Set Form Enctype (ASP.NET)

This UserControl sets the EncType of the server side form on an ASP.NET page. Useful if you have another UserControl that uploads a file, as it prevents the need to change the parent page EncType (to "multipart/form-data").

Code:

<%@ Control Language="C#" %>
<script runat="server">
public string EncType = "";

void Page_Load(object sender, EventArgs e)
{
	SetEncType(EncType);
}

protected void SetEncType(string EncType)
{
	// continue if enctype is valid
	if(EncType=="text/plain" || EncType=="multipart/form-data" || EncType=="application/x-www-form-urlencoded") {
		Control container = this.Parent;
		while( container.GetType() != typeof(UserControl) && container.GetType() != typeof(HtmlForm) && container.GetType() != typeof(Page) ) {
			container = container.Parent;
		}
		HtmlForm form = container as HtmlForm;
		if ( form != null) {
			form.Enctype = EncType;
		}
	}
}
</script>

Example use:

Register tag: <%@ Register TagPrefix="Form" TagName="EncType" Src="formenc.ascx" %>. Add at start of UserControl page: <Form:EncType EncType="multipart/form-data" runat="server" />

Comments

Post a Comment

Popular posts from this blog

Text Clips for Programmers Notepad 2 (XHTML)

Update (23 June, 2005) : Added DOCTYPEs. More Programmers Notepad 2 text clips. Some tags are not included (b, big, i, small, sub, sup) as these can be replaced with existing tags (em, strong), or styled using CSS. Create a file in the clips sub directory of the Programmers Notepad directory, with the extension .clips (i.e. xhtmltags.clips) and paste in the following code: <?xml version="1.0"?> <clips name="XHTML Tags"> <clip name="------ DOCTYPEs ------"></clip> <clip name="XHTML 1.0 transitional"><![CDATA[<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">|]]></clip> <clip name="XHTML 1.0 strict"><![CDATA[<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">|]]></clip> <clip name="XHTML 1.1...
Read more

Shrink Image (JavaScript)

This function shrinks an image, so its dimensions are no bigger than the maximum dimensions you define. // get new dimensions so it fits within the maximum // o = original dimensions / image, m = maximum dimensions function shrink(o, m) { // r = resized var r = {width: o.width, height: o.height}; // if an image, rather than an object, resize it if(o.nodeName && o.nodeName.toLowerCase() == "img") r = o; if(r.width > m.width) { r.height = r.height * (m.width / r.width); r.width = m.width; if(r.height > m.height) { r.width = r.width * (m.height / r.height); r.height = m.height; } } else if(r.height > m.height) { r.width = r.width * (m.height / r.height); r.height = m.height; } return r; } To use, simply supply the image and the dimensions to constrain it to: var image = document.getElementById("image"); var max = {width: 1024, ...
Read more

Select box manipulation with jQuery

If you read the jQuery mailing list , you may be aware that I have updated my plugins for working with select boxes . Summary of changes: addOption replaces any options with the same value (so think of it as an add/replace options plugin selectOptions selected options in addition to what was already selected, but there is now an option for it not to do this There are two new methods: copyOptions which is for copying options between select boxes ajaxAddOption allows you to add options via AJAX (i.e. could be used for create options dynamically from a server script)
Read more