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我有一些自定义控件。我的控件继承自CompositControl。在我的页面中,我在On_Init()中创建它们。我将这些控件插入占位符。当我单击复选框本身时,它会发送正确的回发,但是当我单击复选框旁边的文本时,我有2个回发:一个事件目标等于null,另一个具有正确的ID。当它发送正确的回传ID时,Page.IsPostBack为false,这完全不正确。我希望点击文本的行为就像点击复选框。我怎么做?点击自定义控件checkboxlist的文本发送null事件目标
在此先感谢。
这是我创造的CheckBoxList的:
protected override void CreateChildControls()
{
Controls.Clear();
_lQuestion = new Label();
_lQuestion.ID = "quest"+QuestionID;
_lQuestion.Text = Question
+ QuestionID //for debugging
;
_lQuestion.CssClass = EddQuestionareStyle.EddQuestionStyle.ToString();
_cbl = new CheckBoxList();
_cbl.ID = "ans"+QuestionID;
for(int i=0; i<_PossibleAnswers.Count();i++)
{
AnswerOption a = _PossibleAnswers[i];
_cbl.Items.Add(a.Value.ToString());
}
_cbl.CssClass = EddQuestionareStyle.EddAnswerStyle.ToString();
_cbl.SelectedIndexChanged += new EventHandler(cbl_SelectedIndexChanged);
Page.RegisterRequiresPostBack(_cbl);//will call LoadPostData
Controls.Add(new LiteralControl("<br>"));
Controls.Add(_lQuestion);
Controls.Add(new LiteralControl("<br>"));
Controls.Add(_cbl);
ChildControlsCreated = true;
}
这是我的AddAttributesToRender:
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID);
writer.AddAttribute(HtmlTextWriterAttribute.Type, this.GetType().Name);
writer.AddAttribute(HtmlTextWriterAttribute.Onclick,
Page.ClientScript.GetPostBackEventReference(this, this.UniqueID));
base.AddAttributesToRender(writer);
}
,它将使HTML这样的:
<br />
<span id="214" onclick="__doPostBack('214','214')" type="MyCheckBoxList" name="214">
<br />
<span class="EddQuestionStyle" id="214_quest21">Where will the money deposited in your
account(s) come from? Select all that apply.21</span><br />
<table class="EddAnswerStyle" id="214_ans21" border="0">
<tbody>
<tr>
<td>
<input id="214_ans21_0" type="checkbox" checked name="214$ans21$0" value="on" /><label
for="214_ans21_0">Payroll</label>
</td>
<td>
<input id="214_ans21_4" type="checkbox" checked name="214$ans21$4" value="on" /><label
for="214_ans21_4">Cash</label>
</td>
<td>
<input id="214_ans21_7" type="checkbox" name="214$ans21$7" value="on" /><label for="214_ans21_7">Gifts</label>
</td>
</tr>
<tr>
<td>
<input id="214_ans21_1" type="checkbox" checked name="214$ans21$1" value="on" /><label
for="214_ans21_1">Payments other than Payroll</label>
</td>
<td>
<input id="214_ans21_5" type="checkbox" name="214$ans21$5" value="on" /><label for="214_ans21_5">Account
Transfers</label>
</td>
<td>
<input id="214_ans21_8" type="checkbox" name="214$ans21$8" value="on" /><label for="214_ans21_8">Loans</label>
</td>
</tr>
</tbody>
</table>
当我点击复选框Payroll,例如,我有一个ID为214的回传,它是范围ID。当我点击文本“工资单”时,我有2个回复,事件目标为null,214。我做错了什么? 感谢