It all works properly, but when I try to access the internet, it gives a warning with something like this: "The page is connecting with data outside the page's control. This is a risk for your security. Do you want to continue? I have to choose Yes or No. EventArgs Handles Button1. How can I let this stupid message disappear?
Friday, March 23, PM. What kind of code is that, VB. NET code? It is used in a normal form. As you are using VB. NET and the. The experience was frustrating for her because her impression was that it was taking a long time due to the post backs. The frustration level she was experiencing could have been easily alleviated by the developers of the application if they only used XMLHTTP to retrieve the data instead of posting back.
That's what this month's column is about. NET Web service without doing a post back. This is going to be really cool! Trust me. This is an extremely powerful technique. NET Web services quick and easy. However, this behavior is not supported and it's not the best way to update a page asynchronously. All of this will be done without a post back.
The Web service that I'll use is named DynaProducts. It is a basic ASP. NET Web service that is written in C and that contains the following three methods. GetProducts — Returns a DataSet that contains all products of the category that are passed to the method. The first thing that may strike you about this sample is that the page that I'm updating though the ASP.
NET page. It's just a regular HTML page. However, I've added a fair amount of client-side JavaScript to the page, and it's that script that makes the calls to the Web service. Let's look at the first snippet of code from the HTML page.
This is the largest piece of code from the page, and I want to go over it in detail so you'll understand what's going on. At the top of this script block, I created two variables: objHttp and objXmlDoc. Immediately after that is the function definition for the getDataFromWS function. This is the function that is responsible for making the client-side call to the Web service.
It takes the following four arguments, two of which are optional:. Let's break the getDataFromWS function into parts and discuss each one. Here's the first snippet:. Simply browse to the Web service, and click one of the methods to see a SOAP envelope for that method.
So far, so good. When all of the data has been received back from the Web service, the readyState property changes to a value of 4. The onreadystatechange property for the XMLHTTP object allows you to set up a callback function that will be called when the readyState property changes. Once all data has been received, I create an XML data island with the response by using the responseText property. As you likely know, the response from a Web service is in XML format.
NET DataSet. The next section of this code block uses a switch statement to call the appropriate function based on the name of the DataSet that is returned from the Web service. I'll go into the code for those functions in detail a bit later. I then have an if statement that tacks on any parameters that are passed as a QueryString value.
Hopefully that sheds some light on the differences between the two. However the limited flexibility within XMLHTTP may force you to take-on the additional responsibilities with using ServerXMLHTTP, by having to negotiate server and destination end-point authentication mechanisms, although there are methods within winhttp to assist in this. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 9 years, 5 months ago. Active 4 years, 6 months ago. Viewed 22k times. I'm trying to write an Excel add-in that can get data from a web service into Excel. Improve this question. Community Bot 1 1 1 silver badge. Davuz Davuz 4, 13 13 gold badges 37 37 silver badges 57 57 bronze badges.
I have no knowledge regarding this issue in Windows Vista, Windows 7 or Windows 8. See: support. Add a comment. Active Oldest Votes.
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