Here is the sample JavaScript code to demonstrate that how can we validate a checkbox list inside the aspx page. Just call function vldChkBoxlist() and it will validate your checkbox list.

function vldChkBoxlist()
{
var tableBody = document.getElementById(‘CheckBoxList1’).childNodes[0];
for (var i=0;i<tableBody.childNodes.length; i++)
{
var currentTd = tableBody.childNodes[i].childNodes[0];
var listControl = currentTd.childNodes[0];
if (listControl.checked =true)
{
listControl.checked = false;
}
return false;
}

Creating images in .Net is not a big task.This can be done using a bitmap object & graphics object. Using thease objcts we can create our own images or any graphicle objects.

Public Void CreateImage()
{
System.Drawing.Bitmap objBMP = new System.Drawing.Bitmap(1500, 600);
 
System.Drawing.Graphics objGraph = System.Drawing.Graphics.FromImage(objBMP);
objGraph.Clear(System.Drawing.Color.Gray);
objGraph.DrawString("Hello Anil.", new System.Drawing.Font("Courier", 10), Brushes.Green, 70, 90);
objBMP.Save("D:\\Anil\\Sample.bmp", System.Drawing.Imaging.ImageFormat.Bmp); //Please provide your path here tp save the image
}

ASP.NET Coding Standards and Guidelines

1. Prefix user control names with “uc”

2. The rest of the user control name should be in Pascal Casing (Ex. ucMyUserControl)

3. Do not use session variables throughout the code. Use session variables only within the classes and expose methods to access the value stored in the session variables.

4. Do not store large objects in session, it may consume lot of server memory depending on the number of users.

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Database Coding Standards and Guidelines

1. ANSI SQL 92 standards have to be followed for writing queries.

2. Do not put order by clause in the query unless required.

3. Do not encapsulate readonly database operations in transactions.

4. Use a stored procedure with output parameters instead of single record SELECT statements when retrieving one row of data.

5. Stored procedure execution is fast when we pass parameters by position (the order in which the parameters are declared in the stored procedure) rather then by name.

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C# Coding Standards and Guidelines: Error Handling

1. Error handler should be present whenever you anticipate possibility of error.

2. Do not use Try-catch for flow- control.

3. Never declare an empty catch block.

4. Error Message should be user friendly, simple and understandable.

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