Copy a network (shared folder) file using c#

Recently I came across a requirement to copy a network file (shared folder file) in regular time interval. I tried many options. Finally following approach worked properly.

We can do following-

1. Login to a user account using c#.
2. Impersonate as the logged in user.
3. Copy the file using System.IO.File.Copy.

For step 1 we can login to a user account using LogonUser of advapi32.dll. To consume this method we need to do dll import as follows. We can add the following method in the current class-

[System.Runtime.InteropServices.DllImport("advapi32.dll", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Unicode)]
public static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken);

We can see the detail of the method here-

http://msdn.microsoft.com/en-us/library/windows/desktop/aa378184%28v=vs.85%29.aspx

Next we can call the method like below-

IntPtr tokenHandle = new IntPtr(0);
bool returnValue = LogonUser("usermane", "domain", "password", 2, 0, ref tokenHandle);
if (!returnValue)
throw new Exception("Logon failed.");

For step 2 we can impersonate the logon user by the Impersonate method of WindowsIdentity class as follows-

System.Security.Principal.WindowsImpersonationContext impersonatedUser = null;
System.Security.Principal.WindowsIdentity wid = new System.Security.Principal.WindowsIdentity(tokenHandle);
impersonatedUser = wid.Impersonate();

And finally for step 3 we can copy the file as-

System.IO.File.Copy("SourceFile", "DestinationFile", true);

For source and the destination file either a network file or a local file. We also need to take care of proper access right of the shared folder.

Copy or duplicate column data in a table using context menu

This is a simple post used to copy data in a cell of a table to other cells of the same column. For this post we will be using a very simple HTML layout as follows-

<table>
        <tr>
            <th>data 1</th><th>data 2</th>
        </tr>
        <tr>
            <td><input type="text" /> </td>
            <td><input type="text" /> </td>
        </tr>
       <tr>
            <td><input type="text" /> </td>
            <td><input type="text" /> </td>
        </tr>
        <tr>
            <td><input type="text" /> </td>
            <td><input type="text" /> </td>
        </tr>
        <tr>
            <td><input type="text" /> </td>
            <td><input type="text" /> </td>
        </tr>
        <tr>
            <td><input type="text" /> </td>
            <td><input type="text" /> </td>
        </tr>
    </table>

For context menu we are going to use this plugin.

For content menu we are using the following HTML for the menu content, which include two options- copy and cancel. HTML for the context menu is as follows-

    <ul id="myMenu" class="contextMenu">
        <li class="copy"><a href="#copy">Copy value</a></li>
        <li class="quit separator"><a href="#cancel">Cancel</a></li>
    </ul>

For implementing the context menu we need to take the following files references or we can download from the desired location-

    <script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.5.js" type="text/javascript"></script>
    <script src="http://labs.abeautifulsite.net/archived/jquery-contextMenu/demo/jquery.contextMenu.js"
        type="text/javascript"></script>
    <link href="http://labs.abeautifulsite.net/archived/jquery-contextMenu/demo/jquery.contextMenu.css"
        rel="stylesheet" type="text/css" />

Now we can use following JavaScript code for copying/duplicating the data in a column-

    <script type="text/javascript">
        $(document).ready(function () {
            $("table input").contextMenu({
                menu: 'myMenu'
            }, function (action, el, pos) {
                if (action == "copy") {
                    index = el.closest("tr").children().index(el.parent()[0]);
                    $("table tr").each(function (i, item) {
                        $(item).find("td:eq(" + index + ") input").val(el.val());
                    })
                }
            });
        });
    </script>