Restrict Special Characters in TextBox using JavaScript in asp.net

Hi friends, today i am going show you how to Restrict Special Characters in TextBox or in Textarea  using JavaScript in asp.net.

Screen 1

I have two method to do it in javascript.

First Method:

In this method you only want to add "RestrictHtmlCharacter-Tags.js" file in order to restrict special character in textbox.

Using this method you don't need to add anything to textbox. Only you have to do one thing only call that "RestrictHtmlCharacter-Tags.js" js file in your page and it will restrict all the textbox entering special character. For this you have to add jquery 1.7.2.min.js

Click here to download RestrictHtmlCharacter-Tags.js

If you have update panel on your page please add following initializing code to initialize the  "RestrictHtmlCharacter-Tags.js".

        //Restrict HTML Character
        $(document).ready(function() {
            try {
                RestrictHtmlCharacter();                Sys.WebForms.PageRequestManager.getInstance().add_endRequest(RestrictHtmlCharacter);
            }
            catch (err) {
            }
        }); 

 Add this following file in head tag:

<script src="Script/jquery-1.7.2.min.js" type="text/javascript"></script>

<script src="Script/RestrictHtmlCharacter-Tags.js" type="text/javascript"></script>

 Using this way you don't need too add anything in textbox only add this javascript file.

Second Method:

The second method to do the same is following:

The script works in such a way that the TextBox will accept only alphabets, numbers i.e. alphanumeric values with some allowed special keys, thus unless a special character key has been specified to be excluded it won’t be accepted.

HTML:

<div align="center" style="width: 100%;">
        <div style="width: 300px;">
            <fieldset>
                <legend>Restrict Special Character</legend>
                <br />
                Note: Special character <b>not</b> allowed.
                <br />
                <br />
                <asp:TextBox ID="txtSearch" runat="server" onkeypress="return IsCharacterRestrict(event);"
                    ondrop="return false;" onpaste="return false;" Style="font-size: 14px;
                    margin-top: 10px; height: 30px; width: 250px; color: #353535;" MaxLength="100"></asp:TextBox>
                <br />
                <br />
                <br />
            </fieldset>
        </div>
    </div>

Script:

<script type="text/javascript">
        var specialKeys = new Array();
        specialKeys.push(8);  //Backspace
        specialKeys.push(9);  //Tab
        specialKeys.push(46); //Delete
        specialKeys.push(36); //Home
        specialKeys.push(35); //End
        specialKeys.push(37); //Left
        specialKeys.push(39); //Right
        function IsCharacterRestrict(e) {
            var keyCode = e.keyCode == 0 ? e.charCode : e.keyCode;
            var ret = ((keyCode >= 48 && keyCode <= 57) || (keyCode >= 65 && keyCode <= 90) || (keyCode >= 97 && keyCode <= 122) || (specialKeys.indexOf(e.keyCode) != -1 && e.charCode != e.keyCode));
            return ret;
        }
    </script>
 

Download Link :

Download Complete Project

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AJAX Image Upload in Asp.net C#

We've got a sweet solution that uploads an image with AJAX and then immediately displays.

Ajax ,an acronym for Asynchronous Javascript and Xml is a group of interrelated web development techniques used on the client side to create asynchronous web applications.With Ajax, web applications can send data to, and retrieve data from, a server asynchronously (in the background) without interfering with the display and behavior of the existing page.

Here we are using ajaxupload.js to upload an image and show upload button on mouse hover and mouse out same like facebook.

Screen 1

On Mouse hover show upload button

Screen 2

Choose image file

Screen 3

Finally Preview of image without postback (without refreshing page)

Screen 4

JS :

You need this following javascript file to perform AJAX Image Upload they are following:

• jquery-1.7.2.min.js

• ajaxupload.js

HTML:

<div align="center" style="width: 100%; height: auto;">
        <div style="width: 960px; height: auto;">
            <div style="background-color: #eee; border: 1px solid #CCC;">
                <h1>
                    AJAX Image Upload in Asp.net C#</h1>
                <h4>
                    Contains front-end (jQuery) and back-end code (c#) to upload an image and display
                    the same image on screen.</h4>
                <div align="left">
                    <h4 style="margin-left: 60px;">
                        > On Mouse hover show upload button</h4>
                    <h4 style="margin-left: 60px;">
                        > On Mouse out hide upload button</h4>
                </div>
                <div style="width: auto; height: auto; margin-top: 45px; margin-bottom: 50px; margin-left: 420px;
                    overflow: hidden;">
                    <div class="pic" style="float: left; height: 160px; width: 150px; border: 1px solid #CCC;">
                        <img id="imgUser" height="160" width="150" src="Images/NoPhotoAvailable.jpg" runat="server" />
                        <div align="center" style="height: 23px; z-index: 5; width: auto; position: absolute;
                            bottom: 0px; right: 0px;">
                            <asp:Button ID="btnUpload" ValidationGroup="vgUploadImage" runat="server" Text="Upload"
                                class="btn-update" Style="border: 0px; width: 69px; height: 23px; margin: 0px;
                                background-color: #93bbe1;" />
                        </div>
                    </div>
                </div>
                <div style="width: auto; height: 80px; margin-left: 35px;">
                    <div style="height: 25px; width: auto;">
                        <asp:Label runat="server" ID="lblImageMsg"></asp:Label>
                        <asp:TextBox ID="txtImage" placeholder="Image name come here" runat="server" Style="height: 30px;
                            font-size: 16px; width: 250px;"></asp:TextBox>
                    </div>
                </div>
            </div>
        </div>
    </div>

Script :

//Ajax Upload Script
        $(function() {
            new AjaxUpload('#<%=btnUpload.ClientID %>', {
                action: 'UploadHandler.ashx?Image=True',
                onComplete: function(file, response) {
                    debugger;
                    if (response != null) {
                        $('#<%=imgUser.ClientID %>').attr('src', response.toString());
                        document.getElementById("<%=txtImage.ClientID %>").value = file.toString();
                    }
                    else {
                        alert('Response is null!!!');
                    }
                },
                onSubmit: function(file, ext) {
                    if (!(ext && /^(jpeg|png|gif|bmp|jpg)$/i.test(ext))) {
                        alert('Invalid Image Format.');
                        return false;
                    }
                }
            });
        });

// If you don't want to show upload button on mouse hover and out just remove this code.

//On mouse hover and mouse out show/hide button code
        $(document).mousemove(function(e) {
            var $targ = $(e.target);
            if ($targ != "") {
                if ($targ.closest('.pic').length || $targ.is('.pic').length || $targ.closest('input[type=file]').length || $targ.is('input[type=file]').length) {
                    $('#<%=btnUpload.ClientID %>').show();
                }
                else {
                    $('#<%=btnUpload.ClientID %>').hide();
                }
            }
        });

Handler Code :

if (context.Request.QueryString["Image"] != null && context.Request.QueryString["Image"].ToString() != "")
        {
            if (context.Request.Files[0] != null && context.Request.Files[0].ToString() != "")
            {
                HttpPostedFile postedFile = context.Request.Files[0];

                string ImagePath = "UploadedImage/";
                postedFile.SaveAs(System.Web.HttpContext.Current.Server.MapPath(ImagePath) + postedFile.FileName.ToString());

                context.Response.Write(ImagePath + postedFile.FileName.ToString());
                context.Response.End();
            }
        }

Download Link :

Download Complete Project

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Styled Checkboxes with pure CSS that work upto IE5 and cross browser

 

Styled Checkboxes with pure CSS that work upto IE5 and cross browser

Styled checkboxes with pure CSS

The idea is that using the ':before' pseudo-class allows us to define the checkbox style in pure CSS, using the 'content' attribute to define the check symbol used and the ':checked' pseudo-selector to switch it. ':before' has to be on the subsequent element so that we can select it properly (you can't define ':before' for <input> elements).

IE 8 doesn't support ':checked' so we switch a class on it using jQuery and IE 6 & 7 don't support ':before' so we add a <span> to do its job.

IE fallbacks currently don't work! Feel free to suggest fixes :-) 

Demo

 

 

CSS

<style type="text/css">
.ckbox
{
width: 25px;
height: 25px;
}
.custom-checkbox
{
position: relative;
display: inline-block;
}

.custom-checkbox > .box
{
position: relative;
display: block;
width: 25px;
height: 25px;
background-color: #E5E5E5;
padding: 0px;
margin: 0px;
}

.custom-checkbox > .box > .tick
{
position: absolute;
left: 4px;
top: 7px;
width: 14px;
height: 6px;
border-bottom: 4px solid #000;
border-left: 4px solid #000;
-webkit-transform: rotate(-45deg);
-moz-transform: rotate(-45deg);
-o-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
transform: rotate(-45deg);
display: none;
}

.custom-checkbox > input:checked + .box > .tick
{
display: block;
}

.custom-checkbox > input
{
position: absolute;
outline: none;
left: 0;
top: 0;
padding: 0;
width: 25px;
height: 25px;
border: none;
margin: 0;
opacity: 0;
z-index: 1;
}

</style> 

Script

//Add jquery file

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>

//Checkbox Check click call the function

<script type="text/javascript">
  GetSelectedValue();
    function GetSelectedValue() {
    var final = '';

    $('.ckbox:checked').each(function() {

                var values = $(this).val();
                final += values + ",";       
     });
     alert(final);
}
</script>

HTML

 
<body>
 <form action="" method="GET">
  <table style="background-color: #E5E5E5;">
   <tr>
    <td>
      <span class="custom-checkbox">
      <input onclick="GetSelectedValue();" id="fileItem" name="fileItem"   type="checkbox" class="ckbox" value="1" checked="checked" />
      <span class="box" ><span class="tick"></span></span>
      </span>
      <input id="fileId" name="fileId" type="hidden" value="" />
    </td>
    <td>
      <label for="fileItem" title="">Check</label>

       <div class="custom-checkbox">
          chkChecked
       </div>
   </td>
  </tr>
  <tr>
   <td>
     <span class="custom-checkbox">
     <input onclick="GetSelectedValue();" id="fileItem1" name="fileItem1" type="checkbox" class="ckbox" value="2" />
     <span class="box" ><span class="tick"></span></span>
     </span>
     <input id="fileId" name="fileId" type="hidden" value="" />
  </td>
  <td>
    <label for="fileItem1" title="">Check</label>

   <div class="custom-checkbox">
     chkChecked
    </div>
   </td>
  </tr>
 </table>
</body> 

Download Link

https://drive.google.com/file/d/0B7XVDU9gdC-lQnlUV2Fqc3BSYUU/edit?usp=sharing