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360Agileweb

Using C# String.Format “{0:p0}” without the leading space before percentage sign

Simplest expresssion is:  

String.Format(“{0:0%}”, 0.10)

A more elegant solution is:  

Use the NumberFormatInfo.PercentPositivePattern Property: 

NumberFormatInfo numberInfo = new NumberFormatInfo();
numberInfo.PercentPositivePattern = 1;
Console.WriteLine(String.Format("{0}", 0.10.ToString("P0",numberInfo)));
360Agileweb

Coding Standards, why the heck?

Coding standards. Yes. Coding standards. Why do we need them?

I was reviewing our companies coding style document and thought I share with you some references I have come across.

The essence of enforcing coding standards is to have coding style – which is good for management of your code base and consistency. And overall, improves productivity of your developers.

Here are some useful links on coding style:

Brad Abrams Internal coding style
MSDN: Design Guidelines for Developing Class Libraries
Google C++ Style Guide

360Agileweb

Calling ASP.NET WebMethod with more than one paramaters using JSON

Suppose we have a web method in ASP.NET web form or webservice

 [WebMethod]   
 public void GetItems(string itemName, string itemDesc)
 {

 }
 Using jQuery, we are going to call this method using the code like this below. I am pre-suming there is a search button which we have assigned id #searchNow
 
 $(document).ready(function () {  
  $(‘#searchNow’).click(function () {
  $.ajax({
     type: “POST”,
     url: “SearchItems.aspx/GetItems”,
     data: “{‘itemName’:’book’,’itemDesc’:’toys’}”,
     contentType: “application/json; charset=utf-8”,
     dataType: “json”,
            success: function (msg) {
           
            }
        });
 });  Our interest is how to pass parameters to the web method.
 In the snippet above the line

 data: “{‘itemName’:’book’,’itemDesc’:’toys’}”,


is used to pass parameters to the GetItems function. Please not that it must be a JSON compliant string

 

360Agileweb

Common mistake in ASP.NET Forms Authentication

We are all used to this now…


    

    

    

    

In ASP.NET Forms authentication, you can allow access to particular users or deny them using the allow and deny tags. Likewise, you can allow or deny access to particular roles.
E.g. to allow access to a page, say Customer, you will do


  

        

             //Allow users in Customers role

         // Deny rest of all users

    

   

Common Mistake is to place 

 before 



This web config below will not allow users even if they are in Customers role


  

        

             // Deny rest of all users

             //Allow users in Customers role       

    

   

360Agileweb

ASP.NET Error Bar Chart

The Error Bar chart type consists of lines with markers that are used to display statistical information about the data displayed in a graph. A series of the Error Bar chart type has three Y values. While these values can be manually assigned to each point, in most cases, the values are calculated from the data present in another series. The order of the Y values is important because each position in the array of values represents a value on the error bar.


Adding Error Bar series to another series on same chart
Lets say we have a chart named Chart1 and series named Series1. 
We can add the Error Bar series to Series1 using the following snippet…
.

     Series errorBarSeries = new Series(“ErrorBar”);  

            errorBarSeries.ChartType = SeriesChartType.ErrorBar;  

            errorBarSeries.MarkerBorderColor = Color.FromArgb(64, 64, 64);  

            errorBarSeries.MarkerSize = 6;  

            errorBarSeries.YValuesPerPoint = 3;  

            errorBarSeries.BorderColor = Color.FromArgb(180, 26, 59, 105);  

            errorBarSeries.Color = Color.FromArgb(252, 180, 65);  

            errorBarSeries.ShadowOffset = 1;  

            errorBarSeries.MarkerStyle = MarkerStyle.None;  

            errorBarSeries[“PointWidth”] = “0.1”;  

            double error = 100;  

            foreach (DataPoint point in Series1.Points)  

            {  

                double centerY = point.YValues[0];  

                double lowerErrorY = centerY – error;  

                double upperErrorY = centerY + error;  

                errorBarSeries.Points.AddXY(point.XValue, centerY, lowerErrorY, upperErrorY);  

            }  

            Chart1.Series.Add(errorBarSeries); 

.
Calculating Error Values from Another Series
This can be done using the following code snippet.

  // Populate series with data
    double[]    yValues = {32.4, 56.9, 89.7, 98.5, 59.3, 33.8, 78.8, 44.6, 76.4, 68.9};
    Chart1.Series[“DataSeries”].Points.DataBindY(yValues);

    // Set error bar chart type
    chart1.Series[“ErrorBar”].ChartType = SeriesChartType.ErrorBar;

    // Link error bar series with data series
    Chart1.Series[“ErrorBar”][“ErrorBarSeries”] = “DataSeries”;

    // Set error calculation type
    Chart1.Series[“ErrorBar”][“ErrorBarType”] = “StandardError”;

    // Set error bar upper & lower error style
    Chart1.Series[“ErrorBar”][“ErrorBarStyle”] = “UpperError”;

    // Set error bar center marker style
    Chart1.Series[“ErrorBar”][“ErrorBarCenterMarkerStyle”] = “Circle”;
Adapted from:
MSDN Error Bar Chart     
Social MSDN Error Bar Chart
360Agileweb

Printer Trays Hell, View Pro and Vb 6

Hi Everyone,

I am a Windows Applications developer.

Have you come across hell when trying to specify printer’s Paper Source Trays from Vb6 application? I have actually been to hell!

Problem:
VB 6 exposes a Printer object, which points to the currently active printer for the current user profile in Windows. You can manipulate this object directly and set the printer trays with easy. However, if you use a third party tool called ViewPro you may experience problems.

ViewPro hides the printer object and at times it passes the wrong values for the printer trays.

Cause
ViewPro exposes a property called ‘DefaultSource’ which is an Enum, whilst the printer tray Ids may not lie in the Enum definations

Result
Print jobs may not always print to the correct trays. You have to find ways of circumventing the ViewPro and print directly to the printer.