sharepoint2007重写SaveButton的方法已经有了，2010只要改几个地方就可以了
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using Microsoft.SharePoint;
using System.Web.UI.WebControls;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.Utilities;
using System.Globalization;
using System.Collections;
using System.Web;
namespace ***.***.***.WebControls
{
public class BeforeSaveItemArgs : EventArgs
{
public bool CanRedirect { get; set; }
public SPListItem ListItem { get; set; }
public bool Cancel { get; set; }
}
public class AfterSaveItemArgs : EventArgs
{
public SPListItem ListItem { get; set; }
public bool Success { get; set; }
}
public delegate void BeforeSaveItemHandler(object sender, BeforeSaveItemArgs e);
public delegate void AfterSaveItemHandler(object sender, AfterSaveItemArgs e);
public class UpdateButton : Microsoft.SharePoint.WebControls.SaveButton//FormComponent
{
private SPContentType m_ct;
private SPContentType m_oldCt;
private bool _canRedirect = true;
private static readonly object EventBeforeSaveItem = new object();
private static readonly object EventAfterSaveItem = new object();
public event BeforeSaveItemHandler OnBeforeSaveItem
{
add
{
base.Events.AddHandler(EventBeforeSaveItem, value);
}
remove
{
base.Events.RemoveHandler(EventBeforeSaveItem, value);
}
}
public event AfterSaveItemHandler OnAfterSaveItem
{
add
{
base.Events.AddHandler(EventAfterSaveItem, value);
}
remove
{
base.Events.RemoveHandler(EventAfterSaveItem, value);
}
}
protected virtual void DoBeforeSaveItem(BeforeSaveItemArgs e)
{
BeforeSaveItemHandler handler = (BeforeSaveItemHandler)base.Events[EventBeforeSaveItem];
if (handler != null)
{
handler(this, e);
_canRedirect = e.CanRedirect;
}
}
protected virtual void DoAfterSaveItem(AfterSaveItemArgs e)
{
AfterSaveItemHandler handler = (AfterSaveItemHandler)base.Events[EventAfterSaveItem];
if (handler != null)
{
handler(this, e);
}
}
protected override void CreateChildControls()
{
base.CreateChildControls();
}
protected override bool SaveItem()
{
SPListItem item = base.ItemContext.ListItem;
BeforeSaveItemArgs beforeSaveArgs =
new BeforeSaveItemArgs() { ListItem = item, Cancel = false, CanRedirect = false };
DoBeforeSaveItem(beforeSaveArgs);
if (!beforeSaveArgs.Cancel)
{
bool result = base.SaveItem();
AfterSaveItemArgs afterSaveArgs = new AfterSaveItemArgs()
{
ListItem = item,
Success = result
};
DoAfterSaveItem(afterSaveArgs);
return result;
}
else
return false;
}
public bool CanRedirect
{
get { return _canRedirect; }
set { _canRedirect = value; }
}
public bool Update()
{
bool flag = false;
this.Page.Validate();
if (this.Page.IsValid)
{
try
{
flag = SaveItem();
}
catch (Exception ex)
{
throw new SPException(ex.Message, ex);
}
string redirectUrl = base.RedirectUrl;
this.Context.Response.Write("<script type='text/javascript'>window.frameElement.commitPopup();</script>");
this.Context.Response.Flush();
this.Context.Response.End();
}
return flag;
}
#region internal method
private static IFormatProvider s_ifp;
internal static IFormatProvider FormatProvider
{
get
{
if (s_ifp == null)
{
StringWriter writer = new StringWriter(
System.Globalization.CultureInfo.InvariantCulture);
s_ifp = writer.FormatProvider;
}
return s_ifp;
}
}
internal SPContentType GetContentTypeThroughQueryString()
{
string str = this.Page.Request.QueryString["ContentTypeId"];
if (str != null)
{
SPContentType type2;
try
{
if (str.StartsWith("0x"))
{
SPContentTypeId contentTypeId = new SPContentTypeId(str);
SPContentType type = this.List.ContentTypes[contentTypeId];
if (type == null)
{
return this.List.ContentTypes[this.List.ContentTypes.BestMatch(contentTypeId)];
}
return type;
}
int num = int.Parse(str, UpdateButton.FormatProvider);
type2 = this.List.ContentTypes[num];
}
catch (ArgumentException)
{
return null;
}
catch (SPException)
{
return null;
}
return type2;
}
return null;
}
internal SPContentType ContentType
{
get
{
if (this.m_ct == null)
{
if (this.Item is SPListItem)
{
if (this.ItemContext.FormContext.FormMode != SPControlMode.Display)
{
this.m_ct = this.GetContentTypeThroughQueryString();
if (this.m_ct == null)
{
if (this.ItemContext.FormContext.FormMode != SPControlMode.Edit)
{
foreach (SPContentType type in this.List.ContentTypes)
{
if (!(type.Id.Parent == SPBuiltInContentTypeId.Folder))
{
this.m_ct = type;
break;
}
}
}
else
this.m_ct = this.OldContentType;
}
}
else
{
this.m_ct = this.OldContentType;
}
}
///00D2////
if ((this.m_ct == null) && (this.List.ContentTypes.Count > 0))
{
this.m_ct = this.List.ContentTypes[0];
}
}
return this.m_ct;
}
}
internal bool IsCurrentItemVersion
{
get
{
if (this.ItemVersion != null)
return (this.ItemVersion.VersionId == 0) ||
(((int)this.ListItem["_UIVersion"]) == this.ItemVersion.VersionId);
else
return (int)(this.ListItem["_UIVersion"]) == 0;
}
}
internal SPListItemVersion ItemVersion
{
get { return this.ItemContext.ListItemVersion; }
}
private SPContentType OldContentType
{
get
{
if (this.m_oldCt == null)
{
if ((this.ItemContext.FormContext.FormMode != SPControlMode.Edit)
&& (this.ItemContext.FormContext.FormMode != SPControlMode.Display))
{
return null;
}
if (this.Item is SPListItem)
{
object obj2 = null;
try
{
obj2 = this.ListItem["ContentTypeId"];
//if (!this.IsCurrentItemVersion)
//{
// obj2 = this.ItemContext.ListItemVersion["ContentTypeId"];
//}
//else
//{
// obj2 = this.ListItem["ContentTypeId"];
//}
}
catch (ArgumentException)
{
}
if (obj2 != null)
{
SPContentTypeId id = (SPContentTypeId)obj2;
this.m_oldCt = this.List.ContentTypes[id];
}
}
}
else
{
return this.m_oldCt;
}
return this.m_oldCt;
}
}
#endregion
}
public class SaveButton : UpdateButton
{
protected override bool OnBubbleEvent(object source, EventArgs e)
{
bool flag = false;
if (e is CommandEventArgs)
{
CommandEventArgs args = e as CommandEventArgs;
if (args.CommandName == "SaveItem")
{
flag = this.Update();
return flag;
}
}
return flag;
}
}
}
但保存前对一些特殊字段校验怎么办呢？因为这个savebutton只能回到新建的页面，那么填写的都白填写了，本来想在代码里面控制一下的（就是那个写Cancel的原因）但发现没什么用。
最后用什么搞定了呢？用了一个CustomValidator就可以了。
<asp:CustomValidator ID="CustomValidator1" runat="server"
ControlToValidate="" EnableClientScript="False"
ErrorMessage="输入有错误"
onservervalidate="CustomValidator1_ServerValidate"></asp:CustomValidator>
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{
if (Convert.ToDateTime(FormField15.Value)>System.DateTime.Now)
{
args.IsValid = false;
}
}
这样这个savebutton在保存前，保存后就都好用了。，先这么写，后面写详细点。
