C# programming: Debug and trace

To generate a trace, use

System.Diagnostics.Trace.WriteLine("some trace");

This code works when TRACE is turned on during compiling. Add the compile option in web.config:

<compilation defaultLanguage="c#" debug="true" targetFramework="4.5">
  <compilers>
    <compiler language="c#" ... compilerOptions="/d:DEBUG;TRACE" />
  </compilers>
</compilation>

During the development, the trace can be found in the Visual Studio's console. If the application is deployed, the trace can be seen with the tool Debugview, which can be downloaded from:

https://docs.microsoft.com/en-us/sysinternals/downloads/debugview

ProgressBar not shown due to animation disabled on phone | Android Programming

I noticed the ProgressBar used in my app suddenly stopped working.

<ProgressBar
    style="?android:attr/progressBarStyleLarge"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/progressBar"
    android:progressDrawable="@drawable/circular_progress_bar"/>



res/drawable/circular_progress_bar.xml:

<?xml version="1.0" encoding="utf-8"?>
<rotate
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="90"
    android:pivotX="50%"
    android:pivotY="50%"
    android:toDegrees="360">

    <shape
        android:innerRadiusRatio="3"
        android:shape="ring"
        android:thicknessRatio="7.0">

        <gradient
            android:centerColor="#2277DD"
            android:endColor="#2277DD"
            android:startColor="#2277DD"
            android:angle="0"
            android:type="sweep"
            android:useLevel="false" />
    </shape>

</rotate>

I played with the code for an hour or so but cannot find out why. It turned out the reason is that I had turned off animation on my phone. To turn it back on, go to Settings/Developer options, find all the "animation scale" options and set the scales to a value other than "Animation off". Restart the app on the phone and the ProgressBar will come back.