DynamicField.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » DynamicData » C# / CSharp Open Source

//
// DynamicField.cs
//
// Author:
//  Atsushi Enomoto <atsushi@ximian.com>
//      Marek Habersack <mhabersack@novell.com>
//
// Copyright (C) 2008-2009 Novell Inc. http://novell.com
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Globalization;
using System.Security.Permissions;
using System.Security.Principal;
using System.Web.Caching;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace System.Web.DynamicData{
  [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  public class DynamicField : DataControlField, IAttributeAccessor, IFieldFormattingOptions
  {
    MetaColumn myColumn;
    Dictionary <string, string> attributes;
    
    public DynamicField ()
    {
      DataFormatString = String.Empty;
      HtmlEncode = true;
      NullDisplayText = String.Empty;
    }
    
    public bool ApplyFormatInEditMode {
      get; set;
    }

    public bool ConvertEmptyStringToNull {
      get; set;
    }

    public virtual string DataField {
      get { return ViewState.GetString ("_DataField", String.Empty); }
      set {
        ViewState ["_DataField"] = value;
        OnFieldChanged ();
      }
    }    

    public string DataFormatString {
      get; set;
    }

    public override string HeaderText {
      get {
        string s = ViewState.GetString ("headerText", null);
        if (s != null)
          return s;

        MetaColumn column = MyColumn;
        if (column != null)
          return column.DisplayName;
        
        return DataField;
      }
      
      set { base.HeaderText = value; }
    }    

    public bool HtmlEncode {
      get; set;
    }

    MetaColumn MyColumn {
      get {
        if (myColumn != null)
          return myColumn;
        Control owner = Control;
        if (owner == null)
          return null;
        
        MetaTable table = owner.FindMetaTable ();
        if (table == null)
          return null;

        myColumn = table.GetColumn (DataField);
        return myColumn;
      }
    }
    
    public string NullDisplayText {
      get; set;
    }

    public override string SortExpression {
      get {
        string s = ViewState.GetString ("sortExpression", null);
        if (s != null)
          return s;

        MetaColumn column = MyColumn;
        if (column != null)
          return column.SortExpression;

        return String.Empty;
      }
      
      set { base.SortExpression = value; }
    }    

    public virtual string UIHint {
      get {
        string s = ViewState.GetString ("uiHint", null);
        if (s == null)
          return String.Empty;
        return s;
      }
      
      set {
        ViewState ["uiHint"] = value;
        OnFieldChanged ();
      }
    }

    [MonoTODO]
    protected override void CopyProperties (DataControlField newField)
    {
      throw new NotImplementedException ();
    }

    [MonoTODO]
    protected override DataControlField CreateField ()
    {
      throw new NotImplementedException ();
    }

    [MonoTODO]
    public override void ExtractValuesFromCell (IOrderedDictionary dictionary, DataControlFieldCell cell, DataControlRowState rowState, bool includeReadOnly)
    {
      throw new NotImplementedException ();
    }

    public string GetAttribute (string key)
    {
      if (attributes == null)
        return null;

      string ret;
      if (attributes.TryGetValue (key, out ret))
        return ret;

      return null;
    }

    public override void InitializeCell (DataControlFieldCell cell, DataControlCellType cellType, DataControlRowState rowState, int rowIndex)
    {
      if (cellType == DataControlCellType.Header || cellType == DataControlCellType.Footer) {
        base.InitializeCell (cell, cellType, rowState, rowIndex);
        return;
      }

      DynamicControl dc = new DynamicControl ();
      dc.ApplyFormatInEditMode = ApplyFormatInEditMode;
      dc.ConvertEmptyStringToNull = ConvertEmptyStringToNull;
      dc.Column = MyColumn;
      dc.DataField = DataField;
      dc.DataFormatString = DataFormatString;
      dc.HtmlEncode = HtmlEncode;
      dc.Mode = (rowState & DataControlRowState.Edit) != 0 ? DataBoundControlMode.Edit :
        (rowState & DataControlRowState.Insert) != 0 ? DataBoundControlMode.Insert : DataBoundControlMode.ReadOnly;
      dc.NullDisplayText = NullDisplayText;
      dc.UIHint = UIHint;
      dc.InternalSetAttributes (attributes);
      
      cell.Controls.Add (dc);
    }

    public void SetAttribute (string key, string value)
    {
      if (attributes == null)
        attributes = new Dictionary <string, string> ();

      if (attributes.ContainsKey (key))
        attributes [key] = value;
      else
        attributes.Add (key, value);
    }
  }
}