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我創建了一個繼承asp.net gridview的自定義gridview控件。我需要在此GridView中使用項目模板。我在自定義gridview中創建了一個生成項目模板的方法。動態Gridview - 項目模板控制事件處理
public void addTemplateField(Control headerTemplateControl, Control itemTemplateControl, EventHandler bindHandler, EventHandler initHandler, string headerText, string sortExpression, bool isVisible, int? heightPx, int? widthPercent)
{
TemplateField tField = new TemplateField();
if (headerTemplateControl != null)
tField.HeaderTemplate = new GridViewTemplate(ListItemType.Header, headerTemplateControl);
if (bindHandler != null && initHandler != null)
tField.ItemTemplate = new GridViewTemplate(ListItemType.Item, itemTemplateControl, bindHandler, initHandler);
else if (bindHandler != null)
tField.ItemTemplate = new GridViewTemplate(ListItemType.Item, itemTemplateControl, bindHandler, false);
else if (initHandler != null)
tField.ItemTemplate = new GridViewTemplate(ListItemType.Item, itemTemplateControl, initHandler, true);
else
tField.ItemTemplate = new GridViewTemplate(ListItemType.Item, itemTemplateControl);
if (sortExpression != null)
tField.SortExpression = sortExpression;
tField.Visible = isVisible;
if (headerText != null)
tField.HeaderText = headerText;
if (heightPx.HasValue)
tField.HeaderStyle.Height = new Unit(heightPx.Value, UnitType.Pixel);
if (widthPercent.HasValue)
tField.HeaderStyle.Height = new Unit(widthPercent.Value, UnitType.Percentage);
addColumnField(tField);
}
這該是多麼我已經實現了Itemplate
public class GridViewTemplate : ITemplate
{
int _controlCount = 0;
ListItemType _templateType;
EventHandler _bindHandler;
EventHandler _initHandler;
Control _control;
public GridViewTemplate(ListItemType type, Control control)
{
this._templateType = type;
this._control = control;
}
public GridViewTemplate(ListItemType type, Control control, EventHandler Handler, bool isInitHandler)
{
this._templateType = type;
this._control = control;
if (isInitHandler)
this._initHandler = Handler;
else
this._bindHandler = Handler;
}
public GridViewTemplate(ListItemType type, Control control, EventHandler bindHandler, EventHandler initHandler)
{
this._templateType = type;
this._control = control;
this._bindHandler = bindHandler;
this._initHandler = initHandler;
}
public Control Copy(Control ctrlSource)
{
Type _type = ctrlSource.GetType();
Control ctrlDest = (Control)Activator.CreateInstance(_type);
foreach (PropertyInfo prop in _type.GetProperties())
{
if (prop.CanWrite)
{
if (prop.Name == "ID")
{
ctrlDest.ID = ctrlSource.ID + "_copy_" + _controlCount;
}
else
{
prop.SetValue(ctrlDest, prop.GetValue(ctrlSource, null), null);
}
}
}
_controlCount++;
return ctrlDest;
}
public void InstantiateIn(Control container)
{
switch (_templateType)
{
case ListItemType.Header:
container.Controls.Add(_control);
break;
case ListItemType.Item:
Control temp = Copy(_control);
if(_bindHandler != null)
temp.DataBinding += _bindHandler;
if (_initHandler != null)
temp.Init += _initHandler;
container.Controls.Add(temp);
break;
}
}
}
在需要說Default.aspx.cs，我創建這個gridview的onPreInit和其附加的事件處理程序的OnInit的頁面。
我通過調用addTemplateField（）將複選框添加到網格。
cbl = new CheckBox();
cbl.AutoPostBack = true;
init = new EventHandler(cbl_Init);
grd.addTemplateField(null, cbl, null, init, "SERVER", null, true, 20, 20);
void cbl_Init(object sender, EventArgs e)
{
CheckBox c = (CheckBox)sender;
c.CheckedChanged +=new EventHandler(cbl_CheckedChanged);
}
void cbl_CheckedChanged(object sender, EventArgs e)
{
// Modify datasource
// databind();
//如果我刪除此數據綁定，每次都會處理checkchanged。如果我保留數據綁定，事件只能處理其他時間。 }
問題是複選框checkchanged事件被觸發的替代時間。每隔一段時間，頁面發回，但checkchanged事件不處理。我迷失於尋找原因，更不用說解決方案了。！？！？！