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//
// System.Web.UI.WebControls.ButtonColumn.cs
//
// Authors:
// Gaurav Vaish (gvaish@iitk.ac.in)
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//
// (C) Gaurav Vaish (2002)
// (C) 2003 Andreas Nahr
//
//
// 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.ComponentModel;
using System.Web;
using System.Web.UI;
namespace System.Web.UI.WebControls
{
public class ButtonColumn : DataGridColumn
{
private PropertyDescriptor textFieldDescriptor;
public ButtonColumn(): base()
{
}
public override void Initialize()
{
base.Initialize();
textFieldDescriptor = null;
}
public override void InitializeCell(TableCell cell, int columnIndex, ListItemType itemType)
{
base.InitializeCell(cell, columnIndex, itemType);
if (Enum.IsDefined(typeof(ListItemType), itemType) &&
itemType != ListItemType.Footer &&
itemType != ListItemType.Header)
{
WebControl toDisplay = null;
if(ButtonType == ButtonColumnType.PushButton)
{
Button b = new Button();
b.Text = Text;
b.CommandName = CommandName;
b.CausesValidation = false;
toDisplay = b;
} else
{
LinkButton lb = new DataGridLinkButton();
lb.Text = Text;
lb.CommandName = CommandName;
lb.CausesValidation = false;
toDisplay = lb;
}
if(DataTextField.Length > 0)
{
toDisplay.DataBinding += new EventHandler(OnDataBindButtonColumn);
}
cell.Controls.Add(toDisplay);
}
}
private void OnDataBindButtonColumn(object sender, EventArgs e)
{
Control ctrl = (Control)sender;
object item = ((DataGridItem)ctrl.NamingContainer).DataItem;
if(textFieldDescriptor == null)
{
textFieldDescriptor = TypeDescriptor.GetProperties(item).Find(DataTextField, true);
if(textFieldDescriptor == null && !DesignMode)
throw new HttpException(HttpRuntime.FormatResourceString("Field_Not_Found", DataTextField));
}
string text;
if(textFieldDescriptor != null)
{
text = FormatDataTextValue(textFieldDescriptor.GetValue(item));
} else
{
text = "Sample_DataBound_Text";
}
if(ctrl is LinkButton)
{
((LinkButton)ctrl).Text = text;
}
else
{
((Button)ctrl).Text = text;
}
}
protected virtual string FormatDataTextValue(object dataTextValue)
{
string retVal = null;
if(dataTextValue != null)
{
if(DataTextFormatString.Length > 0)
{
retVal = String.Format(DataTextFormatString, dataTextValue);
}
else
{
retVal = dataTextValue.ToString();
}
}
return retVal;
}
// LAMESPEC The framework uses Description values for metadata here. However they should be WebSysDescriptions
// because all metadata in this namespace has WebSysDescriptions
[DefaultValue (typeof (ButtonColumnType), "LinkButton"), WebCategory ("Misc")]
[Description ("The type of button used in this column.")]
public virtual ButtonColumnType ButtonType
{
get
{
object o = ViewState["ButtonType"];
if(o!=null)
return (ButtonColumnType)o;
return ButtonColumnType.LinkButton;
}
set
{
if(!System.Enum.IsDefined(typeof(ButtonColumnType), value))
throw new ArgumentException();
ViewState["ButtonType"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("The command assigned to this column.")]
public virtual string CommandName
{
get
{
string cn = (string)ViewState["CommandName"];
if(cn!=null)
return cn;
return String.Empty;
}
set
{
ViewState["CommandName"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("The datafield that is bound to the text property.")]
public virtual string DataTextField
{
get
{
string dtf = (string)ViewState["DataTextField"];
if(dtf!=null)
return dtf;
return String.Empty;
}
set
{
ViewState["DataTextField"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("A format that is applied to the bound text property.")]
public virtual string DataTextFormatString
{
get
{
string dtfs = (string)ViewState["DataTextFormatString"];
if(dtfs!=null)
return dtfs;
return String.Empty;
}
set
{
ViewState["DataTextFormatString"] = value;
}
}
[DefaultValue (""), WebCategory ("Misc")]
[Description ("The text used for this button.")]
public virtual string Text
{
get
{
string text = (string)ViewState["Text"];
if(text!=null)
return text;
return String.Empty;
}
set
{
ViewState["Text"] = value;
}
}
}
}
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