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Download Shapefiles - Similar to the Extract Service in ArcIMS

ManojPavuluri

Hi All

Is there a way to create a tool to download data from a service into a shapefile from a Silverlight API?

If there is what would be the approach? If there is not, are there any alternatives?

Thanks

Manoj

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SomeGISGuy

Create a custom GP tool that does this for you and publish it to your server.

ChristineZeller

Manoj and Morten

Create a custom GP tool that does this for you and publish it to your server.

I was looking to do the same thing and I was thinking a GP tool.....something similar to the zip and clip. Take out the clip and add a drop down pick list or something to allow the user to chose which layer to download. I'm not quite sure how to create the user selection/drop down pick list. Is that possible with a GP service?

If someone has something like this would you share?

Thanks
Christine

JMcNeil

I'm doing the same thing right now.....and I've been thinking about this for a week or two. I also don't need to clip....just shape and zip. You could do this with a GP and I almost did but my data isn't changing that often so if there is no need to clip and no need to have the server zip then why tax your machine. PRE-ZIP you geodatabases or shapefiles. Then simple create a button that opens a grid or stack panel or something and have you xaml code give the users the options to click and download.

Something like this ...... Grid Stlye

<Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="*"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>
            <HyperlinkButton Grid.Row="0" Grid.Column="1" Content="File 1" NavigateUri="http://MachineName/Downloads/File1.zip" />
            <HyperlinkButton Grid.Row="1" Grid.Column="1"  Content="File 2" NavigateUri="http://MachineName/Downloads/File2.zip" />

            <TextBlock Text="Download" Grid.Row="0" Grid.Column="0" />
            <TextBlock Text="Download" Grid.Row="1" Grid.Column="0" />

             
        </Grid>

Or keep it really simple and use a stack panel


  <StackPanel Orientation="Horizontal">





            <TextBlock x:Name="NameZip1" Text=" Download a copy of file #1: "/>
            <HyperlinkButton TargetName="_blank" Content="Click here" NavigateUri="http://MachineName/Downloads/File2.zip"></HyperlinkButton>

        </StackPanel>

Or kick it old school and create a button that luanches a new html page window and create a html page for downloading your layers.

[HTML]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
<h3>Sample Download Page</h3>
<p>To download a copy of File #1, <a href="File-1.zip">click here</a>.</p>
<p>To download a copy of File #2, <a href="File-2.zip">click here</a>.</p>

<p>To download a copy of File #3, <a href="File-3.zip">click here</a>.</p>
</body>
</html>

[/HTML]

J

ManojPavuluri

Thanks for the responses.

The data is most likely to change often on the server. So I guess I have to use the GP service approach to do this.

Is there any documentation on customizing the tool and creating a service and using it in the application?

Thanks

Manoj

JMcNeil

Manjo,

Go to the machine where you installed ArcGIS Server and go to
Program Files\ArcGIS\DeveloperKit\SamplesNET\Server\Web_Applications

There are a bunch of samples. I think you want the one ArcGIS ClipShip Geoprocessing select C# or VB. You will have to change the Tool to work with your data and I don't think you will want to do the clip so just drop that a part. I've attached a copy I found I my machine just incase you can't find it or just do a esri search they demo and have information/direction out there.

I feel like I should warn you again. If you clip it will take a while to run through several layers, not clipping will speed it up but you are still requiring the server to zip and prepare the files.

I have taken both paths and zipping before hand and using the code above is much faster. Some of our data changes regularly but we have trained the staff (techs) to zip and pump to the server, quick replace with the same name. We use a arctool/script for this so it is really no sweet off the data editor back.

ClipShip.zip

ManojPavuluri

Thanks for the pointers. I need to zip all the layers in the service used in the application.

The service used in the application varies based on different users and different regions. The layers have to be converted to shapefiles and zipped on the fly. But they are fixed for a service.

My question is how do I specify the layers to be zipped from the SL application to the GP service. I can get the layer names and IDs of all the layers in the service. But how do I pass that to the GP service.

All the examples use a fixed layer on the server.

Thanks

Manoj

JMcNeil

Thanks for the pointers. I need to zip all the layers in the service used in the application.

The service used in the application varies based on different users and different regions. The layers have to be converted to shapefiles and zipped on the fly. But they are fixed for a service.

My question is how do I specify the layers to be zipped from the SL application to the GP service. I can get the layer names and IDs of all the layers in the service. But how do I pass that to the GP service.

All the examples use a fixed layer on the server.

Thanks

Manoj

Manjo,

I'm not to sure what you are stuck on? You build the GP model tool in ArcMAP and publish the mxd into a map service and the model into a GP service. Build the model in the MXD then turn into Service, build the Model in the MXD and turn that into a GP service. All your layers in your MXD will be published in the service and all of layers will be hard coded in your GP model tool. It sounds like you have serveral MXDs/published service so each one will have to have a GP model tool /GP Service associated with it.

If I understand you correctly...."The service used in the application varies based on different users and different regions. The layers have to be converted to shapefiles and zipped on the fly. But they are fixed for a service." Then this will work perfectly.

Check out this documentation to build the GP model. I think this one converts to a Geodatabase but just sub that tool with the shape tool(from toolbox) if you want to shape out. Everything to build the model is built using toolbox tools and python scripts in the MXD that you will publish into a GP service.

Check this out this will walk you through everything. Maybe you should get the example (portland) up and running and then sub in your data.

http://webhelp.esri.com/arcgisserver/9.3/java/index.htm#geoprocessing/gp_ser-1598051580.htm

Once you have the MXD and GP tool build and the map service and GP service published. Go here to learn how to consume a GP service in SL.

http://help.arcgis.com/en/webapi/silverlight/help/index.html?Expression_Getting_Started.htm

Then click on the Task book/folder
Then click on Geoprocessing.

The key is getting your GP model to work in ArcMAP if it doesn't work in ArcMAP it will never work in your web application. Get your model working in ARCMAP first and then worry about consuming it and getting it to work in your SL web app.

ManojPavuluri

I was stuck on passing the layers to the GP service from the application. I guess they have to be set in the model itself. Thanks for clarifying that.

I was trying to create one task and one GP service to handle the copy shape and zip functionality for all the services. Based on what you suggested I have to create one GP service for each service (each msd).

I am going to do that. It is easier this way.

Thanks for all the help.

Manoj

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