上一篇介绍了通过委托事件的方式,实现了子窗体调用父窗体的控件。本文将用参数传递的方式,实现共用一个实体对象。
本文所用的代码,也是在上一篇基础上做修改。
1.父窗体
将共用实体对象innoBERT作为子窗体构造函数的参数。代码如下“修改此行”部分。
if (subFormPPGTx[i] == null || subFormPPGTx[i].IsDisposed)
{
subFormPPGTx[i] = new SubFormPPG(innoBERT, i);//修改此行
subFormPPGTx[i].Text = formTitle;
subFormPPGTx[i].Name = formName;
//subFormPPGTx[i].Tag = i;
subFormPPGTx[i].SendToParent += new SubFormPPG.SendFun(RecvInfo);
subFormPPGTx[i].Show(this);
}
else
{
subFormPPGTx[i].WindowState = FormWindowState.Normal;
subFormPPGTx[i].Activate();
}
2.子窗体
首先定义一个类字段,然后修改子窗体的构造函数,添加参数,用于接收父窗体传递的实体对象。这样就可以在子窗体里,调用实体对象innoBERT。
InnolightBERT innolightBERT;
bool formStatus = false;
private int ID;
public delegate void SendFun(int number);
public event SendFun SendToParent;
public SubFormPPG(InnolightBERT innoBERT, int ID)
{
InitializeComponent();
this.innolightBERT = innoBERT;//接收对象
this.ID = ID;
}
3.应用
子窗体调用共用实体对象的属性。
private void SubFormPPG_Load(object sender, EventArgs e)
{
this.GetPPGSetting(this.ID);
}
private void GetPPGSetting(int channel)
{
try
{
switch (channel)
{
case 0:
this.comboBoxSwing.SelectedIndex = (int)innolightBERT.Tx1_Swing;
break;
case 1:
this.comboBoxSwing.SelectedIndex = (int)innolightBERT.Tx2_Swing;
break;
case 2:
this.comboBoxSwing.SelectedIndex = (int)innolightBERT.Tx3_Swing;
break;
case 3:
this.comboBoxSwing.SelectedIndex = (int)innolightBERT.Tx4_Swing;
break;
default:
return;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}