Creating a Comprehensive WebDynPro ALV Tutorial: A Step-by-Step Guide for Developers

Introduction

---------

As web applications continue to gain popularity in today's fast-paced digital landscape, developers are increasingly turning towards robust frameworks like SAP Netweaver's Webdynpro. One of the most critical components within this framework is the Advanced List Viewer (ALV), which plays a pivotal role in rendering and managing complex data sets.

However, even with its extensive features and capabilities, mastering AL DynPro can be an arduous task for novice developers, especially when it comes to incorporating and fine-tuning various third-party controls like ALV. To bridge this knowledge gap, this comprehensive tutorial will guide you through the process of creating a fully functional WebDynPro application that seamlessly integrates with SAP's Advanced List Viewer (ALV).

Prerequisites

----------

Before diving into the meat of this article, ensure that your development environment meets the following prerequisites:

1. You have an active SAP Netwe Painter or Visual Studio 2005/2010 installed on your local machine.

2. Your system has .NET Framework 3.5 SP1 and later versions (including VS2010) or Java Runtime Environment (JRE) v6.x and above (for Netweaver 7.x).

Step-by-Step ALV Integration Tutorial

----------------------------------

### Step 1: Create a New WebDynPro Project

To begin with, open either SAP Netwe Painter or Visual Studio 2005/2010 depending on your preferred IDE. Once the respective project creation wizard appears:

* For SAP Netwe Builder:

* Choose 'New -> Web Dynpro ABAP' under the 'Web Dyn'

category and follow through with the subsequent prompts.

* For VS2005/VS2010:

* Select '.NET -> Visual C# | ASP.NET

Web Sites or Web Applications' depending on your project type preferences.

### Step 2: Import ALV Controls

With a new empty web Dynpro application template created, navigate to the 'Project References':

* For SAP Netwe Builder:

* Right-click on your newly generated project and select 'References...' from

the context menu.

* Under 'Browse' tab, browse to your installed ALV control's location (usually under \'SAP BASIS DIR'\D00\ALV).

* For VS2005/VS2010:

a. Right-click on your project within Solution Explorer and choose

Add -> References...

b. Under 'Browse' tab, navigate to the installed ALV control's location (generally found under \'SAP BASIS DIR'\D00\ALV).

### Step 3: Configure WebDynPro Application Settings

To ensure smooth integration between your web Dynpro application and SAP's Advanced List Viewer:

* Open Visual Studio 2005/2010:

* Double-click on 'Web.config' (or 'web.config') located in the root

directory of your web project.

* Locate the ` ` section within

tags and insert or update the following settings:

```xml

maxRequestLength='1024'

executeUrlInStepplerMode='true'

mode='inproc'

timeout='30'>

'Microsoft.Aspnet.Caching.Cache

Session Persister'/>

/ sessionState>

```

* Save changes to web.config.

### Step 4: Create a New ALV Table Controller

To display data within your application using SAP's Advanced List Viewer, you'll need to create an ALVTTableController:

1. Double-click on the 'ALVTMainPage' view located under 'View -> Model View

Controllers' in Visual Studio 2005/2010 or double-double click on it in Netwe Builder.

2 Add necessary Imports (for .NET) or use statements at top of your ALVTableController class:

```csharp

using System;

// Additional imports as required for specific controls or functionality used in this example

public partial class ZCL_ALVTMainPage : CL_SALV_TABLEFUNCTIONS

```

3 Implement necessary table control methods like `GetItens` and `F_Maintain`:

```csharp

protected override void OnLoad(EventArgs e)

{

base.OnLoad(e);

// Initialize ALV instance and set up its layout, columns etc.

alvTable = new SALVT_ALTVIEWER(this.control.id,

'ALV_TABLE', 500, 300);

// Bind data to ALV table

this.alvTable.set_dataBindContext(

new SAP.SAPUI5.RFCL_ASNWCTXTBINDING());

}

```

### Step 5: Implement Event Handling for Data Binding

Finally, you need to implement event handling methods within your ALVTTableController class:

1 Add necessary import statements at top of your ALVTableController:

```csharp

using System;

// Additional imports as required for specific controls or functionality used in this example

public partial class ZCL_ALVTMainPage : CL_SALV_TABLEFUNCTIONS, IEventHanlper

```

2 Implement necessary event handling methods like `OnDDoubleClicked`:

```csharp

protected override void OnDDoubleClick(TableCell arg0)

{

// Handle double click events here.

}

```

3 Add this ALVTTableController instance to your page controller's constructor:

```csharp

public partial class ZCL_ALVMainPage : CL_SALv_page_controller

{

private IEventHanlper _alvt_table_event_handler;

public void OnInit(IStackedView p_sview)

{

// Initialize other components here.

if (!this.IsInitialized())

this._alvt_table_event_handler = new ALVTTableEventHandler();

}

```

---------

With these steps completed, you now possess the necessary knowledge and skills to successfully integrate SAP's Advanced List Viewer (ALV) into your web Dynpro application using .NET or Java. Remember that each scenario may require additional configuration based on specific requirements such as data binding, sorting, filtering etc., so don't hesitate to consult official documentation for further guidance.

By following this comprehensive tutorial step-by-step and practicing what you've learned along the way, you'll be well-equipped to tackle even the most complex web Dynpro ALV development tasks with ease. Happy coding!

Web dynpro alv tutorial