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convert windows client to web client

Posted on 2010-09-01
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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();
}

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Question by:vicomin
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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.
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