get selected values form a checkboxlist c# asp.net web application

List selectedRoles = cblRolesAdd.Items.Cast().Where(n => n.Selected).Select(n => n.Value).ToList();

asp.net c# write to txt file

string path = HttpContext.Current.Server.MapPath("~/xxxxxxxx.txt");
                if (!System.IO.File.Exists(path))
                {
                    // Create a file to write to.
                    using (StreamWriter sw = System.IO.File.CreateText(path))
                    {
                        sw.WriteLine("-------------------------------------------------------------------------------------------------------------------------------------");
                        sw.WriteLine("-------------------------------------------------------------------------------------------------------------------------------------");
                        sw.WriteLine("------------------------Some explanation of the purpose of this file-----------------------------");
                        sw.WriteLine("-------------------------------------------------------------------------------------------------------------------------------------");
                        sw.WriteLine("-------------------------------------------------------------------------------------------------------------------------------------");
                    }
                }
                using (StreamWriter sw = System.IO.File.AppendText(path))
                {
                    StringBuilder sb = new StringBuilder();
                    sb.AppendLine("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
                    sb.AppendLine("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
                    sb.AppendLine("WHEN: " + DateTime.Now.ToString());
                    sb.AppendLine("WHO: " + GetCurrentUser());
                    IPHostEntry host;
                    host = Dns.GetHostEntry(Dns.GetHostName());
                    foreach (IPAddress ip in host.AddressList)
                    {
                        if (ip.AddressFamily.ToString() == "InterNetwork")
                        {
                            sb.AppendLine("WHERE: " + ip.ToString());
                            break;
                        }
                    }
                    sb.AppendLine("WHAT: " + errorMsg);
                    sb.AppendLine();
                    sb.AppendLine();
                    sb.AppendLine();
                    sw.WriteLine(sb.ToString());
                }

.NET Web Application install default SqlMembershipProvider schema

find and run the following executable inside "%Windows\Microsoft.NET\[framework number]\[version number]\"

aspnet_regsql.exe

RadGrid ItemCommand Find Control

if the control you are looking for is a button:
((Button)e.CommandSource)


if the control you are looking for is a label:
((Label)e.CommandSource)

RadWindow Resize by Percentage

var width = $telerik.$(window).width() * 0.8;
                    var height = $telerik.$(window).height() * 0.95;
                    ExpWindow.setSize(width, height);
                    ExpWindow.center();

StimulSoft Report Web Designer Save Report

protected void StiWebDesigner1_SaveReport(object sender,

StiWebDesigner.StiSaveReportEventArgs e)

{

StiReport report = e.Report;

        string file = report.ReportFile;

        report.Save(file);

}

Access controls inside (NestedViewTemplate) GridNestedView of RadGrid

RadGrid bind detail table in code behind

protected void RadGrid1_DetailTableDataBind(object source, Telerik.Web.UI.GridDetailTableDataBindEventArgs e) { GridDataItem dataItem = (GridDataItem)e.DetailTableView.ParentItem; switch (e.DetailTableView.Name) { GetDataByParentId(dataItem.GetDataKeyValue("Id").ToString()); } }

c# .net web application add server control into literal using stringbuilder

StringBuilder sb = new StringBuilder();
TextBox TextBox1 = new TextBox ();
TextBox1.ID = "TextBox1";
TextBox1.Text = "Hello World";
using (StringWriter sw = new StringWriter(sb))
{
using (HtmlTextWriter tw = new HtmlTextWriter(sw))
{
TextBox1.RenderControl(tw);
}
}

tsql update datetime value

datetime value can be updated using the following query:
e.g. I want to replace the year value with '2012'

update table1

set date = convert(datetime,'2012'+'-'+convert(varchar(3),MONTH(date))+'-'+convert(varchar(3),DAY(date))+' '+ convert(varchar(12),convert(time,date))),

  CompletedDate = convert(datetime,'2012'+'-'+convert(varchar(3),MONTH(CompletedDate))+'-'+convert(varchar(3),DAY(CompletedDate))+' '+ convert(varchar(12),convert(time,CompletedDate)))

where [condition]

tsql add primary key column on existing table

I can add a new column to an existing table no problem, but i had problem making it an autoincrement int primary key. After some research I found the solution: "Identity" keyword:

if not exists(SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'table1' AND COLUMN_NAME = 'ID')
begin

    ALTER TABLE dbo.table1
    add ID int identity not null
       
end
go

solution to: c# asp.net usercontrol javascript only executes first time

I have this line to run a javascript from code behind:
ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "sbScript", sbScript.ToString(), false);

This line is inside pageload event of the usercontrol that I used my my aspx page. The user control is used multiple times on the aspx page. The javascript is therefore called multiple times. However the script only works the first time.

The reason being is because the script name specified is always "sbScript" which has been assigned value when first run. The solution is to make sure the script name is set to different values everytime the line is executed.

Attempt by security transparent method 'xxxxxxxxx' to access security critical method 'xxxxxxxx' failed.

I converted my website to a web application and upgraded .net framework from v3.5 to v4. I also setup a class library to host entity framework models for the web app to consume. At run time when the business logic calls the entity framework class library I got this error below.

Attempt by security transparent method 'xxxxxxxxx' to access security critical method 'xxxxxxxx' failed.

Assembly 'xxxxxxxxxxx' is marked with the AllowPartiallyTrustedCallersAttribute, and uses the level 2 security transparency model.  Level 2 transparency causes all methods in AllowPartiallyTrustedCallers assemblies to become security transparent by default, which may be the cause of this exception.

 The solution is to specify the security level in the business logic project AssemblyInfo.cs, add the following line:
[assembly: System.Security.SecurityRules(System.Security.SecurityRuleSet.Level1)]

 

asp.net web application: assembly generation failed referenced assembly does not have a strong name

in my asp.net web application I got this problem when added a new class library into my solution and trying to build the solution:
"assembly generation failed referenced assembly does not have a strong name"

Apparently the solution is to go to the class Project properties: Solution Explorer > right click > properties, click on Signing tab, select "Sign the assembly", then browse the key shared among other projects within the same solution.

radeditor hide the empty bottom area

jquery get asp.net label text

var labelText = $('#<%= lblabc.ClientID %>').html();

jquery find server control checkbox checked state

if ($('#isAgeSelected').is(':checked')){
//your code here
}

tsql get part of a datetime value

DATEPART(portion, datetimevalue)

the options for portion are:

Ms for Milliseconds
Yy for Year
Qq for Quarter of the Year
Mm for Month
Dy for the Day of the Year
Dd for Day of the Month
Wk for Week
Dw for the Day of the Week
Hh for Hour
Mi for Minute
Ss for Second

e.g.
select startdate,DATEPART(Hh,a.startdate)

this returns the hour of startdate

mvc format databound datetime column

if you want something like "22/11/2012 15:00" then use
columns.Bound(o => o.MyDateTimeValue).Format("{0:dd/MM/yyyy HH:mm}").Width(120);

if you want something like "22/11/2012 3:00 PM" then use
columns.Bound(o => o.MyDateTimeValue).Format("{0:dd/MM/yyyy hh:mm tt}").Width(120);

t-sql add new line in code

i keep forgetting this simple solution:
char(13)
now I save it here so that I never forget again