每个CheckListBox

Question

我对CheckListBox失去了理智，我试图将所有选中的项目都放入列表中。这是我使用的代码，带有用户界面上的按钮：

 public partial class formPCRBaseline : Form
{
    public formPCRBaseline(List<GetBaselineSectionTasks> m_objPCRCheck)
    {
        InitializeComponent();
        setDefaults(m_objPCRCheck);

    }

    private void setDefaults(List<GetBaselineSectionTasks> m_objPCRCheck)
    {
        checkedListBox.BackColor = Color.White;
        List<GetBaselineSectionTasks> m_objCheckeditem = new List<GetBaselineSectionTasks>();
        int i= 0;
        foreach (GetBaselineSectionTasks i_objPCRCheck in m_objPCRCheck)
        {
            checkedListBox.Items.Add(i_objPCRCheck.taskname);



        }

    }

    private void buttonConfirm_Click(object sender, EventArgs e)
    {
        this.DialogResult = DialogResult.OK;
        this.Close();

    }
    private void buttonClose_Click_1(object sender, EventArgs e)
    {
        this.DialogResult = DialogResult.Cancel;
        this.Close();
    }

    public List<GetBaselineSectionTasks> GetCheckedItems()
    {
        List<GetBaselineSectionTasks> m_objCheckeditem = new List<GetBaselineSectionTasks>();
        m_objCheckeditem.AddRange(checkedListBox.CheckedItems.OfType<GetBaselineSectionTasks>());




        return m_objCheckeditem;
    }


}
}

这里是我用来初始化组件的类：

   private void InitializeComponent()
    {
        this.buttonClose = new System.Windows.Forms.Button();
        this.buttonConfirm = new System.Windows.Forms.Button();
        this.checkedListBox = new System.Windows.Forms.CheckedListBox();
        this.SuspendLayout();
        // 
        // buttonClose
        // 
        this.buttonClose.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
        this.buttonClose.Font = new System.Drawing.Font("Microsoft Sans Serif", 8F);
        this.buttonClose.Location = new System.Drawing.Point(306, 299);
        this.buttonClose.Name = "buttonClose";
        this.buttonClose.Size = new System.Drawing.Size(100, 30);
        this.buttonClose.TabIndex = 0;
        this.buttonClose.Text = "Cancel";
        this.buttonClose.UseVisualStyleBackColor = true;
        this.buttonClose.Click += new System.EventHandler(this.buttonClose_Click_1);
        // 
        // buttonConfirm
        // 
        this.buttonConfirm.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
        this.buttonConfirm.Font = new System.Drawing.Font("Microsoft Sans Serif", 8F);
        this.buttonConfirm.Location = new System.Drawing.Point(192, 299);
        this.buttonConfirm.Name = "buttonConfirm";
        this.buttonConfirm.Size = new System.Drawing.Size(100, 30);
        this.buttonConfirm.TabIndex = 4;
        this.buttonConfirm.Text = "OK";
        this.buttonConfirm.UseVisualStyleBackColor = true;
        this.buttonConfirm.Click += new System.EventHandler(this.buttonConfirm_Click);
        // 
        // checkedListBox
        // 
        this.checkedListBox.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left) 
        | System.Windows.Forms.AnchorStyles.Right)));
        this.checkedListBox.Font = new System.Drawing.Font("Microsoft Sans Serif", 5.5F);
        this.checkedListBox.FormattingEnabled = true;
        this.checkedListBox.ImeMode = System.Windows.Forms.ImeMode.NoControl;
        this.checkedListBox.Location = new System.Drawing.Point(16, 41);
        this.checkedListBox.Name = "checkedListBox";
        this.checkedListBox.Size = new System.Drawing.Size(394, 244);
        this.checkedListBox.TabIndex = 5;
        // 
        // formPCRBaseline
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.AutoScroll = true;
        this.ClientSize = new System.Drawing.Size(418, 334);
        this.Controls.Add(this.checkedListBox);
        this.Controls.Add(this.buttonConfirm);
        this.Controls.Add(this.buttonClose);
        this.Name = "formPCRBaseline";
        this.ShowIcon = false;
        this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
        this.Text = "PMIS – Project Planning";
        this.ResumeLayout(false);

    }

    #endregion
    private System.Windows.Forms.Button buttonClose;
    private System.Windows.Forms.Button buttonConfirm;
    private System.Windows.Forms.CheckedListBox checkedListBox;

但是它不起作用，当我使用我的断点时，它到达了foreach，我已经选择了两个项目，但是没有< em>进入 知道我该怎么办？

Answer 1

您是否正在寻找CheckedItems / CheckedIndices属性？假设CheckListBox-checkedListBox包含GetBaselineSectionTasks个项目，即您按以下方式填写：

  checkedListBox.Items.Add(new GetBaselineSectionTasks(...));
  ... 
  checkedListBox.Items.Add(new GetBaselineSectionTasks(...));

你可以放

  List<GetBaselineSectionTasks> m_objCheckeditem = new List<GetBaselineSectionTasks();

  ...
 m_objCheckeditem.AddRange(checkedListBox.CheckedItems.OfType<GetBaselineSectionTasks>());

，或者如果您想一次创建一个列表：

 List<GetBaselineSectionTasks> result = checkedListBox.CheckedItems
   .OfType<GetBaselineSectionTasks>()
   .ToList(); 

编辑：如果正在使用string，即您这样填充checkedListBox：

 checkedListBox.Items.Add("Some Value");
 ... 
 checkedListBox.Items.Add("Some other value");

您可以遍历选中的项目，并在尝试找出对应的项目时

 foreach (int index in checkedListBox.CheckedIndices) {
   string taskName = Convert.ToString(checkedListBox[index]);

   // Now you have item index and item text (which is taskName). Let's try filling the list
   // We can try finding the item by string
   for (var item in m_objPCRCheck) {
     if (item.taskname == taskName) {
       m_objCheckeditem.Add(item);

       break; 
     } 
   }

   // Or (alternatively) you can trying to get index-th item:
   // m_objCheckeditem.Add(m_objPCRCheck[index]);
 }