一段时间以来,我一直在使用自定义复选框控件并发布了此问题...看来问题与事件无关。
自定义控件是一个带有复选框的组框。当复选框为 false 时,应禁用所有组控件。这听起来很简单,但问题是当内部控件失去焦点时,会触发检查的更改事件。
经过更多的挖掘,我想我已经将其范围缩小到已检查属性与另一个对象的绑定。包含绑定时,它工作不正确,但删除绑定后,一切都按预期工作。
现在我不确定如何解决这个问题。
任何人都可以帮忙吗?
这是我的测试应用程序中的一些代码-
表格:
表格代码:
public partial class Form1 : Form
{
TestProperties m_TP;
public Form1()
{
// Create instance of TestProperties
m_TP = new TestProperties();
InitializeComponent();
BindControls();
}
private void BindControls()
{
// Bind the values to from the controls in the group to the properties class
// When the line below is commented out the control behaves normally
//this.checkedGroupBox1.DataBindings.Add("Checked", m_TP, "GroupChecked");
this.numericUpDown1.DataBindings.Add("Value", m_TP, "SomeNumber");
this.textBox1.DataBindings.Add("Text", m_TP, "SomeText");
this.checkBox1.DataBindings.Add("Checked", m_TP, "BoxChecked");
// Bind the values of the properties to the lables
this.label4.DataBindings.Add("Text", m_TP, "GroupChecked");
this.label5.DataBindings.Add("Text", m_TP, "SomeNumber");
this.label6.DataBindings.Add("Text", m_TP, "SomeText");
this.label8.DataBindings.Add("Text", m_TP, "BoxChecked");
}
}
一个属性存储类:
class TestProperties
{
public bool GroupChecked { get; set; }
public decimal SomeNumber { get; set; }
public string SomeText { get; set; }
public bool BoxChecked { get; set; }
public TestProperties()
{
GroupChecked = false;
SomeNumber = 0;
SomeText = string.Empty;
BoxChecked = true;
}
}
编辑: 这是我的自定义控件的来源:
/// <summary>
/// Custom control to create a checked group box.
/// Enables / disables all controls within the group depending upon the state of the check box
/// </summary>
public class CheckedGroupBox : System.Windows.Forms.GroupBox
{
#region Private Member Variables
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Checkbox to enable / disable the controls within the group
/// </summary>
private CheckBox chkBox;
/// <summary>
/// Label for the group box which is set to autosize
/// </summary>
private Label lblDisplay;
#endregion
/// <summary>
/// Default constructor for the control
/// </summary>
public CheckedGroupBox()
{
// This call is required by the Windows Form Designer.
InitializeComponent();
// The text of these controls should always be empty.
this.Text = "";
this.chkBox.Text = "";
}
#region Events & Delegates
/// <summary>
/// Event to forward the change in checked flag
/// </summary>
public event EventHandler CheckedChanged;
/// <summary>
/// Event to forward the change in checked state of the checkbox
/// </summary>
public event EventHandler CheckStateChanged;
private void chkBox_CheckedChanged(object sender, EventArgs e)
{
// Disable the controls within the group
foreach (Control ctrl in this.Controls)
{
if (ctrl.Name != "chkBox" && ctrl.Name != "lblDisplay")
{
ctrl.Enabled = this.chkBox.Checked;
}
}
// Now forward the Event from the checkbox
if (this.CheckedChanged != null)
{
this.CheckedChanged(sender, e);
}
}
private void chkBox_CheckStateChanged(object sender, EventArgs e)
{
// Forward the Event from the checkbox
if (this.CheckStateChanged != null)
{
this.CheckStateChanged(sender, e);
}
}
#endregion
#region 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.chkBox = new System.Windows.Forms.CheckBox();
this.lblDisplay = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// chkBox
//
this.chkBox.Location = new System.Drawing.Point(8, 0);
this.chkBox.Name = "chkBox";
this.chkBox.Size = new System.Drawing.Size(16, 16);
this.chkBox.TabIndex = 0;
this.chkBox.CheckStateChanged += new System.EventHandler(this.chkBox_CheckStateChanged);
this.chkBox.CheckedChanged += new System.EventHandler(this.chkBox_CheckedChanged);
//
// lblDisplay
//
this.lblDisplay.AutoSize = true;
this.lblDisplay.Location = new System.Drawing.Point(24, 0);
this.lblDisplay.Name = "lblDisplay";
this.lblDisplay.Size = new System.Drawing.Size(97, 13);
this.lblDisplay.TabIndex = 1;
this.lblDisplay.Text = "CheckedGroupBox";
//
// CheckedGroupBox
//
this.BackColor = System.Drawing.Color.AliceBlue;
this.Controls.Add(this.chkBox);
this.Controls.Add(this.lblDisplay);
this.Size = new System.Drawing.Size(100, 100);
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
#region Public properties
[Bindable(true), Category("Appearance"), DefaultValue("Check Group Text")]
public override string Text
{
get{ return this.lblDisplay.Text; }
set{ this.lblDisplay.Text = value; }
}
[Bindable(true), Category("Appearance"), DefaultValue("Checked")]
public System.Windows.Forms.CheckState CheckState
{
get{ return this.chkBox.CheckState; }
set
{
this.chkBox.CheckState = value;
foreach( Control ctrl in this.Controls )
{
if( ctrl.Name != "chkBox" && ctrl.Name != "lblDisplay" )
{
ctrl.Enabled = this.chkBox.Checked;
}
}
}
}
[Bindable(true), Category("Appearance"), DefaultValue("True")]
public bool Checked
{
get{ return this.chkBox.Checked; }
set
{
this.chkBox.Checked = value;
foreach( Control ctrl in this.Controls )
{
if( ctrl.Name != "chkBox" && ctrl.Name != "lblDisplay" )
{
ctrl.Enabled = this.chkBox.Checked;
}
}
}
}
[Bindable(true), Category("Behavior"), DefaultValue("False")]
public bool ThreeState
{
get{ return this.chkBox.ThreeState; }
set{ this.chkBox.ThreeState = value; }
}
#endregion
}