is it possible to set a DateTime filed to be null/empty when calling UpdateListItems?
I can set the field to a date value, but not set it to be empty.
Yes, it's possible.
I have tested with both a required and non-required datefield and setting the field to null works.
using (SPSite site = new SPSite("http://intranet"))
{
using (SPWeb web = site.OpenWeb("site"))
{
SPList list = web.Lists["MyCustomList"];
SPListItem item = list.Items.Add();
item["Title"] = "My Item";
item["UpdateDate"] = null;
item.Update();
list.Update();
}
}
Related
I'm using the following code to add an item to a list on the top level of my application but it is not adding anything, does anyone know why? Is there anything missing?
It doesn't return me any error, just doesn't add the item and the list remains empty.
The code is in the FeatureActivated method of the feature where the list instance is being deployed.
using (SPWeb web = site.OpenWeb())
{
web.AllowUnsafeUpdates = true;
SPList icons = web.GetList(path)
SPSecurity.RunWithElevatedPrivileges(delegate()
{
SPListItem icon = icons.Items.Add();
icon[SPBuiltInFieldId.Title] = "title";
icon[new Guid("d3429cc9-adc4-439b-84a8-5679070f84cb")] = "class1";
icons.Update();
}
you have to call the Update() method of the icon object, not icons.
I found out there are 2 ways of successfully add an item to a list:
Like Andreas Scharf said:
SPListItem item = list.Items.Add();
item["Title"] = "some title";
item.Update();
Some other way using the AddItem() instead of the Add() from the items collection
SPListItem item = list.AddItem();
item["Title"] = "some title"; // Add item's field values
item.Update(); //also the item is updated, not the list
I have custom List which has image field. I have to display the image through the object modelling code.
Which Control I need to use to display the image in a webpart and which property I need to assign it for.
[Guid("207cea76-b1ee-4b86-9638-00c22d3d9398")]
public class News : System.Web.UI.WebControls.WebParts.WebPart
{
Label lblTitle;
ImageField imgNews;
Label lblDescription;
public News()
{
}
protected override void CreateChildControls()
{
base.CreateChildControls();
lblTitle = new Label();
imgNews = new ImageField();
lblDescription = new Label();
string siteURL = "http://my-dev-box-har";
using (SPSite site = new SPSite(siteURL))
{
using (SPWeb web = site.OpenWeb())
{
SPListItemCollection list = web.Lists["News"].Items ;
foreach (SPListItem item in list)
{
lblTitle.Text = item["Title"].ToString();
lblDescription.Text = item["Description"].ToString();
imgNews. = item[""].ToString();
Controls.Add(lblTitle);
Controls.Add(lblDescription);
}
}
}
}
}
}
I don't know wheather to use image or Imagefield control to display my image form the sharepoint custom list.
Could anybody point me in right direction please.
Thank you
Hari
This is the most simple example I could come up with:
using System.ComponentModel;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
namespace TestPictureWebPart.PicWebPart
{
[ToolboxItemAttribute(false)]
public class PicWebPart : WebPart
{
protected override void CreateChildControls()
{
SPList list = SPContext.Current.Web.Lists["ImageList"];
SPListItemCollection items = list.Items;
foreach (SPListItem item in items)
{
string title = item[SPBuiltInFieldId.Title].ToString(); // or string title = item.Title;
SPFieldUrlValue picture = new SPFieldUrlValue(item["MyPicture"].ToString());
Image image = new Image();
image.ToolTip = title;
image.ImageUrl = picture.Url;
Controls.Add(image);
}
}
}
}
Just a tip: it's always better to use SPBuiltInFieldId to access out-of-the-box columns in SharePoint.
Also, in your example code... if you have more than one listitem in your list, you are in trouble. You will use the same web controls (the labels for example) for each listitem and add them to the Controls collection in every iteration.
Looking for a snippet of code.
The "People picker" control is used by SP when a column is of type User
so, the following snippet will add one such column:
using (SPWeb oWebsite = SPContext.Current.Site.AllWebs["MySite"])
{
SPFieldCollection collFields = oWebsite.Lists["MyList"].Fields;
collFields.Add("MyField", Microsoft.SharePoint.SPFieldType.User, false);
}
I was successfully able to update one of the fields (which was of type boolean) from infopath for library item using sharepoint object Model as if it was a list item.
But for another field which is of type text, the same code just gets executed but does not change the field value !!!!
I am using following code, which works for that boolean field but for another field of type string , not sure why it is not working. Any idea ?
SPSecurity.RunWithElevatedPrivileges(delegate()
{
SPWeb web;
SPSite site = new SPSite("http://sharepointsite");
web = site.OpenWeb();
SPList formLibList = web.Lists["FormLibraryName"];
SPQuery query = new SPQuery(); query.Query = "<Where><Eq><FieldRef Name='Title' /><Value Type='Text'>" + titleName + "</Value></Eq></Where>";
web.Site.WebApplication.FormDigestSettings.Enabled = false;
web.AllowUnsafeUpdates = true;
SPListItemCollection col = formLibList.GetItems(query);
if (col.Count > 0)
{
col[0]["CustomerName"] = "test customer name";
col[0].Update();
}
web.Site.WebApplication.FormDigestSettings.Enabled = true; web.AllowUnsafeUpdates = false;
});
Thanks,
Nikhil
I had to declare SPListItem and set it instead of directly modifying list item collection.
It's not an answer to your question (you already found the solution yourself), but you may want to put your SPSite and SPWeb objects in a using block. In your example code you are not disposing them, which results in a memory leak. The correct way would be like this:
SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPSite site = new SPSite("http://sharepointsite"))
{
using (SPWeb web = site.OpenWeb())
{
// the rest of your code
}
}
});
Using the SharePoint SDK, I'm attempting to retrieve a list and display the contents in a composite control. The list is audience aware and I'd like to maintain that in my control. How can I go about getting this list, filtered by audience, using the SharePoint SDK? Here's some of the code I'm working with:
SPWeb currentWeb = SPContext.Current.Site.RootWeb;
SPList shortcuts = currentWeb.Lists["Shortcuts"];
Here's some of the code I'm using now, and it's not quite working for me. According to how the audiences are set up, I should be getting results:
protected override void CreateChildControls()
{
dropdown = new DropDownList();
dropdown.Items.Add(new ListItem("Select...", ""));
SPWeb currentWeb = SPContext.Current.Site.RootWeb;
SPList shortcuts = currentWeb.Lists["Shortcuts"];
ServerContext context = ServerContext.GetContext(currentWeb.Site);
AudienceManager audManager = new AudienceManager(context);
AudienceCollection audiences = audManager.Audiences;
AudienceLoader audienceLoader = AudienceLoader.GetAudienceLoader();
foreach (SPListItem listItem in shortcuts.Items)
{
string audienceFieldValue = (string)listItem["Target Audiences"];
if (AudienceManager.IsCurrentUserInAudienceOf(audienceLoader, audienceFieldValue, false))
{
dropdown.Items.Add(new ListItem(listItem.Title, listItem.Url));
}
}
Controls.Add(dropdown);
base.CreateChildControls();
}
On:
if (AudienceManager.IsCurrentUserInAudienceOf(audienceLoader, audienceFieldValue, false))
It's never returning true, even when it should be.
Here's a more succinct code snippet. Main changes are removal of unused objects, and a more efficient version of the foreach loop.
protected override void CreateChildControls()
{
dropdown = new DropDownList();
dropdown.Items.Add(new ListItem("Select...", ""));
SPWeb currentWeb = SPContext.Current.Site.RootWeb;
SPListItemCollection scItems = currentWeb.Lists["Shortcuts"].Items;
AudienceLoader audienceLoader = AudienceLoader.GetAudienceLoader();
// Iterate over a copy of the collection to prevent multiple queries to the list
foreach (SPListItem listItem in scItems)
{
string audienceFieldValue = (string)listItem["Target Audiences"];
if (AudienceManager.IsCurrentUserInAudienceOf(audienceLoader, audienceFieldValue, false))
{
dropdown.Items.Add(new ListItem(listItem.Title, listItem.Url));
}
}
Controls.Add(dropdown);
base.CreateChildControls();
}
Here's a code snippet that maybe could be of use, to determine each items audience:
SPList shortcuts = currentWeb.Lists["Shortcuts"];
SPListItemCollection items = list.Items;
Audience siteAudience;
ServerContext context = ServerContext.GetContext(site);
AudienceManager audManager = new AudienceManager(context);
foreach (SPListItem item in items)
{
string ID = item["Target Audiences"].ToString();
string NewID = ID.Remove(36);
Guid guid = new Guid(NewID);
siteAudience = audManager.GetAudience(guid);
}