如何快速清除页面上所有TextBox和HtmlInput的值
我的做法行不通--------------------编程问答-------------------- 用js清除。
protected void ClearAllTextBox()
{
foreach (Control con in this.Controls)
{
try
{
TextBox edt = (TextBox)con;
edt.Text = string.Empty;
}
catch
{
}
try
{
HtmlInputText edt = (HtmlInputText)con;
edt.Value = string.Empty;
}
catch
{
}
}
}
因为textbox和HtmlInputText在客户端生成出来就是textarea和input[type=text]，只要用js清除这两种标签的值就可以了。可以使用jQuery来做。 --------------------编程问答-------------------- 必须用递归的
--------------------编程问答--------------------
public static void SetControlReadOnly(Control ctr)
{
if (ctr is TextBox)
{
TextBox txtControl = (TextBox)ctr;
txtControl.ReadOnly = true;
txtControl.Enabled = false;
}
else if (ctr is RadioButton)
{
RadioButton btn = (RadioButton)ctr;
btn.Enabled = false;
}
else if (ctr is Button)
{
Button btn = (Button)ctr;
btn.Enabled = false;
}
else if (ctr is FileUpload)
{
FileUpload btn = (FileUpload)ctr;
btn.Enabled = false;
}
else if (ctr is RadioButtonList)
{
RadioButtonList btn = (RadioButtonList)ctr;
btn.Enabled = false;
}
else if (ctr is CheckBox)
{
CheckBox cb = (CheckBox)ctr;
cb.Enabled = false;
}
else if (ctr is CheckBoxList)
{
CheckBoxList cb = (CheckBoxList)ctr;
cb.Enabled = false;
}
else if (ctr is DropDownList)
{
DropDownList list = (DropDownList)ctr;
list.Enabled = false;
}
else if (ctr is HtmlTextArea)
{
HtmlTextArea cb = (HtmlTextArea)ctr;
cb.Attributes.Add("readonly", "");
cb.Disabled = true;
}
else if (ctr is HtmlSelect)
{
HtmlSelect rb = (HtmlSelect)ctr;
rb.Disabled = true;
}
else if (ctr is HtmlInputCheckBox)
{
HtmlInputCheckBox rb = (HtmlInputCheckBox)ctr;
rb.Disabled = true;
}
else if (ctr is HtmlInputRadioButton)
{
HtmlInputRadioButton rb = (HtmlInputRadioButton)ctr;
rb.Disabled = true;
}
else if (ctr is HtmlInputText)
{
HtmlInputControl input = (HtmlInputControl)ctr;
input.Attributes.Add("readonly", "");
input.Disabled = true;
}
else if (ctr is HtmlInputFile)
{
HtmlInputFile input = (HtmlInputFile)ctr;
input.Attributes.Add("readonly", "");
input.Disabled = true;
}
else
foreach (Control ctr1 in ctr.Controls)
{
SetControlReadOnly(ctr1);
}
}
document.getElementsByName('text') --------------------编程问答--------------------
但是在服务端无法调用 jquery --------------------编程问答-------------------- 前台用js巨简单，为什么要在后台用那么复杂的方法呢？必须的吗？ --------------------编程问答--------------------
private void ClearTextBox()
{
foreach (System.Web.UI.Control control in this.Controls)
{
for (int i = 0; i < control.Controls.Count; i++)
{
if (control.Controls[i] is System.Web.UI.WebControls.TextBox)
{
System.Web.UI.WebControls.TextBox tbx = (System.Web.UI.WebControls.TextBox)control.Controls[i];
tbx.Text = "";
}
}
}
}
或者JavaScript
<script type="text/javascript" language="javascript">
function ClearAllTextBox() {
var obj = window.document.forms[0];
for (i = 0; i < obj.elements.length; i++) {
var elem = obj.elements[i];
if (elem) {
if (elem.type == "text") {
elem.value = "";
}
}
}
}
</script>
补充：.NET技术 , ASP.NET
