//
// System.Web.UI.WebControls.HyperLinkField.cs
//
// Authors:
// Lluis Sanchez Gual (lluis@novell.com)
//
// (C) 2005 Novell, Inc (http://www.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.
//
#if NET_2_0
using System.Collections;
using System.Collections.Specialized;
using System.Web.UI;
using System.ComponentModel;
using System.Security.Permissions;
using System.Reflection;
namespace System.Web.UI.WebControls{
[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class HyperLinkField : DataControlField
{
PropertyDescriptor textProperty;
PropertyDescriptor[] urlProperties;
static string[] emptyFields;
public override bool Initialize (bool sortingEnabled, Control control)
{
return base.Initialize (sortingEnabled, control);
}
[EditorAttribute ("System.Web.UI.Design.WebControls.DataFieldEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
[TypeConverterAttribute (typeof(StringArrayConverter))]
[WebCategoryAttribute ("Data")]
[DefaultValueAttribute (null)]
public virtual string[] DataNavigateUrlFields {
get {
object ob = ViewState ["DataNavigateUrlFields"];
if (ob != null) return (string[]) ob;
if (emptyFields == null) emptyFields = new string[0];
return emptyFields;
}
set {
ViewState ["DataNavigateUrlFields"] = value;
OnFieldChanged ();
}
}
[DefaultValueAttribute ("")]
[WebCategoryAttribute ("Data")]
public virtual string DataNavigateUrlFormatString {
get {
object ob = ViewState ["DataNavigateUrlFormatString"];
if (ob != null) return (string) ob;
return "";
}
set {
ViewState ["DataNavigateUrlFormatString"] = value;
OnFieldChanged ();
}
}
[WebCategoryAttribute ("Data")]
[DefaultValueAttribute ("")]
[TypeConverterAttribute ("System.Web.UI.Design.DataSourceViewSchemaConverter, " + Consts.AssemblySystem_Design)]
public virtual string DataTextField {
get {
object ob = ViewState ["DataTextField"];
if (ob != null) return (string) ob;
return "";
}
set {
ViewState ["DataTextField"] = value;
OnFieldChanged ();
}
}
[DefaultValueAttribute ("")]
[WebCategoryAttribute ("Data")]
public virtual string DataTextFormatString {
get {
object ob = ViewState ["DataTextFormatString"];
if (ob != null) return (string) ob;
return "";
}
set {
ViewState ["DataTextFormatString"] = value;
OnFieldChanged ();
}
}
[DefaultValueAttribute ("")]
[EditorAttribute ("System.Web.UI.Design.UrlEditor, " + Consts.AssemblySystem_Design, "System.Drawing.Design.UITypeEditor, " + Consts.AssemblySystem_Drawing)]
[UrlPropertyAttribute]
[WebCategoryAttribute ("Behavior")]
public virtual string NavigateUrl {
get {
object ob = ViewState ["NavigateUrl"];
if (ob != null) return (string) ob;
return "";
}
set {
ViewState ["NavigateUrl"] = value;
OnFieldChanged ();
}
}
[DefaultValueAttribute ("")]
[WebCategoryAttribute ("Behavior")]
[TypeConverterAttribute (typeof(TargetConverter))]
public virtual string Target {
get {
object ob = ViewState ["Target"];
if (ob != null) return (string) ob;
return "";
}
set {
ViewState ["Target"] = value;
OnFieldChanged ();
}
}
[LocalizableAttribute (true)]
[DefaultValueAttribute ("")]
[WebCategoryAttribute ("Appearance")]
public virtual string Text {
get {
object ob = ViewState ["Text"];
if (ob != null) return (string) ob;
return "";
}
set {
ViewState ["Text"] = value;
OnFieldChanged ();
}
}
public override void InitializeCell (DataControlFieldCell cell,
DataControlCellType cellType, DataControlRowState rowState, int rowIndex)
{
base.InitializeCell (cell, cellType, rowState, rowIndex);
if (cellType == DataControlCellType.DataCell) {
HyperLink link = new HyperLink ();
bool bind = false;
if (Target.Length > 0)
link.Target = Target;
if (DataTextField.Length > 0)
bind = true;
else
link.Text = Text;
string [] fields = DataNavigateUrlFields;
if (fields.Length > 0)
bind = true;
else
link.NavigateUrl = NavigateUrl;
if (bind && cellType == DataControlCellType.DataCell && (rowState & DataControlRowState.Insert) == 0)
cell.DataBinding += new EventHandler (OnDataBindField);
link.ControlStyle.CopyFrom (ControlStyle);
cell.Controls.Add (link);
}
}
protected virtual string FormatDataNavigateUrlValue (object[] dataUrlValues)
{
if (dataUrlValues == null || dataUrlValues.Length == 0)
return "";
else if (DataNavigateUrlFormatString.Length > 0)
return string.Format (DataNavigateUrlFormatString, dataUrlValues);
else
return dataUrlValues[0].ToString ();
}
protected virtual string FormatDataTextValue (object dataTextValue)
{
if (DataTextFormatString.Length > 0)
return string.Format (DataTextFormatString, dataTextValue);
else if (dataTextValue == null)
return "";
else
return dataTextValue.ToString ();
}
void OnDataBindField (object sender, EventArgs e)
{
DataControlFieldCell cell = (DataControlFieldCell) sender;
HyperLink link = (HyperLink) cell.Controls [0];
object controlContainer = cell.BindingContainer;
object item = DataBinder.GetDataItem (controlContainer);
if (DataTextField.Length > 0) {
if (textProperty == null) SetupProperties (controlContainer);
link.Text = FormatDataTextValue (textProperty.GetValue (item));
}
string[] urlFields = DataNavigateUrlFields;
if (urlFields.Length > 0) {
if (urlProperties == null) SetupProperties (controlContainer);
object[] dataUrlValues = new object [urlFields.Length];
for (int n=0; n<dataUrlValues.Length; n++)
dataUrlValues [n] = urlProperties [n].GetValue (item);
link.NavigateUrl = FormatDataNavigateUrlValue (dataUrlValues);
}
}
void SetupProperties (object controlContainer)
{
object item = DataBinder.GetDataItem (controlContainer);
PropertyDescriptorCollection props = TypeDescriptor.GetProperties (item);
if (DataTextField.Length > 0) {
textProperty = props.Find (DataTextField, true);
if (textProperty == null)
throw new InvalidOperationException ("Property '" + DataTextField + "' not found in object of type " + item.GetType());
}
string[] urlFields = DataNavigateUrlFields;
if (urlFields.Length > 0) {
urlProperties = new PropertyDescriptor [urlFields.Length];
for (int n=0; n<urlFields.Length; n++) {
PropertyDescriptor prop = props.Find (urlFields [n], true);
if (prop == null)
throw new InvalidOperationException ("Property '" + urlFields [n] + "' not found in object of type " + item.GetType());
urlProperties [n] = prop;
}
}
}
protected override DataControlField CreateField ()
{
return new HyperLinkField ();
}
protected override void CopyProperties (DataControlField newField)
{
base.CopyProperties (newField);
HyperLinkField field = (HyperLinkField) newField;
field.DataNavigateUrlFields = DataNavigateUrlFields;
field.DataNavigateUrlFormatString = DataNavigateUrlFormatString;
field.DataTextField = DataTextField;
field.DataTextFormatString = DataTextFormatString;
field.NavigateUrl = NavigateUrl;
field.Target = Target;
field.Text = Text;
}
public override void ValidateSupportsCallback ()
{
}
}
}
#endif
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