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To force a web server to send a fresh copy (not a cached copy) of the requested document, add a “Pragma: non-cache” HTTP header to the request. If sending a HTTP GET request via these methods: QuickGet, QuickGetStr, Download, etc., then add the Pragma header by calling httpObject.SetRequestHeader(“Pragma”,”no-cache”) prior to sending the GET. If the Chilkat HTTP Request object is […]
This table shows which objects are contained in which DLLs. If you use an object in the left-hand column of the table, then you need to deploy the corresponding DLL in the right-hand column. AppSettings ChilkatUtil.dll
Question: May I know that which Zip method in your component could give the best compression? We are trying to Zip some JPEG, and perhaps could reduce the size by half or more. Answer: The JPG file format is already a compressed format, so usually very little is gained in trying to compress it — the result is a lot […]
Demonstrates how to use Chilkat.Compression to compress a string to a byte array: Private Sub CompressStringToBytes() Dim compress As New Chilkat.Compression() ‘ Any string argument automatically begins a 30-day trial. Dim success As Boolean success = compress.UnlockComponent(“30-day trial”) If (success <> True) Then MsgBox(“Compression component unlock failed”) Exit Sub End If ‘ Use the “deflate” algorithm, which is the algorithm […]
If UnlockComponent or UnlockBundle fails, check the following. (For more information about how UnlockComponent works, please read this: How UnlockComponent works. You must pass the exact unlock code provided in your receipt email. The unlock code is case sensitive. If you are confident that you are passing the correct unlock code to UnlockComponent (or UnlockBundle), but it returns a failed […]
The downloads at http://www.chilkatsoft.com/downloads.asp are the full-versions of the products, but may also be used in a fully-functional 30-day trial mode. A Chilkat component/class is unlocked at runtime by calling the UnlockComponent method. This method must be called once from within your application prior to using any Chilkat objects. It is not required to call UnlockComponent for each instance of […]
To use Chilkat SFTP (Secure File Transfer over SSH) you must use the unlock code for Chilkat SSH. It should contain the substring “SSH”. If your unlock code contains the string “FTP”, then you are using the FTP2 unlock code, which is incorrect. The SFTP component/API is part of the “Chilkat SSH” license: “SFTP” is the Secure File Transfer Protocol […]
The “An attempt was made to load a program with an incorrect format.” indicates that your program attempted to load a win32 assembly on an x64 Windows OS, or the reverse. There is a separate Chilkat .NET assembly also named ChilkatDotNet2.dll for 64-bit Windows. It may be downloaded at: http://www.chilkatsoft.com/downloads.asp This is for the 2.0/3.5 (or greater) Framework. There is […]
Question: I have 21 text message service applications running on a single PC. These apps send out weather alerts to radio station listeners several times a day. Each may have a few subscribers to a few hundred subscribers, so at the top of the hour, the messages for the people signed up for that hour are sent. I sometimes get […]
Here’s an explanation for the following error message: Established TCP/IP connection with SSH server FromServer: SSH-1.5-Cisco-1.25 numBytesRequested: 8 Connection closed by server. Failed to read data on SSH connection. Failed to read 1st key exchange packet Failed. The error message indicates that as soon as the TCP/IP socket connection was accepted by the SSH server, it then decided to disconnect. […]