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ASP.NET 4 Hosting - ASPHostPortal :: ASP.NET Dynamic Data Websites - Creating Custom Dynamic Data Fields

clock January 4, 2011 05:38 by author Jervis

ASP.NET Dynamic Data provides fields that use the database schema to automatically determine the correct control to render to display data. The Fields are nothing more than ASP.NET UserControls that sit in the App_Shared -> DynamicDataFields Folder in your website:



All the Dynamic Data Fields shown above are included by default, except for the custom CalendarDateTime and CalendarDateTime_Edit Fields that I added for this tutorial.

Dynamic Data Fields work like this. When a boolean field, for example, needs to be rendered, by default it is the Boolean.ascx or Boolean_Edit.ascx Field that is used to render the value. If a DateTime field needs to be rendered, by default it is the DateTime.ascx or DateTime_Edit.ascx Field that renders its values. And so on and so forth.

If you want to globally change the way a type is rendered in the application, one only has to make the change in the Dynamic Data Field UserControl associated with the type.

Overriding the Dynamic Data Field to Display a Value

Sometimes you don't want to globally change a Dynamic Data Field, however, but use a custom field to display a specific value.

For example, the Employees Table in the Northwind Database has a HireDate Field. By default, the DateTime_Edit Field will display the value for modification. This is nothing but a TextBox as shown in this partial view:



Let's pretend that our client wanted HireDate to have a Calendar for date input, but BirthDate and all other dates in the application to be the default textbox.

To do so, we decide to create a custom Dynamic Data Field for HireDate, called CalendarDateTime and CalendarDateTime_Edit as shown in the Solution Explorer above. To start us off, we just copy and paste DateTime and DateTime_Edit, and rename them to CalendarDateTime and CalendarDateTime_Edit.

More importantly, however, we need to tell the Dynamic Data Framework that we want to use this custom Dynamic Data Field for the HireDate. Luckily for us, there is a special attribute for just these times, called RenderHint. We create a partial class of Employee, separate from the one defined in the LINQ To SQL Model, and add the RenderHint Attribute to it that specifies the HireDate Property needs to be rendered with the CalendarDateTime Field:

[RenderHint("HireDate","CalendarDateTime")]
public partial class Employee
{
}

Creating the Custom CalendarDateTime Dynamic Data Field

For simplicity, we are going to use the CalendarExtender in the AJAX Control Toolkit to display a calendar for date input as soon as the HireDate receives focus. All I did was add the CalendarExtender into CalendarDateTime_Edit and accepted most of the defaults:

<ajaxtoolkit:calendarextender
    ID="Calendar"
    TargetControlID="TextBox1"
    Format="MMMM d, yyyy"
    CssClass="yui"
    runat="server" />

TextBox1 is the textbox that will display the HireDate in this case. As soon as it gets focus, the calendar displays:



Modifying Default Dynamic Data Fields

It is probably obvious, but if you find that you will want a calendar for date input by default for all date fields, you don't have to use the RenderHint Attribute or create a custom CalendarDateTime Dynamic Data Field. Just modify the default template for editing a date, DateTime_Edit, and all date fields will have a calendar for date input.

Reasons why you must trust ASPHostPortal.com

Every provider will tell you how they treat their support, uptime, expertise, guarantees, etc., are. Take a close look. What they’re really offering you is nothing close to what ASPHostPortal does. You will be treated with respect and provided the courtesy and service you would expect from a world-class web hosting business.

You’ll have highly trained, skilled professional technical support people ready, willing, and wanting to help you 24 hours a day. Your web hosting account servers are monitored from three monitoring points, with two alert points, every minute, 24 hours a day, 7 days a week, 365 days a year. The followings are the list of other added- benefits you can find when hosting with us:

- DELL Hardware
Dell hardware is engineered to keep critical enterprise applications running around the clock with clustered solutions fully tested and certified by Dell and other leading operating system and application providers.
- Recovery Systems
Recovery becomes easy and seamless with our fully managed backup services. We monitor your server to ensure your data is properly backed up and recoverable so when the time comes, you can easily repair or recover your data.
- Control Panel
We provide one of the most comprehensive customer control panels available. Providing maximum control and ease of use, our Control Panel serves as the central management point for your ASPHostPortal account. You’ll use a flexible, powerful hosting control panel that will give you direct control over your web hosting account. Our control panel and systems configuration is fully automated and this means your settings are configured automatically and instantly.
- Excellent Expertise in Technology
The reason we can provide you with a great amount of power, flexibility, and simplicity at such a discounted price is due to incredible efficiencies within our business. We have not just been providing hosting for many clients for years, we have also been researching, developing, and innovating every aspect of our operations, systems, procedures, strategy, management, and teams. Our operations are based on a continual improvement program where we review thousands of systems, operational and management metrics in real-time, to fine-tune every aspect of our operation and activities. We continually train and retrain all people in our teams. We provide all people in our teams with the time, space, and inspiration to research, understand, and explore the Internet in search of greater knowledge. We do this while providing you with the best hosting services for the lowest possible price.
- Data Center
ASPHostPortal modular Tier-3 data center was specifically designed to be a world-class web hosting facility totally dedicated to uncompromised performance and security
- Monitoring Services
From the moment your server is connected to our network it is monitored for connectivity, disk, memory and CPU utilization – as well as hardware failures. Our engineers are alerted to potential issues before they become critical.
- Network
ASPHostPortal has architected its network like no other hosting company. Every facet of our network infrastructure scales to gigabit speeds with no single point of failure.
- Security
Network security and the security of your server are ASPHostPortal’s top priorities. Our security team is constantly monitoring the entire network for unusual or suspicious behavior so that when it is detected we can address the issue before our network or your server is affected.
- Support Services
Engineers staff our data center 24 hours a day, 7 days a week, 365 days a year to manage the network infrastructure and oversee top-of-the-line servers that host our clients’ critical sites and services.



ASP.NET 4 Hosting - ASPHostPortal :: Error - A potentially dangerous Request.Form value was detected from the client

clock December 17, 2010 07:40 by author Jervis

Problem

A potentially dangerous Request.Form value was detected from the client

Description

Microsoft .NET Framework 1.1 causes this due to enhanced security features (request validation).  Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted.  This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack.  You can disable request validation by setting validateRequest=false in the Page directive or in the configuration section of Web.config.  However, it is strongly recommended that your application explicitly check all inputs in this case.

Solution

1. Locate the ASP.NET settings in:

<Application Folder>\Web.config

2. Set the value of validateRequest attribute of pages element to false.

<pages validateRequest="false" />


Reasons why you must trust ASPHostPortal.com

Every provider will tell you how they treat their support, uptime, expertise, guarantees, etc., are. Take a close look. What they’re really offering you is nothing close to what ASPHostPortal does. You will be treated with respect and provided the courtesy and service you would expect from a world-class web hosting business.

You’ll have highly trained, skilled professional technical support people ready, willing, and wanting to help you 24 hours a day. Your web hosting account servers are monitored from three monitoring points, with two alert points, every minute, 24 hours a day, 7 days a week, 365 days a year. The followings are the list of other added- benefits you can find when hosting with us:

- DELL Hardware
Dell hardware is engineered to keep critical enterprise applications running around the clock with clustered solutions fully tested and certified by Dell and other leading operating system and application providers.
- Recovery Systems
Recovery becomes easy and seamless with our fully managed backup services. We monitor your server to ensure your data is properly backed up and recoverable so when the time comes, you can easily repair or recover your data.
- Control Panel
We provide one of the most comprehensive customer control panels available. Providing maximum control and ease of use, our Control Panel serves as the central management point for your ASPHostPortal account. You’ll use a flexible, powerful hosting control panel that will give you direct control over your web hosting account. Our control panel and systems configuration is fully automated and this means your settings are configured automatically and instantly.
- Excellent Expertise in Technology
The reason we can provide you with a great amount of power, flexibility, and simplicity at such a discounted price is due to incredible efficiencies within our business. We have not just been providing hosting for many clients for years, we have also been researching, developing, and innovating every aspect of our operations, systems, procedures, strategy, management, and teams. Our operations are based on a continual improvement program where we review thousands of systems, operational and management metrics in real-time, to fine-tune every aspect of our operation and activities. We continually train and retrain all people in our teams. We provide all people in our teams with the time, space, and inspiration to research, understand, and explore the Internet in search of greater knowledge. We do this while providing you with the best hosting services for the lowest possible price.
- Data Center
ASPHostPortal modular Tier-3 data center was specifically designed to be a world-class web hosting facility totally dedicated to uncompromised performance and security
- Monitoring Services
From the moment your server is connected to our network it is monitored for connectivity, disk, memory and CPU utilization – as well as hardware failures. Our engineers are alerted to potential issues before they become critical.
- Network
ASPHostPortal has architected its network like no other hosting company. Every facet of our network infrastructure scales to gigabit speeds with no single point of failure.
- Security
Network security and the security of your server are ASPHostPortal’s top priorities. Our security team is constantly monitoring the entire network for unusual or suspicious behavior so that when it is detected we can address the issue before our network or your server is affected.
- Support Services
Engineers staff our data center 24 hours a day, 7 days a week, 365 days a year to manage the network infrastructure and oversee top-of-the-line servers that host our clients’ critical sites and services.



ASP.NET 4.0 Hosting - ASPHostPortal :: Showing, Styling and DataBind items in an ASP .NET 4.0 CheckBoxList using CSS and EF4.0

clock November 24, 2010 07:35 by author Jervis

I wanted to show records in the ProductCategory table of the SQL Server AdventureWorks database in a ASP .NET 4.0 by using a CheckBoxList, without writing any code.



CheckedListBox.aspx

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="CheckedListBox.aspx.cs" Inherits="Rvl.Demo.AspNet4.EF.WebApplication.Pages.CheckedListBox" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
    <link href="../Styles/CheckedListBox.css" rel="stylesheet" type="text/css" />
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <h2>
        CheckedListBox page
    </h2>
    <asp:CheckBoxList
        ID="PcCheckBoxList"
        runat="server"
        DataSourceID="PcDataSource"
        DataTextField="Name"
        DataValueField="ProductCategoryID"        ondatabound="PcCheckBoxList_DataBound">
    </asp:CheckBoxList>
    <asp:EntityDataSource
        ID="PcDataSource"
        runat="server"
        EnableDelete="true"
        EnableInsert="true"
        EnableUpdate="true"
        ConnectionString="name=AdventureWorksEntities"
        DefaultContainerName="AdventureWorksEntities"
        EntitySetName="ProductCategory"
        >
    </asp:EntityDataSource>
</asp:Content>

CheckedListBox.css

div.main h2
{
    margin-bottom: 10px;
}
div.main label
{
    padding-left: 30px;
}

You can style the labels of the checkboxes with  CSS, because they are rendered as <input type=”checkbox” … /><label for=”…”></label> in html, like:

<table id="MainContent_PcCheckBoxList">
<tr>
<td><input id="MainContent_PcCheckBoxList_0" type="checkbox" name="ctl00$MainContent$PcCheckBoxList$0" value="1" /><label for="MainContent_PcCheckBoxList_0">Bikes</label></td>
</tr><tr>
<td><input id="MainContent_PcCheckBoxList_1" type="checkbox" name="ctl00$MainContent$PcCheckBoxList$1" value="2" /><label for="MainContent_PcCheckBoxList_1">Components</label></td>
</tr><tr>
<td><input id="MainContent_PcCheckBoxList_2" type="checkbox" name="ctl00$MainContent$PcCheckBoxList$2" value="3" /><label for="MainContent_PcCheckBoxList_2">Clothing</label></td>
</tr><tr>
<td><input id="MainContent_PcCheckBoxList_3" type="checkbox" name="ctl00$MainContent$PcCheckBoxList$3" value="4" /><label for="MainContent_PcCheckBoxList_3">Accessories</label></td>
</tr>
</table>

DataBind to Selected property

You can’t declaratively bind to the “Selected” property of you CheckBoxList items.

So if you want to check some checkboxes in the CheckBoxList, you should do that in the DataBound event of the CheckBoxList control. This event will fire after the control is databound, so it is filled with items.

protected void PcCheckBoxList_DataBound(object sender, EventArgs e)
        {
            // Check the first and last item
            this.PcCheckBoxList.Items[0].Selected = true;
            this.PcCheckBoxList.Items[3].Selected = true;

            // To check them all, use:
            //foreach (ListItem li in this.PcCheckBoxList.Items)
            //{
            //    li.Selected = true;
            //}
        }

Solution Explorer (Project Structure)




Steps

1. Create a new ASP .NET 4.0 WebApplication in VS2010
2. Add a ADO .NET Entity Data Model (connected to the SQL Server 2008 R2 AdventureWorks database)
3. Add the ProductCategory table to you’re ADO .NET Entity Data Model
4. Add a Web Form (CheckedListBox.aspx)
5. Add a Style Sheet (CheckedListBox.css)
6. Set CheckedListBox.aspx as startup page
7. Run the project


Reasons why you must trust ASPHostPortal.com

Every provider will tell you how they treat their support, uptime, expertise, guarantees, etc., are. Take a close look. What they’re really offering you is nothing close to what ASPHostPortal does. You will be treated with respect and provided the courtesy and service you would expect from a world-class web hosting business.

You’ll have highly trained, skilled professional technical support people ready, willing, and wanting to help you 24 hours a day. Your web hosting account servers are monitored from three monitoring points, with two alert points, every minute, 24 hours a day, 7 days a week, 365 days a year. The followings are the list of other added- benefits you can find when hosting with us:

- DELL Hardware
Dell hardware is engineered to keep critical enterprise applications running around the clock with clustered solutions fully tested and certified by Dell and other leading operating system and application providers.
- Recovery Systems
Recovery becomes easy and seamless with our fully managed backup services. We monitor your server to ensure your data is properly backed up and recoverable so when the time comes, you can easily repair or recover your data.
- Control Panel
We provide one of the most comprehensive customer control panels available. Providing maximum control and ease of use, our Control Panel serves as the central management point for your ASPHostPortal account. You’ll use a flexible, powerful hosting control panel that will give you direct control over your web hosting account. Our control panel and systems configuration is fully automated and this means your settings are configured automatically and instantly.
- Excellent Expertise in Technology
The reason we can provide you with a great amount of power, flexibility, and simplicity at such a discounted price is due to incredible efficiencies within our business. We have not just been providing hosting for many clients for years, we have also been researching, developing, and innovating every aspect of our operations, systems, procedures, strategy, management, and teams. Our operations are based on a continual improvement program where we review thousands of systems, operational and management metrics in real-time, to fine-tune every aspect of our operation and activities. We continually train and retrain all people in our teams. We provide all people in our teams with the time, space, and inspiration to research, understand, and explore the Internet in search of greater knowledge. We do this while providing you with the best hosting services for the lowest possible price.
- Data Center
ASPHostPortal modular Tier-3 data center was specifically designed to be a world-class web hosting facility totally dedicated to uncompromised performance and security
- Monitoring Services
From the moment your server is connected to our network it is monitored for connectivity, disk, memory and CPU utilization – as well as hardware failures. Our engineers are alerted to potential issues before they become critical.
- Network
ASPHostPortal has architected its network like no other hosting company. Every facet of our network infrastructure scales to gigabit speeds with no single point of failure.
- Security
Network security and the security of your server are ASPHostPortal’s top priorities. Our security team is constantly monitoring the entire network for unusual or suspicious behavior so that when it is detected we can address the issue before our network or your server is affected.
- Support Services
Engineers staff our data center 24 hours a day, 7 days a week, 365 days a year to manage the network infrastructure and oversee top-of-the-line servers that host our clients’ critical sites and services.



About ASPHostPortal.com

We’re a company that works differently to most. Value is what we output and help our customers achieve, not how much money we put in the bank. It’s not because we are altruistic. It’s based on an even simpler principle. "Do good things, and good things will come to you".

Success for us is something that is continually experienced, not something that is reached. For us it is all about the experience – more than the journey. Life is a continual experience. We see the Internet as being an incredible amplifier to the experience of life for all of us. It can help humanity come together to explode in knowledge exploration and discussion. It is continual enlightenment of new ideas, experiences, and passions


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Corporate Address (Location)

ASPHostPortal
170 W 56th Street, Suite 121
New York, NY 10019
United States

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