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POGet SimpleDB attribute without looping through all attributes for an item
 

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  1. POGet SimpleDB attribute without looping through all attributes for an item
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    <p>I would like to check an attribute using C# and SimpleDB without having to loop through all the attributes for a specific item.</p> <p>For example, if I have my domain: "MyDomain", and I have three attributes for an item (the item is: george@george.com).</p> <p>The three attributes are:</p> <p>Name<br/> Signup<br/> Contacts<br/></p> <p><br/> So for example this is my data:</p> <p>MyDomain (domain)<br/> &nbsp;&nbsp;george@george.com (item)<br/> &nbsp;&nbsp;&nbsp;&nbsp;George Doe (attribute)<br/> &nbsp;&nbsp;&nbsp;&nbsp;3-1-12 (attribute)<br/> &nbsp;&nbsp;&nbsp;&nbsp;mike@mike.com (attribute)<br/></p> <p><br/> <br/> The problem I am having is my code will loop through all 3 attributes in the george@george.com item.<br/> For example; when I run my code the output is:</p> <p>No Contacts Found<br/> No Contacts Found<br/> Contact: mike@mike.com<br/></p> <p>because my code is looping through all 3 attributes for the george@george.com item.<br/><br/></p> <p>I want to make my C# code only check the "Contacts" attribute and NOT loop through all the attributes for the george@george.com item.<br/><br/></p> <p>Can someone please show me how to do this?</p> <pre><code>AmazonSimpleDB sdb = AWSClientFactory.CreateAmazonSimpleDBClient(); String selectExpression = "Select * From MyDomain Where Email = 'george@george.com'"; SelectRequest selectRequestAction = new SelectRequest().WithSelectExpression(selectExpression); SelectResponse selectResponse = sdb.Select(selectRequestAction); if (selectResponse.IsSetSelectResult()) { SelectResult selectResult = selectResponse.SelectResult; foreach (Item item in selectResult.Item) { foreach (Amazon.SimpleDB.Model.Attribute attribute in item.Attribute) { if (attribute.IsSetName()) { if (attribute.Name == "Contact") { if (attribute.IsSetValue()) { Console.WriteLine("Contact: {0}", attribute.Value); } } else { Console.WriteLine("No Contacts Found"); } } } } } </code></pre> <p><br/>I want it to directly just check the "Contacts" attribute to see if there is a value for it and not loop through all the attributes.</p> <p><br/> <br/></p> <p>Can someone show me a C# code example on how I would accomplish this? Thanks. <br/><br/><br/> EDIT: I still want to loop through all the "Contacts" in the "Contacts" attribute. I just don't want to loop through all the attributes that don't have the name "Contacts". The "Contacts" attribute can hold more than one contact and I still need to get all of those from the attribute.</p> <p>This line of code from Ken below:<br/><br/> string value = item.Attribute.First(a => a.Name == "Contact").Value<br/></p> <p>stops the looping of the different attributes, but it only returns 1 contact from the "Contacts" attribute even though there are more than 1 contact stored in the "Contacts" attribute.</p>
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    1. COYou can try `string value = item.Attribute.First(a => a.Name == "Contact").Value` if you *know* it is there or `FirstOrDefault` and check the result.
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    2. COThat works to stop the looping, but if there are multiple Contacts in the "Contacts" attribute, it only returns the first contact. I still want to loop through all the different contacts in the "Contacts" attribute, I just don't want to loop through all the different attributes with names other than "Contacts".
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