnView
        // 
        this._btnView.Dock = System.Windows.Forms.DockStyle.Fill;
        this._btnView.Enabled = false;
        this._btnView.Location = new System.Drawing.Point(3, 63);
        this._btnView.Name = "_btnView";
        this._btnView.Size = new System.Drawing.Size(346, 54);
        this._btnView.TabIndex = 1;
        this._btnView.Text = "View Details";
        this._btnView.UseVisualStyleBackColor = true;
        // 
        // _btnClear
        // 
        this._btnClear.Dock = System.Windows.Forms.DockStyle.Fill;
        this._btnClear.Enabled = false;
        this._btnClear.Location = new System.Drawing.Point(3, 123);
        this._btnClear.Name = "_btnClear";
        this._btnClear.Size = new System.Drawing.Size(346, 55);
        this._btnClear.TabIndex = 2;
        this._btnClear.Text = "Reset";
        this._btnClear.UseVisualStyleBackColor = true;
        // 
        // _label1
        // 
        this._label1.AutoSize = true;
        this._label1.Dock = System.Windows.Forms.DockStyle.Fill;
        this._label1.Location = new System.Drawing.Point(3, 0);
        this._label1.Name = "_label1";
        this._label1.Size = new System.Drawing.Size(357, 20);
        this._label1.TabIndex = 3;
        this._label1.Text = "Montrose SOE Files";
        // 
        // _label2
        // 
        this._label2.AutoSize = true;
        this._label2.Dock = System.Windows.Forms.DockStyle.Fill;
        this._label2.Location = new System.Drawing.Point(366, 0);
        this._label2.Name = "_label2";
        this._label2.Size = new System.Drawing.Size(357, 20);
        this._label2.TabIndex = 4;
        this._label2.Text = "BLP SOE Files";
        // 
        // _statusStrip1
        // 
        this._statusStrip1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
        this._statusStrip1.BackColor = System.Drawing.Color.White;
        this._statusStrip1.Dock = System.Windows.Forms.DockStyle.None;
        this._statusStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this._lblStatus,
        this._lblProgress,
        this._pbarProgress});
        this._statusStrip1.Location = new System.Drawing.Point(936, 400);
        this._statusStrip1.Name = "_statusStrip1";
        this._statusStrip1.RightToLeft = System.Windows.Forms.RightToLeft.No;
        this._statusStrip1.Size = new System.Drawing.Size(154, 20);
        this._statusStrip1.SizingGrip = false;
        this._statusStrip1.Stretch = false;
        this._statusStrip1.TabIndex = 5;
        this._statusStrip1.Text = "statusStrip1";
        // 
        // _lblStatus
        // 
        this._lblStatus.Name = "_lblStatus";
        this._lblStatus.Size = new System.Drawing.Size(35, 15);
        this._lblStatus.Text = "Idle...";
        // 
        // _lblProgress
        // 
        this._lblProgress.Name = "_lblProgress";
        this._lblProgress.Size = new System.Drawing.Size(0, 15);
        // 
        // _pbarProgress
        // 
        this._pbarProgress.Name = "_pbarProgress";
        this._pbarProgress.Size = new System.Drawing.Size(100, 14);
        // 
        // _menuStrip1
        // 
        this._menuStrip1.BackColor = System.Drawing.Color.White;
        this._menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this._fileToolStripMenuItem,
        this._editToolStripMenuItem,
        this._toolsToolStripMenuItem});
        this._menuStrip1.Location = new System.Drawing.Point(20, 60);
        this._menuStrip1.Name = "_menuStrip1";
        this._menuStrip1.Size = new System.Drawing.Size(1090, 24);
        this._menuStrip1.TabIndex = 1;
        this._menuStrip1.Text = "menuStrip1";
        // 
        // _fileToolStripMenuItem
        // 
        this._fileToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this._addFilesToolStripMenuItem});
        this._fileToolStripMenuItem.Name = "_fileToolStripMenuItem";
        this._fileToolStripMenuItem.Size = new System.Drawing.Size(37, 20);
        this._fileToolStripMenuItem.Text = "File";
        // 
        // _addFilesToolStripMenuItem
        // 
        this._addFilesToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this._bLpsoeToolStripMenuItem,
        this._montroseSOEToolStripMenuItem});
        this._addFilesToolStripMenuItem.Name = "_addFilesToolStripMenuItem";
        this._addFilesToolStripMenuItem.Size = new System.Drawing.Size(122, 22);
        this._addFilesToolStripMenuItem.Text = "Add Files";
        // 
        // _bLpsoeToolStripMenuItem
        // 
        this._bLpsoeToolStripMenuItem.Name = "_bLpsoeToolStripMenuItem";
        this._bLpsoeToolStripMenuItem.Size = new System.Drawing.Size(149, 22);
        this._bLpsoeToolStripMenuItem.Text = "BLP SOE";
        // 
        // _montroseSOEToolStripMenuItem
        // 
        this._montroseSOEToolStripMenuItem.Name = "_montroseSOEToolStripMenuItem";
        this._montroseSOEToolStripMenuItem.Size = new System.Drawing.Size(149, 22);
        this._montroseSOEToolStripMenuItem.Text = "Montrose SOE";
        // 
        // _editToolStripMenuItem
        // 
        this._editToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this._removeFilesToolStripMenuItem,
        this._preferencesToolStripMenuItem});
        this._editToolStripMenuItem.Name = "_editToolStripMenuItem";
        this._editToolStripMenuItem.Size = new System.Drawing.Size(39, 20);
        this._editToolStripMenuItem.Text = "Edit";
        // 
        // _removeFilesToolStripMenuItem
        // 
        this._removeFilesToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this._bLpOnlyToolStripMenuItem,
        this._montroseOnlyToolStripMenuItem});
        this._removeFilesToolStripMenuItem.Name = "_removeFilesToolStripMenuItem";
        this._removeFilesToolStripMenuItem.Size = new System.Drawing.Size(143, 22);
        this._removeFilesToolStripMenuItem.Text = "Remove Files";
        // 
        // _bLpOnlyToolStripMenuItem
        // 
        this._bLpOnlyToolStripMenuItem.Name = "_bLpOnlyToolStripMenuItem";
        this._bLpOnlyToolStripMenuItem.Size = new System.Drawing.Size(153, 22);
        this._bLpOnlyToolStripMenuItem.Text = "BLP Only";
        // 
        // _montroseOnlyToolStripMenuItem
        // 
        this._montroseOnlyToolStripMenuItem.Name = "_montroseOnlyToolStripMenuItem";
        this._montroseOnlyToolStripMenuItem.Size = new System.Drawing.Size(153, 22);
        this._montroseOnlyToolStripMenuItem.Text = "Montrose Only";
        // 
        // _preferencesToolStripMenuItem
        // 
        this._preferencesToolStripMenuItem.Name = "_preferencesToolStripMenuItem";
        this._preferencesToolStripMenuItem.Size = new System.Drawing.Size(143, 22);
        this._preferencesToolStripMenuItem.Text = "Preferences";
        // 
        // _toolsToolStripMenuItem
        // 
        this._toolsToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
        this._viewGraphsToolStripMenuItem});
        this._toolsToolStripMenuItem.Name = "_toolsToolStripMenuItem";
        this._toolsToolStripMenuItem.Size = new System.Drawing.Size(48, 20);
        this._toolsToolStripMenuItem.Text = "Tools";
        // 
        // _viewGraphsToolStripMenuItem
        // 
        this._viewGraphsToolStripMenuItem.Name = "_viewGraphsToolStripMenuItem";
        this._viewGraphsToolStripMenuItem.Size = new System.Drawing.Size(139, 22);
        this._viewGraphsToolStripMenuItem.Text = "View Graphs";
        // 
        // MainForm
        // 
        this.AllowDrop = true;
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(1130, 524);
        this.Controls.Add(this._tableLayoutPanel1);
        this.Controls.Add(this._menuStrip1);
        this.MainMenuStrip = this._menuStrip1;
        this.Name = "MainForm";
        this.Text = "Stability Report Generator";
        this.DragDrop += new System.Windows.Forms.DragEventHandler(this.MainForm_DragDrop);
        this.DragEnter += new System.Windows.Forms.DragEventHandler(this.MainForm_DragEnter);
        this._tableLayoutPanel1.ResumeLayout(false);
        this._tableLayoutPanel1.PerformLayout();
        this._tableLayoutPanel2.ResumeLayout(false);
        this._groupBox1.ResumeLayout(false);
        this._groupBox1.PerformLayout();
        this._tableLayoutPanel3.ResumeLayout(false);
        this._statusStrip1.ResumeLayout(false);
        this._statusStrip1.PerformLayout();
        this._menuStrip1.ResumeLayout(false);
        this._menuStrip1.PerformLayout();
        this.ResumeLayout(false);
        this.PerformLayout();

    }

    #endregion

    private System.Windows.Forms.TableLayoutPanel _tableLayoutPanel1;
    private System.Windows.Forms.TableLayoutPanel _tableLayoutPanel2;
    private System.Windows.Forms.GroupBox _groupBox1;
    private System.Windows.Forms.RadioButton _rdoAllData;
    private System.Windows.Forms.RadioButton _rdoLastShift;
    private System.Windows.Forms.RadioButton _rdoLastDay;
    private System.Windows.Forms.TableLayoutPanel _tableLayoutPanel3;
    private System.Windows.Forms.Button _btnGenerate;
    private System.Windows.Forms.Button _btnView;
    private System.Windows.Forms.Button _btnClear;
    private System.Windows.Forms.MenuStrip _menuStrip1;
    private System.Windows.Forms.ToolStripMenuItem _fileToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _addFilesToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _bLpsoeToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _montroseSOEToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _editToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _removeFilesToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _bLpOnlyToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _montroseOnlyToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _preferencesToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _toolsToolStripMenuItem;
    private System.Windows.Forms.ToolStripMenuItem _viewGraphsToolStripMenuItem;
    private System.Windows.Forms.ListBox _lstMontrose;
    private System.Windows.Forms.ListBox _lstBLP;
    private System.Windows.Forms.Label _label1;
    private System.Windows.Forms.Label _label2;
    private System.Windows.Forms.StatusStrip _statusStrip1;
    private System.Windows.Forms.ToolStripStatusLabel _lblStatus;
    private System.Windows.Forms.ToolStripProgressBar _pbarProgress;
    private System.Windows.Forms.ToolStripStatusLabel _lblProgress;
}

Answer 1

您看到闪烁的原因是 ListBox.IntegralHeight 的副作用默认情况下为 true，这会触发调整大小算法，该算法会根据内容更改控件的大小，这显然会导致副作用。

---

当您更新进度条的速度快于每 100 毫秒一次时，就会出现此问题。更新速度快于立即导致闪烁，这可能与调用 SendMessage(NativeMethods.PBM_SETPOS, value, 0) 的进度条控件的渲染循环的内部实现有关或窗口消息循环本身的内部结构以及在幕后实现渲染的方式，很难说。

您可以选择通过将进度条增量与 _currentRow 增量分开来减慢进度条的更新，例如通过将进度条增量放入每 100 毫秒或什至更慢触发的其他定时器滴答处理程序中。

或者将 IntegralHeight 属性设置为 false，见下文。

this._lstMontrose.IntegralHeight = false;
this._lstBLP.IntegralHeight = false;

希望它能解决您的问题!