Asp.Net中清空所有textbox的几种方法

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 = "";   
}   
}  

 

 

//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="";   
}   
}   
}   
}  

  

 

  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
        }

 

//最后一种用Jquery   
function ClearText() {   
    $("input").each(function() {   
        $(this).val('');   
    });   
}  

 

  //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;
                }
            }