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vb.net database query and checkbox , proper way to do?


vb.net database query and checkbox , proper way to do?

By : Oliver Osted Nielsen
Date : November 19 2020, 01:01 AM
may help you . I don't think you need all that code. Just test your checkbox one by one and build incrementally the list of columns to add to the SELECT query....
code :
Dim selectColumns As String
Try

    If chkboxId.Checked = True Then 
        selectColumns = "userid,"
    End If

    If chkboxName.Checked = True Then
        selectColumns &= "username,"
    End If

    ' Other columns???? follow the same pattern

    ' If we have something in selectColumns then we could execute the query
    ' but before we trim away the last comma
    If selectColumns.Length > 0 Then 
       selectColumns = selectColumn.TrimEnd(",")

       sqlCon.Open()
       SQL = "SELECT " & selectColumns & " FROM user_info"
       .....
    Else
       ' no data in selectColumns? Message for you user
       MsgBox("Plesase do check any box to filter ")
       Exit Sub
    End If    
Catch ex As Exception
    MsgBox(ex.Message)
    sqlCon.Close()
End Try


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Should i just query the database or use a proper search engine solution?

Should i just query the database or use a proper search engine solution?


By : Nadeem Butt
Date : March 29 2020, 07:55 AM
wish help you to fix your issue They solve different problems. Applications designed for search have a different core feature set than traditional databases (both SQL and NoSQL variants), since the requirements are different and their usage differ.
There are some overlaps between DB capabilities relating to search these days, but if we use standard database interactions as a start, writing "find articles with these three words present" is a task that you'll have to do manual processing to solve. Add all the other things you usually want to make search perform well and provide relevant results for your users, and you have a very different problem from what regular databases tries to solve.
What is the proper way to run a long query against an active database?

What is the proper way to run a long query against an active database?


By : user2518836
Date : March 29 2020, 07:55 AM
I wish this help you The default behavior of SELECT queries in the READ_COMMITTED transaction isolation level is to acquire shared locks during query execution to provide the requested data consistency (read committed data only). These locks are typically row-level and released quickly during query execution immediately after each row is read. There are also less granular intent locks at the page and table level prevent concurrent updates to data as it is being read. Depending on the particulars of the execution plan, there may even be shared locks held at the table level for the duration of the query, which will prevent updates to the table during query execution and result in readers blocking writers.
Setting the READ_COMMITTED_SNAPSHOT database option causes SQL Server to use row versioning instead of locking to provide the same read consistency. A row version store is maintained in tempdb so that when a row requested by the query has changed since the query began, the most recent committed row version is returned instead. This row-versioning behavior avoids locking and effectively provides a statement-level snapshot of the database at the time the query began. Readers do not block writers and writers do not block readers. Do not confuse the READ_COMMITTED_SNAPSHOT database option with the SNAPSHOT isolation level (a common mistake).
Twitter Bootstrap: proper way of aligning checkbox with checkbox label

Twitter Bootstrap: proper way of aligning checkbox with checkbox label


By : user2692340
Date : March 29 2020, 07:55 AM
it should still fix some issue For the class for label should be control-label, checkbox is not valid
code :
<div>
  <label class="control-label">
    <input type="checkbox">
    Remember me
  </label>
</div>
<button type="submit" class="btn">Submit</button>
What is the proper way to query the couchdb's _users database from node?

What is the proper way to query the couchdb's _users database from node?


By : Debashish
Date : March 29 2020, 07:55 AM
like below fixes the issue I am using the cradle package on node to query couchdb. My node instance has admin privileges. , You can actually use PouchDB on top of the _users database:
code :
var db = new PouchDB('http://localhost:5984/_users');
db.allDocs({include_docs: true}).then(/* ... */) // <-- fetches all users
Building a checkbox list from a database query and retaining the checkbox after a form submit

Building a checkbox list from a database query and retaining the checkbox after a form submit


By : RJK
Date : March 29 2020, 07:55 AM
Does that help Just check if the current email in the loop exists in $_POST['select'], if it is, you check it, if it is not, clear the check. This check will be displayed in the input checkbox as :
code :
 <?php
     while($row = $result->fetch_assoc()) {
         unset($email);
         $email = $row['Email'];
         // IF EMAIL EXISTS IN $_POST, CHECK IT.
           $checked = "";
           if(isset($_POST['select'])){
                $shift = $_POST['select'];
                $list = implode(", ", $shift);
                if (strpos($list,$email)===false)
                     $checked = "";         // EMAIL NOT IN $_POST.
                else $checked = "checked";  // EMAIL IS IN $_POST.
           }
 ?>
 <tr><td><input type="checkbox" name="select[]" <?php echo $checked;?>
          value="<?php echo $email;?>"/><?php echo $email; ?></td></tr>
 <?php
     }
 ?>
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