http://www.codeproject.com/Articles/43025/A-LINQ-Tutorial-Mapping-Tables-to-Objects

http://www.codeproject.com/Articles/43025/A-LINQ-Tutorial-Mapping-Tables-to-Objects

MessageBox for confirmation

Code snipplet:

 var messageBoxResult = MessageBox.Show(AppResources.TextDeleteConfrimation,  
             AppResources.TextDelete, MessageBoxButton.OKCancel);  
 if (messageBoxResult == MessageBoxResult.OK)  
 {  
   DeleteSomething();  
 }  

my common git commands

git checkout master

git pull --rebase

// switch the working branch to master branch

// then, pull the things back.

// these things includes: the commits on master by your colleagues and

// other branch name created by your colleagues

// Then, update master branch to the latest commit

// combo 技

// 切換到 master, 把其他人做的更動拉回來

// 然後快轉到 master 最新的 commit 狀態

// 拉回來的東西包括了: 其他人在 master 上的 commit 跟其他人創立的 branch name

git checkout -b newBranchName

// 創立一個 local的新的branch 叫做 newBranchName

// 然後切換過去

git branch --track workingLocalBranchName remote/remoteBranchName
// creates a local working branch name, called "workingLocalBranchName"
// which is tracking the remote branch name called "remoteBranchName".
// the remote branch name can be found by "git branch -a"

/*

通常早上做完這兩個指令以後 

就開始寫 code

到下午, code改完了, bug修掉了以後 ...

*/

git gui

// it is better to do the commit and push here

// 最好在這裡做 commit 跟 push

gitk

// see the history of commits of the current branch

// each commit is identifed with unique SHA string, which can be found in this window

// 看目前 branch 的歷史紀錄

// 每一次 commit 都有一個 SHA id 對應

// 在這個畫面裡面可以看到每次 commit 的SHA id

/*

做 patch 了, 大家來 review

*/

git format-patch -1 --full-index

// if your modification only requires 1 commit

// this command is quicker

// 如果你只 commit 了一次

// 這個指令會做出這個 commit 的 patch 檔

git diff --full-index oldSHA..newSHA > patchFileName.patch

// diff all the commits from oldSHA to newSHA into the patchFileName.patch

// 把從 oldSHA 到  newSHA 的所有更動放到  patchFileName.patch

git diff --full-index master..localBranchName > xxx.patch

// diff between two branches

// 兩個 branch 做diff

/*

merge 到 master

*/

git cherry-pick SHA

// SHA represents a commit, no matter which branch it is on.

// this command grabs the commit identified by that SHA id,

// and put it on top of the local working branch.

// 把SHA所代表的那個 commit 拉過來, 丟到你打指令的這個 branch

git merge --squash localBranchName

// merge the working branch with localBranchNamebranch

// 把 localBranchName這個 branch 拉過來, merge到你打指令的這個 branch

git merge --squash origin/remoteBranchName

// merge with remoteBranchName branch

// 與遠端的 branch 做 merge

/*

如果 merge 有conflict... 請小心, 沒有指令可以幫你處理好conflict

*/

git reset --hard SHA

// 說對不起, 我想清楚再merge
// 回到SHA這個commit, 在這之後的commit都會不見

git reset --soft SHA

// 說對不起, 我想清楚再merge
// 回到SHA這個commit, 在這之後的commit都會變成已修改狀態

git gui

// 如果修好了conflict 記得要再 commit 一次

/*

其他指令

*/

git checkout localBranchName

// change the working branch to localBranchName branch

// ex: git checkout master

// Before checking out to another branch, there should not be any 

// editting modifications in the working branch.

// Make sure you stash or commit everything you've modified

// 更改你目前的打指令的這個 branch 到 localBranchName 這個 branch

// 更改 branch 之前, 必須確定目前的 branch 是乾淨的

// 所以, 所有的更動請先放到stash或是commit

git checkout -b newLocalBranchName origin/remoteBranchName

// Grab the remoteBranchName into newLocalBranchName

// 把遠端 remoteBranchName 整串拉回來, 放到 newLocalBranchName 

git status

// see the current status of tracked files, 

// or any new files that are not tracked.

// 看目前git 追蹤的檔案裡面, 那些做過更改

// 或是那些檔案沒有被tracked

git stash

// put the current modifications into the stash area. 

// it will 'clean' the current modifications and restore to 

// the lastest commit

// 把目前所做的更動放到stash, 會把目前的更動清掉,

// 恢復到最新的commit的狀態

git stash apply -1

// apply the first stash item from the stash area to the current editting files.

// 把stash裡面第一個東西拉出來, 對目前的檔案做更動

git stash clear

// clear the stash area

// 把 stash 清掉

git push origin:remoteBranchName
git push origin --delete remoteBranchName

// Remove remoteBranchName on the remote side.

// 把遠端的一個叫做 remoteBranchName 的 branch 殺掉

git branch -D localBranchName

// remove the localBranchName branch

// 把本地端的 localBranchName 這個 branch 殺掉

// 新的gerrit server有內建code review的功能
/*
以前都是做patch
丟上review board
過了以後
再cherry-pick到master branch

這個對我來說的新功能是
remote的branch有兩個同名同姓的
只是在不同的refs的HEAD
要先push到HEAD:refs/for/<remoteBranchName>
commit就會出現在review board上了
review過了以後
這個 commit就會跑到 remote/origin/<remoteBranchName>了
*/
git push origin HEAD:refs/for/<remoteBranchName>



git apply --stat XXX.patch   // see the stats of the patch files
git apply --check XXX.patch 
git apply XXX.patch  

// git ignore mode changes:
git config core.filemode false

// list files changed between two SHAs:

git diff --name-only SHA1 SHA2

Share something by email on windows phone 8

In xaml file, let's say we have a button like this:

     <Button x:Name="tellAFriendButton" Width="352" Height="47"   
         Click="OnClickTellAFriendButton"  
         Style="{StaticResource TellAFriendButtonStyle}" Margin="174,241,274,0"   
         Template="{StaticResource TellAFriendControlTemplate}">  
     </Button>  

In c#:

     private void OnClickTellAFriendButton(object aSender,  
         System.Windows.RoutedEventArgs aRoutedEventArgs)  
     {  
       var emailAddressChooserTask = new EmailAddressChooserTask();  
       emailAddressChooserTask.Show();  
       emailAddressChooserTask.Completed +=  
                     EmailAddressChooserTaskCompleted;  
     }  
     void EmailAddressChooserTaskCompleted(object aSender,  
                     EmailResult aEmailResult)  
     {  
       var emailComposeTask = new EmailComposeTask();  
       emailComposeTask.To = aEmailResult.Email;  
       emailComposeTask.Body = ComposeEmailBody();  
       emailComposeTask.Show();  
     }  

Where composeEmailBody() is a function that returns a string, you can implement it in your own needs.

Estimate an App

T-shirt size.



Tasks                            |         Estimate
---------------------------------------------
Pre-development
Task A
Task B
..
..
Development
Task C
Task D
..
Post-development
Task E
Task F
..
------------------------------------------------
Total days

How to get the path to the image file that is associated to the image element on windows phone 8.

       var bitmapImage = ImageElement.Source as BitmapImage;  
       if (bitmapImage != null)  
         ImagePath = bitmapImage.UriSource.ToString();  

How to load string from resource in Windows phone 8.

Like this:

AppNameSpace.Resources.AppResourses.StringKeyName


this will work on windows phone 8.

How to load a string from Resource.resw, and add a item to settings panel on Windows 8

The keyword is SettingsPane.

 In OnLaunched() in App.xaml.cs:

 SettingsPane.GetForCurrentView().CommandsRequested += CommandsRequested;  

Then implement CommandsRequested() itself.

     private void CommandsRequested(SettingsPane aSender, SettingsPaneCommandsRequestedEventArgs aEventArgs)  
     {  
       // Retrieve all the strings first  
       var loader = new Windows.ApplicationModel.Resources.ResourceLoader();  
       string settingsCommandId = loader.GetString("aText");  
       string label = loader.GetString("aText");  
       //add the commands to the setting panel  
       aEventArgs.Request.ApplicationCommands.Add(  
         new SettingsCommand(settingsCommandId, label, aMethod));  
 }  

code style generator

http://codeformatter.blogspot.tw/

Pivot item on Windows phone 8

        <phone:Pivot Title="A_title">
            <phone:PivotItem Header="History">
               
            </phone:PivotItem>

            <phone:PivotItem Header="Favorites">

            </phone:PivotItem>

            <phone:PivotItem Header="Scan">

            </phone:PivotItem>

            <phone:PivotItem Header="Creator">

            </phone:PivotItem>

            <phone:PivotItem Header="Settings">

            </phone:PivotItem>
        </phone:Pivot>

Use ZXing library to decode/encode 2D barcode

Using ZXing in c#

How to decode a 2D barcode into text

The code snippet:

try
{
    // Get the width and height of the bitmap, 
    //and change it to a WriteableBitmap object
    int width = mBitmap.PixelWidth; 
    int height = mBitmap.PixelHeight;
    WriteableBitmap writableBitmap = new WriteableBitmap(mBitmap);

    // use RGBLuminanceSource and HybridBinarizer class to
    // process the WriteableBitmap into a BinaryBitmap
    var lsource = new RGBLuminanceSource(writableBitmap, width, height);
    Binarizer zer = new HybridBinarizer(lsource);
    BinaryBitmap binaryBitmap = new BinaryBitmap(zer);

    // Decode the binaryBitmap useing the QRCodeReader object
    QRCodeReader qrReader = new QRCodeReader();
    Result result = qrReader.decode(binaryBitmap);

    // the decoded text in place in the Result object.
    Title.Text = result.Text;
}
catch (Exception ex) // catch the exception here!!!
{
    System.Diagnostics.Debug.WriteLine(ex);
}

How to encode a text into a 2D barcode

The library will encode the text into ZXing-defined ByteMatrix. Here is the code snippet:

string encodeText = TextToEncode.Text;
if (!String.IsNullOrEmpty(encodeText))
{
    // use MultiFormatWriter class to encode.
    var qrCodeWriter = new MultiFormatWriter();
    var matrix = qrCodeWriter.encode(TextToEncode.Text, 
                                     BarcodeFormat.QR_CODE, 400, 400);

    var bitmap = ToBitmap(matrix);
    resultImage.Source = bitmap;
}

Then, ToBitmap() function is used to get the BitmapImage object from the ByteMatrix:

private WriteableBitmap ToBitmap(ByteMatrix aMatrix)
{
    int width = aMatrix.Width;
    int height = aMatrix.Height;
    var bitmap = new WriteableBitmap(width, height);
    for (int x = 0; x < width; x++)
    {
        for (int y = 0; y < height; y++)
        {
            if (aMatrix.get_Renamed(x, y) == -1)
            {
                bitmap.Pixels[y * width + x] =
                   BitConverter.ToInt32(BitConverter.GetBytes(0xffffffff), 0);
            }else
            {
                bitmap.Pixels[y * width + x] =
                   BitConverter.ToInt32(BitConverter.GetBytes(0x00000000), 0);
            }
        }
    }
    return bitmap;
}