Create SSIS Custom Task with complete example

Here i am sharing the easiest way to create a SSIS custom task.. this a "Hello World" Task.
by following this way can can create your own task very easily. also i have uploaded the solution folder, so you can modify it to create your own one.

also see my other posts to know more about SSIS custom task like a UI, Tabs on UI, Icon for your custom task etc..

Theory (be patience..)
Follow below 5 simple steps..

1. create a blank project (.dll/library type project)
2. add some fixed code/reference, you can say header. (Image-"Blank Project with Task Info")
3. override 3 procedures of inherited class "Task". (Image - "Override Procedures")
4. prepare get/set for input/output variables -- [this will be available in the expression option of SSIS task property!] (Image - "get-set")
5. create a strong key for this dll and attache with it! (Image - "Strong Name Key")
6. Install it (see my post)
7. Add Icon to this Task

Detail description on above steps ...

STEP 1: create a blank "Class Library" application in visual studio. for example "Test_Task".

STEP 2: add some fixed code, you can say header.

• Add Reference : add reference "Microsoft.SQLServer.ManagedDTS". you can find it on sql-server installed location ... "..\100\SDK\Assemblies\*.dll" (my case)
• Use Reference: add on top "using Microsoft.Sqlserver.Dts.Runtime;"
• Add Task Info: 
• add "[assembly: CLSCompliant(true)]" outside of namespace. see image.
• add below property for task - "[DtsTask(name="value",...)]", inside namespace but outside of class. see image
• Inherit the class "Task"
• see image "Blank Project with Task Info" 

  

  Blank Project with Task Info

STEP 3: override 3 procedures

• Inherit the class "Task"
• declare a variable to use .. my case - "private string text="Hello World SSIS...";"
• Now override 3 procedures of Task class .. Validate, InitilizeTask & Execute
• add code of lines from the image "override procedures".
• you can modify as you want

Override Procedures

STEP 4: prepare get/set for input/output variables

• prepare get-set for your variables ... see image "get-set"
• in my case this is "public string TestInput { get { return this.txet;} set { this.txet = value;}}"

get-set

STEP 5: create a strong key for this dll and attache with it! (see image for all - "Strong Name Key")

• NOW BUILD the SOLUTION
• a .dll file will be available in the debug OR release folder. thats out required .dll file :)
• go to "project properties". [on solution explorer ->right click on solution-> click properties]
• click -> "Signing" tab
• check "Sign the assembly"
• select "<New>.." [new window will open]
• un-check "Protect .. Password"
• give a name for you Stron Name Key (.snk) file in "Key file name".. my case "Test_Task"
• click "OK"
• a new item (.snk file) will be available (at bottom) in the "solution explorer". my case "Test_Task.snk"
• save the solution (ctrl+s)
• NOW BUILD the SOLUTION
• now the dll is ready to install in GAC .. check my post to install this dll as SSIS Task

Strong Name Key