// crate a surface
var info = new SKImageInfo(256, 256);
using var surface = SKSurface.Create(info);
// the the canvas and properties
var canvas = surface.Canvas;
// make sure the canvas is blank
canvas.Clear(SKColors.White);
// draw some text
using var typeface = SKTypeface.FromFamilyName("Tahoma");
using var paint = new SKPaint
{
Color = SKColors.Black,
IsAntialias = true,
Style = SKPaintStyle.Fill,
TextAlign = SKTextAlign.Center,
TextSize = 24,
Typeface = typeface,
};
var coord = new SKPoint(info.Width / 2, (info.Height + paint.TextSize) / 2);
canvas.DrawText("آزمایش", coord, paint);
// save the file
using var image = surface.Snapshot();
using var data = image.Encode(SKEncodedImageFormat.Png, 100);
using var stream = File.OpenWrite("farsi-text-1.png");
data.SaveTo(stream); <ItemGroup> <PackageReference Include="SkiaSharp" Version="2.88.3" /> </ItemGroup>
<ItemGroup> <PackageReference Include="SkiaSharp" Version="2.88.3" /> <PackageReference Include="SkiaSharp.HarfBuzz" Version="2.88.3" /> </ItemGroup>
// crate a surface
var info = new SKImageInfo(256, 256);
using var surface = SKSurface.Create(info);
// the the canvas and properties
var canvas = surface.Canvas;
// make sure the canvas is blank
canvas.Clear(SKColors.White);
// draw some text
using var typeface = SKTypeface.FromFamilyName("Tahoma");
using var shaper = new SKShaper(typeface);
using var paint = new SKPaint
{
Color = SKColors.Black,
IsAntialias = true,
Style = SKPaintStyle.Fill,
TextAlign = SKTextAlign.Center,
TextSize = 24,
Typeface = typeface,
};
var coord = new SKPoint(info.Width / 2, (info.Height + paint.TextSize) / 2);
canvas.DrawShapedText(shaper, "آزمایش", coord, paint);
// save the file
using var image = surface.Snapshot();
using var data = image.Encode(SKEncodedImageFormat.Png, 100);
using var stream = File.OpenWrite("farsi-text-2.png");
data.SaveTo(stream); 
به همین دلیل در سمت سرور، کلاسی خواهیم ساخت که نمایانگر یک مرورگر باشد. بدین صورت:
public class Browser
{
public int Id { get; set; }
public string Engine { get; set; }
public string Name { get; set; }
public string Platform { get; set; }
public float Version { get; set; }
public string Grade { get; set; }
}var $table = $('#browsers-grid');
$table.dataTable({
"bServerSide": true,
"sAjaxSource": "/Home/GetBrowsers"
});^[1-5]$
/// <summary>
/// Class that encapsulates most common parameters sent by DataTables plugin
/// </summary>
public class jQueryDataTableParamModel
{
/// <summary>
/// Request sequence number sent by DataTable,
/// same value must be returned in response
/// </summary>
public string sEcho { get; set; }
/// <summary>
/// Text used for filtering
/// </summary>
public string sSearch { get; set; }
/// <summary>
/// Number of records that should be shown in table
/// </summary>
public int iDisplayLength { get; set; }
/// <summary>
/// First record that should be shown(used for paging)
/// </summary>
public int iDisplayStart { get; set; }
/// <summary>
/// Number of columns in table
/// </summary>
public int iColumns { get; set; }
/// <summary>
/// Number of columns that are used in sorting
/// /// </summary>
public int iSortingCols { get; set; }
/// <summary>
/// Comma separated list of column names
/// </summary>
public string sColumns { get; set; }
}public JsonResult GetBrowsers(jQueryDataTableParamModel param)
{
IQueryable<Browser> allBrowsers = new Browsers().CreateInMemoryDataSource().AsQueryable();
IEnumerable<Browser> filteredBrowsers;
// Apply Filtering
if (!string.IsNullOrEmpty(param.sSearch))
{
filteredBrowsers = new Browsers().CreateInMemoryDataSource()
.Where(x => x.Engine.Contains(param.sSearch)
|| x.Grade.Contains(param.sSearch)
|| x.Name.Contains(param.sSearch)
|| x.Platform.Contains(param.sSearch)
).ToList();
float f;
if (float.TryParse(param.sSearch, out f))
{
filteredBrowsers = filteredBrowsers.Where(x => x.Version.Equals(f));
}
}
else
{
filteredBrowsers = allBrowsers;
}
// Apply Sorting
var sortColumnIndex = Convert.ToInt32(Request["iSortCol_0"]);
Func<Browser, string> orderingFunction = (x => sortColumnIndex == 0 ? x.Engine :
sortColumnIndex == 1 ? x.Name :
sortColumnIndex == 2 ? x.Platform :
sortColumnIndex == 3 ? x.Version.ToString() :
sortColumnIndex == 4 ? x.Grade :
x.Name);
var sortDirection = Request["sSortDir_0"]; // asc or desc
filteredBrowsers = sortDirection == "asc" ? filteredBrowsers.OrderBy(orderingFunction) : filteredBrowsers.OrderByDescending(orderingFunction);
// Apply Paging
var enumerable = filteredBrowsers.ToArray();
IEnumerable<Browser> displayedBrowsers = enumerable.Skip(param.iDisplayStart).
Take(param.iDisplayLength).ToList();
return Json(new
{
sEcho = param.sEcho,
iTotalRecords = allBrowsers.Count(),
iTotalDisplayRecords = enumerable.Count(),
aaData = displayedBrowsers
}, JsonRequestBehavior.AllowGet);
}$(function () {
var $table = $('#browsers-grid');
$table.dataTable({
"bProcessing": true,
"bStateSave": true,
"bServerSide": true,
"bFilter": true,
"sDom": 'T<"clear">lftipr',
"aLengthMenu": [[5, 10, 25, 50, -1], [5, 10, 25, 50, "All"]],
"bAutoWidth": false,
"sAjaxSource": "/Home/GetBrowsers",
"fnServerData": function (sSource, aoData, fnCallback) {
$.ajax({
"dataType": 'json',
"type": "POST",
"url": sSource,
"data": aoData,
"success": fnCallback
});
},
"aoColumns": [
{ "mDataProp": "Engine" },
{ "mDataProp": "Name" },
{ "mDataProp": "Platform" },
{ "mDataProp": "Version" },
{ "mDataProp": "Grade" }
],
"oLanguage": {
"sUrl": "/Content/dataTables.persian.txt"
}
});
});
public static class MyAttributes
{
[Obsolete]
public static void MyMethod1()
{
}
public static void MyMetho2()
{
}
} 
public class MyMaxLength:Attribute
{
} [MyMaxLength]
public class GetCustomProperties
{
//...
} public class MyMaxLength:Attribute
{
private int max;
public string ErrorText = "";
public MyMaxLength(int max)
{
this.max = max;
ErrorText = string.Format("max Length is {0} chars", max);
}
} [MyMaxLength(30)]
public class GetCustomProperties
{
//...
}
//or
[MyMaxLength(30,ErrorText = "شما اجازه ندارید بیش از 30 کاراکتر وارد نمایید")]
public class GetCustomProperties
{
//...
} [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct)]
public class MyMaxLength:Attribute
{
private int max;
public string ErrorText = "";
public MyMaxLength(int max)
{
this.max = max;
ErrorText = string.Format("max Length is {0} chars", max);
}
} [AttributeUsage(AttributeTargets.Property)]
public class User
{
[MyMaxLength(30, ErrorText = "شما اجازه ندارید بیش از 30 کاراکتر وارد نمایید")]
public string Name { get; set; }
} [AttributeUsage(AttributeTargets.Property,AllowMultiple = true)]
public class MyMaxLength:Attribute
{
//....
} [MyMaxLength(40, ErrorText = "شما اجازه ندارید بیش از 40 کاراکتر وارد نمایید")]
[MyMaxLength(50, ErrorText = "شما اجازه ندارید بیش از 50 کاراکتر وارد نمایید")]
[MyMaxLength(30, ErrorText = "شما اجازه ندارید بیش از 30 کاراکتر وارد نمایید")]
public string Name { get; set; } public class MyAttribute : Attribute
{
//...
}
[AttributeUsage(AttributeTargets.Method, Inherited = false)]
public class YourAttribute : Attribute
{
//...
} public class MyClass
{
[MyAttribute]
[YourAttribute]
public virtual void MyMethod()
{
//...
}
} public class YourClass : MyClass
{
public override void MyMethod()
{
//...
}
} Type type = typeof (User);
foreach (PropertyInfo property in type.GetProperties())
{
foreach (Attribute attribute in property.GetCustomAttributes(true))
{
MyMaxLength max = attribute as MyMaxLength;
if (max != null)
{
string Max = max.ErrorText;
//انجام عملیات
}
}
} [MyMaxLength(30, typeof(User))]