Watermark for Textbox in MVC3

问题:

How do I set watermark for a texbox in MVC3 .Also if there are multiple textboxes in a web page, how do you write different watermark text for each textbox?

       <%:Html.TextBoxFor(mdl => mdl.inputTextSearch, Model.inputTextSearch )%>

Appreciate your response

回答1:

If I understand your question, you can just pass in:

new { placeholder = "my watermark" }

as the htmlAttributes parameter in Html.TextBoxFor.

Edit:

You can also add support for older browsers by using Javascript as outlined here:

http://www.standardista.com/html5-placeholder-attribute-script

回答2:

I usually just use the following jquery,for MVC project on fields which need a watermark: (the code compatible with IE 6 - 9, Firefox 2 - 4, safari 4.

 $('#UserSearch').Watermark("Search term", "#fff");

/// JQuery Plugin code.

(function($) {
var map=new Array();
$.Watermark = {
    ShowAll:function(){
        for (var i=0;i<map.length;i++){
            if(map[i].obj.val()==""){
                map[i].obj.val(map[i].text);                    
                map[i].obj.css("color",map[i].WatermarkColor);
            }else{
                map[i].obj.css("color",map[i].DefaultColor);
            }
        }
    },
    HideAll:function(){
        for (var i=0;i<map.length;i++){
            if(map[i].obj.val()==map[i].text)
                map[i].obj.val("");                 
        }
    }
}

$.fn.Watermark = function(text,color) {
    if(!color)
        color="#aaa";
    return this.each(
        function(){     
            var input=$(this);
            var defaultColor=input.css("color");
            map[map.length]={text:text,obj:input,DefaultColor:defaultColor,WatermarkColor:color};
            function clearMessage(){
                if(input.val()==text)
                    input.val("");
                input.css("color",defaultColor);
            }

            function insertMessage(){
                if(input.val().length==0 || input.val()==text){
                    input.val(text);
                    input.css("color",color);   
                }else
                    input.css("color",defaultColor);                
            }

            input.focus(clearMessage);
            input.blur(insertMessage);                              
            input.change(insertMessage);

            insertMessage();
        }
    );
};
})(jQuery);

回答3:

Using the MVC 3 standard, and an HTML5 compliant browser you can do:

@Html.TextBoxFor(mdl => mdl.inputTextSearch, new { placeholder = "my watermark" })

回答4:

Try this Jquery .You need to create an image with the watermark text.

$(document).ready(function () {

            /*Watermark for date fields*/

             if ($("#dob").val() == "") {
                $("#dob").css("background", "#ebebeb url('/Content/images/DateWaterMark.png') no-repeat 1px 0px");
            }

            $("#dob").focus(function () {
                if (watermark == 'MM/DD/YYYY') {
                    $("#dob").css("background-image", "none");
                    $("#dob").css("background-color", "#fff");
                }
            }).blur(function () {
                if (this.value == "") {
                    $("#dob").css("background", "#ebebeb url('/Content/images/DateWaterMark.png') no-repeat 1px 0px");
                }
            });

            $("#dob").change(function () {
                if (this.value.length > 0) {
                    $("#dob").css("background", "#fff");
                }
            });
}