Find max value of a column in a DataTable c#

C# > System.Data   > DataTable > Max Value

Find max value of a column in a DataTable C#.

var maxValue = DataTable1.AsEnumerable().Max(r => r.Field<double>("value"));

Telerik report bind to DataTable and add a sample calculated field

Telerik > Reporting > Bind to DataTable

Example
Bind to DataTable and add a sample calculated field.

string connString = "Data Source=(local)\\SQLEXPRESS;Initial Catalog=HR;Integrated Security=True";

string cmdText = "SELECT FirstName, LastName FROM Person;";

SqlDataAdapter da = new SqlDataAdapter(cmdText, connString);

DataTable dt = new DataTable();

dataAdapter.Fill(dt);

Telerik.Reporting.ObjectDataSource ods = new Telerik.Reporting.ObjectDataSource();

ods.DataSource = dt;

ods.CalculatedFields.Add(new Telerik.Reporting.CalculatedField("FullName", typeof(string), "=Fields.FirstName + ' ' + Fields. LastName ")); 

Telerik.Reporting.Report rpt = new Telerik.Reporting.Report();

rpt.DataSource = objectDataSource;

Telerik.Reporting.InstanceReportSource reportSource = new Telerik.Reporting.InstanceReportSource();

reportSource.ReportDocument = rpt;

reportViewer1.ReportSource = reportSource;

reportViewer1.RefreshReport();

Choose Visual Basic Example

VB.NET > Functions > Choose

Returns a member of the list passed in Choice().
It is based on the value of Index. The first member of the list is selected when Index is 1.

Example

Dim choice = Choose(2, "val1", "val2", "val2") // "val2"

Appends text to a file C#

C# > Files > File Class > AppendText

Appends text to an existing file or create a new file if the specified file does not exist.

Example

using(System.IO.StreamWriter sw = System.IO.File.AppendText(@"c:\log.txt"))

{
      sw.WriteLine("logline");
}

Convert to double TimeSpan C#

C# > System > TimeSpan Structure

TimeSpan represents a time structure.

Examples

1. Convert to double

   

  TimeSpan ts = TimeSpan.FromMinutes(12.45);

  double time = ts.TotalMinutes;

SOUNDEX SQL Server Example

SQL Server > Built-in Functions > SOUNDEX

SOUNDEX converts an alphanumeric string to a four-character code that is based on how the string sounds when spoken. 

Example

SELECT SOUNDEX ('Jan'), SOUNDEX ('Jane');

Result:

(No column name) (No column name)

J500                 J500

TRY_CAST SQL Server Example

SQL Server > Built-in Functions > TRY_CAST

Try to cast a value to the specified data type. 
If the cast not succeeds returns null.

Example

SELECT

    CASE WHEN TRY_CAST('1' AS float) IS NULL

    THEN 'Cast failed'

    ELSE 'Cast succeeded'

END AS Result;

Result

Cast succeeded

SELECT

    CASE WHEN TRY_CAST('xx' AS float) IS NULL

    THEN 'Cast failed'

    ELSE 'Cast succeeded'

END AS Result;

Result

Cast failed