Asp.Net中清空所有textbox的几种方法

http://jhxk.iteye.com/blog/442739

C#代码


用反射:

FieldInfo[] infos = GetType().GetFields( BindingFlags.Public | BindingFlags.NonPublic|BindingFlags.GetField |BindingFlags.Instance);

for(int i=0;i<infos.Length;i++)

{

if(infos[i].FieldType == typeof(TextBox))

{

((TextBox)infos[i].GetValue(this)).Text = "";

}

}

Js代码


//使用js,好处是不用刷新页面：

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="";

}

}

}

}

Js代码


function clearInfo(){//和上面这种类似只是将不清空的文本框ID放入allowtedExtension数组里

var flag;

var obj=window.document.forms[0];

var allowtedExtension=["txtPictureName","txtUpLoadBeginDate","txtUpLoadEndDate"];

for(var i=0;i<obj.length;i++){

var elem=obj.elements[i];

if(elem){//判断是否存在

if(elem.type=="text"){

for(var j=0;j<allowtedExtension.length;j++){

var flag=true;

if(allowtedExtension[j]==elem.id){//判断ID数否是与数组中某个ID相等

flag=false;

break;

}

}

if(flag){

elem.value="";

}

}

}

}

document.getElementById("ddlPicType").selectedIndex=0;//清空下拉框

document.getElementById("lblPicUpName").innerHTML="";//清空label

}

Js代码


//最后一种用Jquery

function ClearText() {

$("input").each(function() {

$(this).val('');

});

}

C#代码


//从this.Controls中清空只能是通过在后置代码中new 的TextBox控件

foreach( Control childControl in this.Controls )

{

if( childControl is TextBox )

((TextBox)childControl).Text = "";

}

//以下两种都是页面上已经定义好的清空方式

foreach (Control childControl in this.Controls)

{

if (childControl is TextBox)

{

(childControl as TextBox).Text = string.Empty;

}

}

foreach (Control c in this.form1)

{

if (c.GetType().ToString().Contains("TextBox"))

{

((TextBox)c).Text = "";

}

if (c.GetType().ToString().Contains("ComboBox"))

{

((ComboBox)c).Text = "";

}

if (c.GetType().ToString().Contains("CheckBox"))

{

((CheckBox)c).Checked = false;

}

}