请遍历页面上所有的TextBox控件并给它赋值为string.Empty
网上能查到的一些解法的问题
第一种,遍历this.Controls
代码如下:
<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->
foreach
(Control ctl
in
this
.Controls)
{
if
(
typeof
(ctl)
==
typeof
(TextBox))
.
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这样并不能遍历整个页面中的TextBox
- this.Controls只是包含了Page根一级的control,这样次级的control就都没有遍历
- TextBox一般会放在form里面,遍历this.Controls只会访问form control,而不会访问form的子contorl,其中的TextBox
第二种,遍历Controls[1]
代码如下:
<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->
for
(
int
i
=
0
;i
<
inPage.Controls[
1
].Controls.Count;i
++
)
{
if
(inPage.Controls[
1
].Controls[i].GetType().ToString()
==
"
System.Web.UI.WebControls.TextBox
"
)
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同样的情况:
- 这种代码没有通用性,你怎么就知道Control[1]正是你要遍历的collection
- 次级的control都没有遍历
我认为正确的做法:使用递归对页面control树进行完全遍历,并对每一个control进行处理。递归算法如下:
- 传入page的this.Colletions
- 对每一个contorl,如果contorl没有包含子control,进行处理。
- 如果包含,递归调用这个函数处理子control
代码:
<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->
private
void
InitialControl(ControlCollection objControlCollection)
{
foreach
(System.Web.UI.Control objControl
in
objControlCollection)
{
if
(objControl.HasControls())
{
InitialControl(objControl.Controls);
}
else
{
if
(objControl
is
System.Web.UI.WebControls.TextBox)
{
((TextBox)objControl).Text
=
String.Empty;
}
}
}
}
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