关于上传的种种（三）

专注SharePoint

<div id="cnblogs_post_body">       上两篇说了SharePoint自带上传的简单用法，这篇讲述一下开发自定义的字段类型来做上传。所有的代码都是我昨晚写的（有BUG），没有使用公司原本的上传部件。效果如下图：
  
   
  浏览状态图：
  
   
  只是实现了简单的上传功能，当然可以扩展并完善。
  下面介绍用到的几个文件：
  1、fldtypes_fieldupload.xml
  

   <?xml version="1.0" encoding="utf-8" ?>     
<FieldTypes>      
  <FieldType>      
    <Field Name="TypeName">FieldUpload</Field>      
    <Field Name="ParentType">Note</Field>      
    <Field Name="TypeDisplayName">上传</Field>      
    <Field Name="TypeShortDescription">上传</Field>
        <Field Name="UserCreatable">TRUE</Field>     
    <Field Name="ShowInListCreate">TRUE</Field>      
    <Field Name="ShowInSurveyCreate">TRUE</Field>      
    <Field Name="ShowInDocumentLibraryCreate">TRUE</Field>      
    <Field Name="ShowInColumnTemplateCreate">TRUE</Field>      
    <Field Name="FieldTypeClass">SharePointProject1.FileUploadCustomField,$SharePoint.Project.AssemblyFullName$</Field>      
    <Field Name="FieldEditorUserControl">/_controltemplates/FileUploadProperty.ascx</Field>      
    <PropertySchema>      
      <Fields>      
        <Field Name="UploadDocumentLibrary" DisplayName="Document Library" Type="Text" Hidden="True"/>      
      </Fields>      
    </PropertySchema>      
  </FieldType>      
</FieldTypes>      

     

  2、FileUploadCustomField.cs
  

   public class FileUploadCustomField : SPFieldMultiLineText     
    {      
        public FileUploadCustomField(SPFieldCollection fields, string fieldName) : base(fields, fieldName) { Init(); }      
        public FileUploadCustomField(SPFieldCollection fields, string typeName, string disName) : base(fields, typeName, disName) { Init(); }
            private string _UploadDocumentLibrary = "";     
        public string UploadDocumentLibrary      
        {      
            get      
            {      
                return _UploadDocumentLibrary;      
            }      
            set      
            {      
                this.SetCustomProperty("UploadDocumentLibrary", value);      
                _UploadDocumentLibrary = value;      
            }      
        }
            private void Init()     
        {      
            this.UploadDocumentLibrary = this.GetCustomProperty("UploadDocumentLibrary").ToStr();      
        }
            public override void Update()     
        {      
            this.SetCustomProperty("UploadDocumentLibrary", this.UploadDocumentLibrary);      
            this.RichText = true;      
            this.RichTextMode = SPRichTextMode.FullHtml;      
            base.Update();      
        }
         
        public override BaseFieldControl FieldRenderingControl      
        {      
            get      
            {      
                BaseFieldControl fieldControl = new FileUploadCustomFieldControl();      
                fieldControl.FieldName = InternalName;      
                return fieldControl;      
            }      
        }
            public override string GetFieldValueAsHtml(object value)     
        {      
            return base.GetFieldValueAsHtml(HttpUtility.HtmlDecode(value.ToStr()));      
        }
           
    }
     

  3、FileUploadCustomFieldControl.cs
  

   {     
        FileUpload fileup = null;      
        Button btn = null;      
        Literal litWarn = null;
     
            protected override void CreateChildControls()     
        {      
            if (this.ControlMode != SPControlMode.Display)      
            {      
                HtmlTable htable = new HtmlTable();
         
                fileup = new FileUpload();
                    //HttpContext.GetGlobalResourceObject("myCustom", "fileup-btn").ToString();
                    string btnText = SPUtility.GetLocalizedString("$Resources:myCustom,fileup_btn;", "myCustom", SPContext.Current.Web.Language);
                    btn = new Button();     
                btn.Text = btnText;      
                btn.Click += new EventHandler(btn_Click);      
                litWarn = new Literal();
     
         
                HtmlTableCell btncell = new HtmlTableCell();      
                btncell.Controls.Add(fileup);      
                btncell.Controls.Add(btn);      
                btncell.Controls.Add(litWarn);
                    HtmlTableRow btnrow = new HtmlTableRow();
                    btnrow.Cells.Add(btncell);     
                htable.Rows.Add(btnrow);
                    this.Controls.Add(htable);     
            }
                base.CreateChildControls();     
        }
         
        public override object Value      
        {      
            get      
            {      
                this.EnsureChildControls();
                    return ViewState["filepath"];     
            }      
            set      
            {      
                this.EnsureChildControls();
                    AddFilePath(this.ItemFieldValue.ToStr());     
            }      
        }
            protected void btn_Click(object sender, EventArgs e)     
        {      
            litWarn.Text = "";
                if (fileup.FileName == "")     
            {      
                if (ViewState["filepath"] != null)      
                {      
                    AddFilePath(ViewState["filepath"].ToStr());      
                }
         
                litWarn.Text = "尚未选择上传文件";      
                return;      
            }
                Stream st = fileup.FileContent;
                FileUploadCustomField _field = (FileUploadCustomField)this.Field;
                SPList list = SPContext.Current.Web.GetListFromUrl(_field.UploadDocumentLibrary);
                SPDocumentLibrary spdoc = list as SPDocumentLibrary;
         
            SPFile fl = spdoc.RootFolder.Files.Add(fileup.FileName, st, true);
                if (fl != null)     
            {      
                string filepath = "<a href='" + fl.ServerRelativeUrl + "'>" + fileup.FileName + "</a>";
                    AddFilePath(filepath);
                }     
        }
            private void AddFilePath(string filepath)     
        {      
            HtmlTable htable = new HtmlTable();
                HtmlTableCell filecell = new HtmlTableCell();
                filecell.Controls.Add(new LiteralControl(filepath));
                HtmlTableRow filerow = new HtmlTableRow();     
            filerow.Cells.Add(filecell);
         
            HtmlTableCell delcell = new HtmlTableCell();
                LinkButton lbtn = new LinkButton();     
            lbtn.Text = "删除";      
            lbtn.Click += new EventHandler(lbtn_Click);
         
            delcell.Controls.Add(lbtn);      
            filerow.Cells.Add(delcell);
                htable.Rows.Add(filerow);
                ViewState["filepath"] = filepath;
                this.Controls.Add(htable);     
        }
            void lbtn_Click(object sender, EventArgs e)     
        {
     
            }
            protected override void RenderFieldForDisplay(System.Web.UI.HtmlTextWriter output)     
        {      
            output.Write(this.ItemFieldValue);      
        }      
    }

  4、FileUploadProperty.ascx
  

   <%@ Register TagPrefix="wssuc" TagName="InputFormControl" Src="~/_controltemplates/InputFormControl.ascx" %>     
<%@ Register TagPrefix="wssuc" TagName="InputFormSection" Src="~/_controltemplates/InputFormSection.ascx" %>      
<wssuc:InputFormSection runat="server" id="UploadControl" Title="属性设置">      
    <template_inputformcontrols>      
         <wssuc:InputFormControl runat="server" LabelText="Select document library">      
             <Template_Control>      
                <asp:DropDownList ID="ddlDocLibs" runat="server" CssClass="ms-ButtonheightWidth" Width="250px" />      
             </Template_Control>      
         </wssuc:InputFormControl>      
     </template_inputformcontrols>      
</wssuc:InputFormSection>
     

  5、FileUploadProperty.ascx.cs
  

   public partial class FileUploadProperty : UserControl, IFieldEditor     
{      
    protected void Page_Load(object sender, EventArgs e)      
    {
        }
        FileUploadCustomField _field = null;
        public bool DisplayAsNewSection     
    {      
        get { return true; }      
    }
        public void InitializeWithField(SPField field)     
    {      
        this._field = field as FileUploadCustomField;      
    }
        public void OnSaveChange(SPField field, bool isNewField)     
    {      
        FileUploadCustomField myField = field as FileUploadCustomField;      
        myField.UploadDocumentLibrary = ddlDocLibs.SelectedItem.Value;      
    }
        protected override void CreateChildControls()     
    {      
        base.CreateChildControls();      
        SPListCollection objLists = SPContext.Current.Web.Lists;      
        foreach (SPList objList in objLists)      
        {      
            if (objList is SPDocumentLibrary)      
            {      
                ddlDocLibs.Items.Add(new ListItem(objList.Title, objList.DefaultViewUrl));      
            }      
        }
            if (!IsPostBack && _field != null)     
        {      
            if (!String.IsNullOrEmpty(_field.UploadDocumentLibrary))      
            {      
                foreach (ListItem item in ddlDocLibs.Items)      
                {      
                    item.Selected = false;      
                }
                    ddlDocLibs.Items.FindByValue(_field.UploadDocumentLibrary).Selected = true;     
            }      
        }      
    }      
}      

     

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