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POhow to load json in extjs
 

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    <p>i am loading the values coming from web service but i get following error message. ChatStore.data.items[i] is undefined.</p> <p>Mapping code for extjs is</p> <pre><code>ChatStore = new Ext.data.JsonStore({ storeId: 'ChatStore1', fields: [ {name: "pic_url", mapping: "sender_pic_url"}, {name: "first_name", mapping: "first_name"}, {name: "last_name", mapping: "last_name"}, {name: "message_text", mapping: "message_text"}, {name: "time", mapping: "time"} ] }); </code></pre> <p>code for loading data from webservice</p> <pre><code>Ext.Ajax.request({ url: 'webservice call', params: Ext.encode('{"sender_user_id":"' + suid + '","receiver_user_id":"' + ruid + '"}'), headers: { 'Content-type': 'application/json;charset=utf-8' }, success: function (result, request) { retData = (result.responseText); alert(retData); retData = eval("(" + retData + ")"); if (retData.status == 'success') { //ChatStore.loadData(retData.result.messages); //ChatStore.loadData(retData.result); for (var i = 0; i &lt; retData.result.messages.length; i++) { if (retData.result.messages[i].message_from == "YES") { ChatStore.data.items[i].data.pic_url = retData.result.sender_pic_url; ChatStore.data.items[i].data.first_name = retData.result.sender_name; } else { ChatStore.data.items[i].data.pic_url = retData.result.receiver_pic_url; ChatStore.data.items[i].data.first_name = retData.result.reciever_name; } ChatStore.data.items[i].data.message_text = retData.result.messages[i].message_text; ChatStore.data.items[i].data.time = retData.result.messages[i].time; } // ChatPanel.render('divchat'); messagePanel.hide(); ChatPanel.show(); } else { alert('error loading first radius'); } }, failure: function (result, request) { alert("Error: " + result.statusText); } }); return false; } </code></pre> <p>My webservice result is:-----</p> <pre><code>{ "status": "success", "message": "Messages are listing below", "result": { "sender_name": "Paul", "reciever_name": "Clay", "sender_pic_url": "Images/f1.jpg", "receiver_pic_url": "Images/f2.jpg", "messages": [ { "message_from": "YES", "message_text": "hi, how r u?", "time": "12:00am" }, { "message_from": "NO", "message_text": "hi, where are you?", "time": "1:00am" }, { "message_from": "NO", "message_text": "Dear, you are invited for the meeting", "time": "2:00am" }, { "message_from": "YES", "message_text": "hi, how r u?", "time": "12:00am" }, { "message_from": "NO", "message_text": "hi, where are you?", "time": "1:00am" }, { "message_from": "NO", "message_text": "Dear, you are invited for the meeting", "time": "2:00am" }, { "message_from": "NO", "message_text": "Ya ill be there", "time": "2:00am" }, { "message_from": "NO", "message_text": "at what time party starts", "time": "2:00am" }, { "message_from": "YES", "message_text": "6Oclock in the evening", "time": "2:00am" }, { "message_from": "NO", "message_text": "Who will the chief guest", "time": "2:00am" }, { "message_from": "YES", "message_text": "our city mayor", "time": "2:00am" } ] } } </code></pre> <p>i dont know where the things go wrong.</p>
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