How to add a picker to select a site or website and pass the selected site url in textbox

check this article from PlanetWilson SharePoint Blog its good

http://planetwilson.blogspot.com/2007/08/how-to-add-picker-to-send-to-other.html

SharePoint field objects – classname, name and types

While working on one of SharePoint project I searched for classnames and fieldtypes that I needed to identify all different field types.

Following table shows most important fields for list.

important fields.

Classname	Type	TypeAsString	TypeDisplayName	TypeShortDescription
Microsoft.SharePoint.SPFieldBoolean	Boolean	Boolean	Yes/No	Yes/No (check box)
Microsoft.SharePoint.SPFieldCalculated	Calculated	Calculated	Calculated	Calculated (calculation based on other columns)
Microsoft.SharePoint.SPFieldChoice	Choice	Choice	Choice	Choice (menu to choose from)
Microsoft.SharePoint.SPFieldComputed	Computed	Computed	Computed	Computed
Microsoft.SharePoint.SPFIeld	ContentTypeId	ContentTypeId	Content Type Id	Content Type Id
Microsoft.SharePoint.SPFieldCurrency	Currency	Currency	Currency	Currency ($, , ?)
Microsoft.SharePoint.SPFieldDateTime	DateTime	DateTime	Date and Time	Date and Time
Microsoft.SharePoint.SPFieldFile	File	File	File	File
Microsoft.SharePoint.SPField	Guid	Guid	Guid	Guid
Microsoft.SharePoint.SPFieldNumber	Integer	Integer	Integer	Integer
Microsoft.SharePoint.Portal.WebControls.BusinessDataField	Invalid	BusinessData	Business data	Business data
Microsoft.SharePoint.Publishing.Fields.ContentTypeIdFieldType	Invalid	ContentTypeIdFieldType	Content Type Id	Content Type Id
Microsoft.SharePoint.Publishing.Fields.HtmlField	Invalid	HTML	Publishing HTML	Full HTML content with formatting and constraints for publishing
Microsoft.SharePoint.Publishing.Fields.ImageField	Invalid	Image	Publishing Image	Image with formatting and constraints for publishing
Microsoft.SharePoint.Publishing.Fields.LayoutVariationsField	Invalid	LayoutVariationsField	Variations	Page Layout Variations
Microsoft.SharePoint.Publishing.Fields.LinkField	Invalid	Link	Publishing Hyperlink	Hyperlink with formatting and constraints for publishing
Microsoft.SharePoint.Publishing.Fields.PublishingScheduleEndDateField	Invalid	PublishingScheduleEndDateFieldType	Publishing Schedule End Date	Publishing Schedule End Date
Microsoft.SharePoint.Publishing.Fields.PublishingScheduleStartDateField	Invalid	PublishingScheduleStartDateFieldType	Publishing Schedule Start Date	Publishing Schedule Start Date
Microsoft.SharePoint.Publishing.Fields.SummaryLinkField	Invalid	SummaryLinks	SummaryLinks	Summary Links data
Microsoft.Office.Server.WebControls.FieldTypes.SPFieldTargetTo	Invalid	TargetTo	Audience Targeting	Audience Targeting
Microsoft.SharePoint.SPFieldLookup	Lookup	Lookup	Lookup	Lookup (information already on this site)
Microsoft.SharePoint.SPFieldLookup	Lookup	LookupMulti	Lookup	Lookup (information already on this site)
Microsoft.SharePoint.SPFieldNumber	Number	Number	Number	Number (1, 1.0, 100)
Microsoft.SharePoint.SPFieldRecurrence	Recurrence	Recurrence	Recurrence	Recurrence
Microsoft.SharePoint.SPFieldMultiLineText	Note	Note	Multiple lines of text	Multiple lines of text
Microsoft.SharePoint.SPFieldText	Text	Text	Single line of text	Single line of text
Microsoft.SharePoint.SPFieldUrl	URL	URL	Hyperlink or Picture	Hyperlink or Picture
Microsoft.SharePoint.SPFieldUser

Samples:

SPSite site = new SPSite("http://office2007");

    SPWeb web = site.OpenWeb();

    SPList list = web.Lists["Documenten"];

    // Add a new text field

    list.Fields.Add("NewTextField", SPFieldType.Text, false);

    // Add a new HTML field

    HtmlField htmlField = new HtmlField(

        list.Fields, "HTML", "NewHTMLField");

    list.Fields.Add(htmlField);

Check this out for more info...

Internal mechanism of showing indicator of long operations in Sharepoint using SPLongOperation

This is regarding the progress of process that we we usually see into sharepoint like while creating new site or so.
This is very informative blog
http://sadomovalex.blogspot.com/2010/07/internal-mechanism-of-showing-indicator.html

Open SPSite under RunWithElevatedPrivileges in proper zone

This is very good point when we are developing some custom code which is gona be used for a web application that is hosted on multiple zones like Intranet and Internet and so

http://sadomovalex.blogspot.com/2010/01/open-spsite-under-runwithelevatedprivil.html

Fire a button click event when user press enter key from textbox

It is very common requirement that when user clicks enter key. a specific submit button event should fire. Sadomovalex has explained it very well in following blog.

http://sadomovalex.blogspot.com/2009/12/post-login-form-without-submit-button.html

Camlex.NET simplifies creating of CAML queries for Windows SharePoint Services by using expression trees

This is very good technique when we need to work on CAML queries.
Contributors have done a great job.
Check this for more info on Camlex.NET
http://camlex.codeplex.com/
Check following link for good examples by Sadomovalex for camlex
http://sadomovalex.blogspot.com/2010/06/build-dynamic-caml-queries-based-on.html

Cross-site and cross-site collection navigation in Sharepoint

This is very good article about, how we can have common navigation for all sites of a site collection or even accross site collections too.
http://sadomovalex.blogspot.com/2010/05/cross-site-and-cross-site-collection.html

Disable WebPart form validators when page is in edit mode

There was a issue that my form validators gets fired when we are in Page edit mode or we are updating a webpart.

So we need to disable validators when page in in edit mode.

Solution
On WebPart user control

using Microsoft.SharePoint.WebPartPages;

protected void Page_Load(object sender, EventArgs e)
{
if (SPWebPartManager.GetCurrentWebPartManager(Page).DisplayMode != WebPartManager.BrowseDisplayMode)
validator.Enabled = false;
}

Showing image preview popup using div and javascript

There was a requirement to have a grid with the image thumbnail column and when we clicks that image, it should show the preview for same image in popup. That popup will have close button on right top.

Also if user selects the image as choice from combo the it should show real images if he selects the document then i need to show the one dummy image and on clicking that image it should open or save document.


Step 1:

<asp:GridView
...

<ItemTemplate>

<center>

<div runat="server" id="previewDocument" >

<a href="<%# DataBinder.Eval(Container.DataItem, "ItemUrl")%>" alt="Click to see preview." target="_blank" >

<img id="Img1" class="imgThumbnail" src="/_layouts/images/EgSpi/Default/document.gif" alt="Click to see preview." />

</a>

</div>

<div runat="server" id="previewImage" >

<img id="Img1" class="imgThumbnail" src="<%# DataBinder.Eval(Container.DataItem, "ItemUrl")%>" alt="Click to see preview." onclick="Large(this)" />

</div>

</center>

</ItemTemplate>

</asp:TemplateField>

....
</asp:GridView>

Step 2:

protected void grvResults_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
HtmlGenericControl docPreview = (HtmlGenericControl)e.Row.FindControl("previewDocument");
HtmlGenericControl imgPreview = (HtmlGenericControl)e.Row.FindControl("previewImage");

if (ddlObjectType.SelectedItem.Text == Enums.Object_Types.Document.ToString())
{
docPreview.Visible = true;
imgPreview.Visible = false;
}
else
{
docPreview.Visible = false;
imgPreview.Visible = true;
}
}
}

Step 3:

<script language="javascript">
function Large(obj) {
var imgHeight = 240;
var imgWidth = 240;
var imgBoxHeight = 250;

var imgbox = document.getElementById("imgbox");
imgbox.style.visibility = 'visible';

var divImageContainer = document.createElement("div");
divImageContainer.id = "imgContainer";
divImageContainer.innerHTML = '';

var divClose = document.createElement("div");
divClose.id = "imgclose";
divClose.innerHTML = "X";

if (divClose.addEventListener) {
divClose.addEventListener('onclick', Out, false);
} else {
divClose.attachEvent('onclick', Out);
}
imgbox.innerHTML = '';
imgbox.appendChild(divClose);

var img = document.createElement("img");
img.src = obj.src;

if ((img.height > imgHeight) || (img.width > imgWidth)) {
img.style.height = imgHeight + 'px';
img.style.width = imgWidth + 'px';
}
else {
divImageContainer.style.height = (imgBoxHeight - img.height) / 2 + 'px';
imgbox.appendChild(divImageContainer);
}

imgbox.appendChild(img);
imgbox.style.left = (obj.offsetParent.offsetLeft + 70) + 'px';
imgbox.style.top = (obj.offsetParent.offsetTop) + 'px';

}

function Out() {
document.getElementById("imgbox").style.visibility = 'hidden';
}

</script>

Step 4:

#imgbox
{
position: absolute;
border: 1px solid #999;
background: #FFFFFF;
filter: Alpha(Opacity=100);
visibility: hidden;
height: 250px;
width: 250px;
z-index: 50;
overflow: hidden;
text-align: center;
vertical-align:middle;
padding-top:5px;
padding-left:5px;
}

#imgclose
{
position: absolute;
top: 0px;
right: 0px;
background: #858585;
cursor: pointer;
padding: 6px;
font: bold 12px verdana, sans-serif;
color: white;
}

.imgThumbnail
{
border:none;
cursor:hand;
height:14px;
width:14px;
border: 1px solid #999;
padding:1px 1px 1px 1px;
}


----------------------------------- Enjoy ---------------------------------------