Solved

convert windows client to web client

Posted on 2010-09-01
2
283 Views
Last Modified: 2012-05-10
i need help figuring out how to convert this windows client to a web client. My code from the web errors out at: fibertest = proxy.ListFiberTests();

Error:
Object reference not set to an instance of an object.

Question - wasnt that created at:  private System.Collections.ObjectModel.Collection<FiberServiceReference.FiberTest> fibertest = null;

Any suggestions?
Windows client code
private System.Collections.ObjectModel.Collection<FiberServiceReference.FiberTest> fibertest = null;
private FiberServiceReference.FiberTest[] fibertests = null;
private FiberServiceReference.FiberTestDetail fiberTestDetails = null;
private FiberServiceReference.FiberServiceClient proxy = null;

private void Form1_Load(object sender, EventArgs e)
{
proxy = new FiberServiceClient.FiberServiceReference.FiberServiceClient("WSHttpBinding_IFiberService");
}

private void listFiberTestsButton_Click(object sender, EventArgs e)
{
//get all rows of data
fibertest = proxy.ListFiberTests();

dataGridView1.AutoGenerateColumns = false;

DataGridViewTextBoxColumn idColumn = new DataGridViewTextBoxColumn();
idColumn.DataPropertyName = "FiberTestId";
idColumn.HeaderText = "Fiber Test Id";
idColumn.Name = "FTId";

DataGridViewTextBoxColumn workOrderColumn = new DataGridViewTextBoxColumn();
workOrderColumn.DataPropertyName = "WorkOrder";
workOrderColumn.HeaderText = "Work Order";

DataGridViewTextBoxColumn serialNumberColumn = new DataGridViewTextBoxColumn();
serialNumberColumn.DataPropertyName = "SerialNumber";
serialNumberColumn.HeaderText = "Serial Number";

dataGridView1.Columns.Add(idColumn);
dataGridView1.Columns.Add(workOrderColumn);
dataGridView1.Columns.Add(serialNumberColumn);

dataGridView1.DataSource = fibertest;
}

--------------------

web client
private System.Collections.ObjectModel.Collection<FiberServiceReference.FiberTest> fibertest = null;
private FiberServiceReference.FiberTest[] fibertests = null;
private FiberServiceReference.FiberTestDetail fiberTestDetails = null;
private FiberServiceReference.FiberServiceClient proxy = null;

protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
proxy = new FiberMossClient.FiberServiceReference.FiberServiceClient("WSHttpBinding_IFiberService");
}
}

protected void btnListFiberTests_Click(object sender, EventArgs e)
{
//get all rows of data
fibertest = proxy.ListFiberTests(); //*** Errors here

grdvwFiberTests.AutoGenerateColumns = true;
grdvwFiberTests.DataSource = fibertest;
grdvwFiberTests.DataBind();
}

Open in new window

0
Comment
Question by:vicomin
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 36

Accepted Solution

by:
Miguel Oz earned 500 total points
ID: 33582521
Your real problem is line 9
proxy = new FiberServiceClient.FiberServiceReference.FiberServiceClient("WSHttpBinding_IFiberService")
the proxy object is not initialized.

Are you using WCF to generate the web service. In WCF, you only need to do something like:
proxy = new FiberServiceClient();
The autogenerated class and config file will take care of the rest.

I will strongly suggest to delete your current web service reference and add it again (On project menu click "Add Service reference". Al so make sure your webe service is working properly. check:
http://www.xvpj.net/2008/03/08/wcf-step-by-step-tutorial/
http://msdn.microsoft.com/en-us/library/bb332338.aspx
http://blogs.msdn.com/b/ericwhite/archive/2010/05/11/getting-started-building-a-wcf-web-service.aspx
0
 

Author Closing Comment

by:vicomin
ID: 33589954
yah changed it to proxy = new FiberMossClient.FiberServiceReference.FiberServiceClient(); and added it to each method.
0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
ams360 2 148
,net web service 1 107
Windows Universal Application and Service References 3 200
WCF Rest Service Timeout Exception 3 223
This tutorial will show you how to add an attribute to an XML (http://en.wikipedia.org/wiki/XML) stream returned from a Windows Communication Foundation (http://en.wikipedia.org/wiki/Windows_Communication_Foundation) (WCF) Web Service.  Some knowled…
Here I am going to explain creating proxies at runtime for WCF Service. So basically we use to generate proxies using Add Service Reference and then giving the Url of the WCF service then generate proxy files at client side. Ok, what if something ge…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial
Suggested Courses

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question