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PORetrieve data from database and display it dynamically in the rows of the table using textboxes
 

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  1. PORetrieve data from database and display it dynamically in the rows of the table using textboxes
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    <p>I'm currently working on an Inventory Management project. I m working with JSP and MySQL on Netbeans Platform. In my project on querying I need to retrieve values from the database and display it in a table. The rows to be displayed should be dynamic in my page. They should be displayed in any number. Suppose When I want to retrieve values based on a particular choice I select, I should be able to display all the data based on the choice and display it in the rows of the table. I am not able to display it in multiple rows of my table because I m using text boxes to display the values. Here is the code snippet:</p> <pre><code>&lt;table&gt; &lt;tr&gt; &lt;td&gt; &lt;select name="choice_type"&gt; &lt;option&gt;select&lt;/option&gt; &lt;option value="part_type"&gt;part_type&lt;/option&gt; &lt;option value="category"&gt;category&lt;/option&gt; &lt;option value="names"&gt;names&lt;/option&gt; &lt;/select&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;th&gt;VAL&lt;/th&gt; &lt;th&gt;VAL DESC&lt;/th&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; &lt;input type="text" name="val" id="val" size="15" /&gt;&lt;/td&gt; &lt;td&gt; &lt;input type="text" name="val_desc" id="val_desc" size="15" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;input type="submit" name="Query" value="Query" onClick="getData();"/&gt; </code></pre> <p>The getData() function is as follows:</p> <pre><code>function getData(){ xmlHttp=GetXmlHttpObject() var id=document.getElementById("choice_type").value; var url="choice_retrieval.jsp";//The code for this file is defined below url=url+"?choice_type="+id; xmlHttp.onreadystatechange=stateChanged xmlHttp.open("GET",url,true) xmlHttp.send(null); } function stateChanged(){ if(xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ var showdata = xmlHttp.responseText; var strar = showdata.split(":"); if(strar.length&gt;1){ var strname = strar[1]; document.getElementById("val").value= strar[1]; document.getElementById("val_desc").value= strar[2]; } } </code></pre> <p>The Code snippet for choice_retrieval.jsp is as follows:</p> <pre><code>&lt;% String ch = request.getParameter("choice_type").toString(); System.out.println(ch); String data =""; try{ Class.forName("com.mysql.jdbc.Driver"); Connection con = DriverManager.getConnection("jdbc:mysql://", "", ""); Statement st=con.createStatement(); ResultSet rs=st.executeQuery("select * from master_panel where choice_type='"+ch+"'"); while(rs.next()) { data = ":" + rs.getString("val") + ": " + rs.getString("val_desc"); } out.println(data); System.out.println(data); } catch(Exception e) { System.out.println(e); } %&gt; </code></pre> <p>Database table used here is master_panel(choice_type varchar,val varchar,val_desc varchar). I have not put any constraints as of now. Based on the choice_type value I need to retrieve the corresponding data(val and val_desc) from the database and display it in dynamic rows.</p>
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