61 lines
1.8 KiB
HTML
61 lines
1.8 KiB
HTML
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<html>
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<head>
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<link rel="stylesheet" type="text/css" href="..\styles.css">
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</head>
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<body>
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<img src="..\..\da.png" alt="" align="right">
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<!-------------------------------------------------------------------------->
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<p class="h1">
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<span>Fetch</span>
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</p>
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<h2>Purpose</h2>
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<p>
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This demo shows how to fetch paged orders and also master/detail via single
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server call. See the
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<a href="http://www.remobjects.com?da04">DA04</a>
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article for a discussion on Dynamic Method Binding using this
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sample as its example.</p>
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<h2>Getting Started</h2>
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<p>
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When you compile and run both projects you will see the client present you
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with two tabbed pages:
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</p>
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<ul>
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<li>
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<b>Paged Orders</b>: when the master dataset ("Orders") is opened,
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the first 40 records are fetched from the server (assuming that you haven't
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modified the <b>Max Records Per Fetch</b> setting). Try clicking on the vertical
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scrollbar.
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Initially, you will be displaying the other records fetched when the dataset
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was opened. Once you have reached record 40, another batch of records are then
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fetched from the server and you can see when this happens because the scrollbar
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thumb reduces size.<br />OrderDetail records are only fetched as required.
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</li>
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<li>
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<b>Fetch All</b>: retrieves all orders within the range specified. All
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associated OrderDetail records are retrieved also.
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</li>
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</ul>
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<h2>Examine the Code</h2>
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<p>
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The following methods are worth examining:
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</p>
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<ul>
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<li>
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<b>GetOrdersAndDetails</b> in <b>FetchService_Impl</b>: called by the<b> Fetch
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All</b> page and it shows how to retrieve master and detail records in a single
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server call.
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</li>
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<li>
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<b>tbl_PagedOrdersAfterScroll</b> in <b>FetchClientMain</b>: holds the paging logic.
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</li>
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</ul>
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</body>
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</html>
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