using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Permissions;
using System.ComponentModel;
using System.Text;
namespace Bruce.Web.Controls
{
[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[ToolboxData("<{0}:RequestProcesser ID=\"RequestProcesser\" runat=\"server\"></{0}:RequestProcesser>")]
public class RequestProcesser : CompositeControl
{
/// <summary>
/// JavaScript物件名稱
/// </summary>
private string ObjectName = "__RequestProcesser";
[Browsable(false)]
[PersistenceMode(PersistenceMode.InnerProperty)]
public ProcesserAction Action { get; set; }
[Browsable(false)]
[PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate ContentTemplate { get; set; }
protected override void OnPreRender(EventArgs e)
{
ScriptManager sm = ScriptManager.GetCurrent(this.Page);
if (sm == null)
{
#region OnBeginRequest
string script = string.IsNullOrEmpty(this.Action.OnBeginRequest.Text.Trim())
? "document.getElementById('" + this.ClientID + "').style.display = 'block';"
: string.Format(@"
if((function(){{
{0}
}})() == false){{
return false;
}}else{{
document.getElementById('{1}').style.display = 'block';
return true;
}}", this.Action.OnBeginRequest.Text.Trim(), this.ClientID);
this.Page.ClientScript.RegisterOnSubmitStatement(this.Page.GetType(), "OnBeginRequest", script);
#endregion
}
else
{
StringBuilder script = new StringBuilder();
script.AppendFormat("var {0} = {{}};{1}", this.ObjectName, Environment.NewLine);
#region OnBeginRequest
script.AppendFormat(@"{0}.OnBeginRequest = function() {{
if((function(){{
{1}
}})() == false){{
return false;
}}else{{
document.getElementById('{2}').style.display = 'block';
return true;
}}
}};
//Sys.WebForms.PageRequestManager.getInstance().add_beginRequest({0}.OnBeginRequest);
",
this.ObjectName,
this.Action == null || this.Action.OnBeginRequest == null ? string.Empty : this.Action.OnBeginRequest.Text.Trim(),
this.ClientID);
this.Page.ClientScript.RegisterOnSubmitStatement(this.Page.GetType(), "OnBeginRequest", "return " + ObjectName + ".OnBeginRequest();");
#endregion
#region OnEndRequest
script.AppendFormat(@"{0}.OnEndRequest = function() {{
document.getElementById('{1}').style.display = 'none';
(function(){{
{2}
}})();
}};
Sys.WebForms.PageRequestManager.getInstance().add_endRequest({0}.OnEndRequest);
",
this.ObjectName,
this.ClientID,
this.Action == null || this.Action.OnEndRequest == null ? string.Empty : this.Action.OnEndRequest.Text.Trim());
#endregion
this.Page.ClientScript.RegisterStartupScript(this.Page.GetType(), "Processing", script.ToString(), true);
}
this.Style["display"] = "none";
base.OnPreRender(e);
}
protected override void CreateChildControls()
{
Controls.Clear();
if (ContentTemplate != null)
{
ContentTemplate.InstantiateIn(this);
}
}
public override void DataBind()
{
CreateChildControls();
ChildControlsCreated = true;
base.DataBind();
}
}
[DesignTimeVisible(false)]
public class ProcesserAction
{
[PersistenceMode(PersistenceMode.InnerProperty),]
public Literal OnBeginRequest { get; set; }
[PersistenceMode(PersistenceMode.InnerProperty)]
public Literal OnEndRequest { get; set; }
}
}