C#Winform事件处理程序
我班上有两个构造器:C#Winform事件处理程序,c#,winforms,event-handling,C#,Winforms,Event Handling,我班上有两个构造器: public partial class Fiche_Ordre : Le_MainForm { public Fiche_Ordre() { InitializeComponent(); Constuct_Page(); } public Fic
public partial class Fiche_Ordre : Le_MainForm
{
public Fiche_Ordre()
{
InitializeComponent();
Constuct_Page();
}
public Fiche_Ordre(string OrderID): this()
{
Pers_Ordre oPersOrdr = oOrder_BL.Get_OrdreOne_BL(ClientID, Convert.ToInt32(OrderID), false);
textEdit_RefExpred.Text = oPersOrdr.RefExpd;
lookUpEdit_Agence.EditValue = oPersOrdr.Agence;
lookUpEdit_Transport.EditValue = oPersOrdr.Transporteur;
lookUpEdit_Dest.EditValue = oPersOrdr.DestId;
..................
}
public void Constuct_Page()
{
try
{
ClientID = Program.Le_ClientID;
....
#region LookUpEdidt Destinataire
lookUpEdit_Dest.Properties.DataSource = Auxiliaire_BL.FillCombo_BL(false, ClientID).Tables["ComboFill"];
lookUpEdit_Dest.Properties.ValueMember = "CODE_DEST";
lookUpEdit_Dest.Properties.DisplayMember = "CODE_DEST";
LookUpColumnInfoCollection coll_Dest = lookUpEdit_Dest.Properties.Columns;
// A column to display the ProductID field's values.
coll_Dest.Add(new LookUpColumnInfo("CODE_DEST", 0, "Code Destinataire"));
// A column to display the ProductName field's values.
coll_Dest.Add(new LookUpColumnInfo("RS_NOM", 0, "Raison Social"));
// Set column widths according to their contents and resize the popup, if required.
lookUpEdit_Dest.Properties.BestFitMode = BestFitMode.BestFitResizePopup;
// Enable auto completion search mode.
lookUpEdit_Dest.Properties.SearchMode = SearchMode.AutoComplete;
// Specify the column against which to perform the search.
lookUpEdit_Dest.Properties.AutoSearchColumnIndex = 1;
lookUpEdit_Dest.EditValueChanged += new EventHandler(lookUpEdit_Dest_EditValueChanged);
#endregion
...
}
这很奇怪,因为当我使用public Fiche\u Ordre()
时,它不会触发neweventhandler(lookUpEdit\u Dest\u EditValueChanged)代码>;但是当我使用公共Fiche\u Ordre(string OrderID)
时,它确实会触发事件处理程序
这是否正常
它从主窗体调用的第一个构造函数
public partial class Le_MainForm : DevExpress.XtraEditors.XtraForm
{
public Le_MainForm()
{
InitializeComponent();
this.Name = "MainUSER";
if (Program.IsFA) barButtonItem_OrdList.Visibility = DevExpress.XtraBars.BarItemVisibility.Never;
}
private void barButtonItem_CreatOrdreAller_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
Close_AllForm();
Program.AllerRetour = "Ordre Aller";
Fiche_Ordre f_Fiche = new Fiche_Ordre();
f_Fiche.Show();
}
我从第二个构造函数调用它
public partial class Liste_Ordres : Le_MainForm
{
private void Liste_DobleClic(object sender, EventArgs e)
{
try
{
Program.OrderId = gridView_Liste_Ordres.GetFocusedRowCellValue("NO_ORDRE").ToString();
this.Hide();
Fiche_Ordre f_Fiche = new Fiche_Ordre(gridView_Liste_Ordres.GetFocusedRowCellValue("NO_ORDRE").ToString());
f_Fiche.Show();
}
catch (Exception excThrown)
{
MessageBox.Show(excThrown.Message);
}
}
先谢谢你
PS:第一个构造函数只是创建新的空白页,第二个构造函数是创建非新的(编辑页),所以我传递了id并填充了所有控件(文本框、备忘录等)编辑值更改的句柄连接在构造页的最后一行。因此,它仅在构造页面
之后的更改中激发。代码的部分是否更改了?这听起来像是一个过度简化的推测,但无论如何,值得仔细检查一下
此外,我可以向您建议另一项改进:
public Fiche_Ordre(string OrderID) : this.Fiche_Ordre()
{
// invokes the other constructor first, so they're guaranteed
// do be equivalent in the first part
Pers_Ordre oPersOrdr = oOrder_BL.Get_OrdreOne_BL(ClientID,
Convert.ToInt32(OrderID), false);
// ...
}
放置断点并查看lookUpEdit\u Dest当您想要绑定eventhandler时,我认为这个变量不会初始化,所以您需要将initialize从第二个构造函数添加到第一个构造函数。而是创建construct\u Page();只需输入Form_Load()您在第二个构造函数中使用OrderID做什么?@dbaseman这如何帮助您解决问题?@Likurg好吧,鉴于这是两个构造函数之间的唯一区别,我认为这可能是相关的,嗯?@dbaseman在第二个构造函数中有“…”,我认为使用OrderID有一些实现,但是(IMHO)这与当前问题无关。lookUpEdit\u Dest
的值是否因非默认构造函数中的额外代码而改变?如果未实现直接更改的控件(textEdit\u RefExpred、lookUpEdit\u代理、lookUpEdit\u传输),则无法确认或拒绝此操作。第二个构造函数中还有哪些代码?