我正在为SharePoint 2010制作自定义活动。当我在SharePoint Designer中删除活动并为参数提供值时，我得到一个神秘的验证错误，只是说：
此操作需要缺少参数。
以下是该操作的源代码：
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Workflow.ComponentModel;
using System.Workflow.Activities;
using System.Workflow.ComponentModel.Compiler;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WorkflowActions;
namespace SharePoint.Activities.IO
{
public partial class CopyFile : SequenceActivity
{
public CopyFile()
{
InitializeComponent();
}
public static DependencyProperty SourceDirectoryProperty = DependencyProperty.Register("SourceDirectory", typeof(string), typeof(CopyFile));
public static DependencyProperty TargetDirectoryProperty = DependencyProperty.Register("TargetDirectory", typeof(string), typeof(CopyFile));
public static DependencyProperty ActionResultProperty = DependencyProperty.Register("ActionResult", typeof(string), typeof(CopyFile));
public static DependencyProperty CreateDateProperty = DependencyProperty.Register("CreateDate", typeof(DateTime), typeof(CopyFile));
public static DependencyProperty CompletionDateProperty = DependencyProperty.Register("CompletionDate", typeof(DateTime), typeof(CopyFile));
public static DependencyProperty WFContextProperty = DependencyProperty.Register("WFContext", typeof(WorkflowContext), typeof(CopyFile));
[Description("Path the files to perform the operation on")]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Required)]
public string SourceDirectory
{
get { return (string)GetValue(SourceDirectoryProperty); }
set { SetValue(SourceDirectoryProperty, value); }
}
[Description("Path the files are copied to")]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Required)]
public string TargetDirectory
{
get { return (string)GetValue(TargetDirectoryProperty); }
set { SetValue(TargetDirectoryProperty, value); }
}
[Description("Once the the operation completes, this is set to OK or the exception information")]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Optional)]
public string ActionResult
{
get { return (string)GetValue(ActionResultProperty); }
set { SetValue(ActionResultProperty, value); }
}
[Description("When the request was created")]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Optional)]
public DateTime CreateDate
{
get { return (DateTime)GetValue(CreateDateProperty); }
set { SetValue(CreateDateProperty, value); }
}
[Description("When execution stoped")]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Optional)]
public DateTime CompletionDate
{
get { return (DateTime)GetValue(CompletionDateProperty); }
set { SetValue(CompletionDateProperty, value); }
}
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
public WorkflowContext WFContext
{
get { return (WorkflowContext)GetValue(WFContextProperty); }
set { SetValue(WFContextProperty, value); }
}
//protected override void Initialize(IServiceProvider provider)
//{
// TraceIn();
// base.Initialize(provider);
// TraceOut();
//}
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
TraceIn();
Debugger.Break();
var isSiteAdmin = false;
CreateDate = DateTime.Now;
try
{
// Needs administrative credentials to get the web application properties ino
SPSecurity.RunWithElevatedPrivileges(delegate
{
using (var site = new SPSite(WFContext.Site.ID))
{
using (var web = site.AllWebs[WFContext.Web.ID])
{
isSiteAdmin = web.CurrentUser.IsSiteAdmin;
if (string.IsNullOrEmpty(SourceDirectory)) throw new ArgumentException("SourceDirectory cannot be null or empty");
if (!Directory.Exists(SourceDirectory)) throw new DirectoryNotFoundException("Could not find source directory: \"" + SourceDirectory + "\"");
if (string.IsNullOrEmpty(TargetDirectory)) throw new ArgumentException("TargetDirectory cannot be null or empty");
if (!Directory.Exists(TargetDirectory)) throw new DirectoryNotFoundException("Could not find target directory: \"" + TargetDirectory + "\"");
// Do something
Debug.WriteLine(string.Format("Doing something amazing from {0} and moving it to {1}", SourceDirectory, TargetDirectory));
}
}
});
ActionResult = "OK";
}
catch (Exception ex)
{
ActionResult = isSiteAdmin ? ex.ToString() : ex.Message;
}
CompletionDate = DateTime.Now;
var result = base.Execute(executionContext);
TraceOut();
return result;
}
private static void TraceIn()
{
Trace("Entering");
}
private static void TraceOut()
{
Trace("Exiting");
}
private static void Trace(string direction)
{
Debugger.Launch();
var stackTrace = new StackTrace(2, false);
var frame = stackTrace.GetFrame(0);
Debug.WriteLine(direction + " " + frame.GetMethod().Name);
}
}
}
这是.action文件。
<?xml version="1.0" encoding="utf-8" ?>
<WorkflowInfo>
<Actions
Sequential="then"
Parallel="and">
<Action
Name="IO Activities"
ClassName="SharePoint.Activities.IO.CopyFile"
Assembly="SharePoint.Activities.IO, Version=1.0.0.0, Culture=neutral, PublicKeyToken=abfb622251cf6982"
Category="Custom Actions"
AppliesTo="all">
<RuleDesigner
Sentence="CopyFiles from %1 to %2">
<FieldBind
Field="SourceDirectory"
DesignerType="String"
Id="1"/>
<FieldBind
Field="TargetDirectory"
DesignerType="String"
Id="2"/>
</RuleDesigner>
<Parameters>
<Parameter
Name="SourceDirectory"
Type="System.String, mscorlib"
Direction="In"
DesignerType="StringBuilder"
Description="Directory where the source files are to move" />
<Parameter
Name="TargetDirectory"
Type="System.String, mscorlib"
Direction="In"
DesignerType="StringBuilder"
Description="Directory where the files will be placed" />
<Parameter
Name="ActionResult"
Type="System.String, mscorlib"
Direction="Optional"
DesignerType="Hide" />
<Parameter
Name="CreateDate"
Type="System.DateTime, mscorlib"
Direction="Optional"
DesignerType="Hide" />
<Parameter
Name="CompletionDate"
Type="System.DateTime, mscorlib"
Direction="Optional"
DesignerType="Hide" />
<Parameter
Name="WFContext"
Type="Microsoft.SharePoint.WorkflowActions.WorkflowContext, Microsoft.SharePoint.WorkflowActions"
DesignerType="Hide" />
</Parameters>
</Action>
</Actions>
</WorkflowInfo>
以下是指向my post on social.msdn.microsoft.com的链接。
我甚至尝试通过注释掉.actions文件中的参数，类中的属性以及注释掉DependencyProperties来删除所有参数。我仍然得到同样的错误。
答案 0 :(得分：0)
最终，看起来问题（在我撕下项目并重新开始之后）是一个不正确的设计师类型并且缺失了。
这是旧代码：
<FieldBind Field="Result" DesignerType="TextArea" Text="Action result message; returns OK on success" Id="3" />
这是正确的代码：
<FieldBind Field="Result" DesignerType="ParameterNames" Text="Action result message; returns OK on success" Id="3" />
一旦做出改变，一切似乎都在起作用。