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PONeed to find a SPItem without knowing the ID of the item
 

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    <p>I have two lists and one event receiver. The event receiver sets a column of the list to a unique identifier (combo of the content type and the item id). In the other list I use query string and the newform to set a field to the very same unique identifier above. I also gather some more info in that newform I want to work with.</p> <p>How can I query a list without knowing the ID, but I have another unique id to single out from the other items so I can work with it just as SPitem firstitem below so I can find the other fields.</p> <hr> <p>Getting my first item to get the unique title:</p> <pre><code>SPSite currentSite = SPContext.Current.Site; SPWeb web = currentSite.OpenWeb(); string queryString = Request.QueryString["uniqueID"]; SPList firstList = web.Lists["My First List"]; SPItem firstItem = firstList.Items.GetItemById(Convert.ToInt32(queryString)); </code></pre> <p>this is the unique title I want to query second list with:</p> <pre><code>string uniqueTitle = firstItem["Title"].ToString(); </code></pre> <p>getting my second list up, ready for action:</p> <pre><code>SPList secondList = web.Lists["My Second List"]; </code></pre> <hr> <p>Thanks</p> <hr> <p>ANSWER:</p> <pre><code>// open the second list SPList secondList = web.Lists["My Second List"]; // Query the second list for the item SPQuery myQuery = new SPQuery(); myQuery.Query = "&lt;Where&gt;&lt;Eq&gt;&lt;FieldRef Name = \"Title\"/&gt;" + "&lt;Value Type = \"Text\"&gt;" + uniqueTitle + "&lt;/Value&gt;&lt;/Eq&gt;&lt;/Where&gt;"; // Get a collection of the second list items selected by the query and pick the first (0) value as it should only return one! SPListItemCollection secondlistItemCol = secondList.GetItems(myQuery); SPListItem secondItem = secondlistItemCol[0]; </code></pre>
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