In one case i have to right a method to remove duplication from array of strings. i write this code Public Function RemoveDuplicates(ByVal items As String()) As String() Dim noDupsArrList As New ArrayList() For i As Integer = 0 To items.Length - 1 If Not noDupsArrList.Contains(items(i).Trim()) Then noDupsArrList.Add(items(i).Trim()) End If Next Dim uniqueItems As String() = New String(noDupsArrList.Count - 1) {} noDupsArrList.CopyTo(uniqueItems) Return uniqueItems End Function
Dot Net Framework
How to filter uploader control using client side script in asp.net
For any client side action we have to choose a scripting language to build our logic. Let us go for JavaScript. When use a file control we have to use a button control for doing the uploading action. It is better to refer to Anand’s article CodeSnip: Working with FileUpload Control to get the basic idea of using FileUpload control.
Then at the button Client event we have to add some JavaScript action to do the filtering action. We have to use the “OnClientClick” event of a <asp:Button /> control. The code is given below.
Listing 2: OnClientClick
<asp:Button ID="btnUpload" runat="server" OnClick="btnUpload_Click" Text="Upload"
Width="64px" OnClientClick="return CheckForTestFile();" />
Now our objective is to put the filtering logic in CheckForTestFile() JavaScript function. For this action, copy and paste the following code inside your <HEAD> tag of aspx page.
Listing 3: JS Filter function
<script language="javascript">
//Trim the input text
function Trim(input)
{
var lre = /^s*/;
var rre = /s*$/;
input = input.replace(lre, "");
input = input.replace(rre, "");
return input;
}
// filter the files before Uploading for text file only
function CheckForTestFile()
{
var file = document.getElementById('<%=fileDocument.ClientID%>');
var fileName=file.value;
//Checking for file browsed or not
if (Trim(fileName) =='' )
{
alert("Please select a file to upload!!!");
file.focus();
return false;
}
//Setting the extension array for diff. type of text files
var extArray = new Array(".txt", ".doc", ".rtf", ".pdf", ".sxw", ".odt",
".stw", ".html", ".htm", ".sdw", ".vor");
//getting the file name
while (fileName.indexOf("") != -1)
fileName = fileName.slice(fileName.indexOf("") + 1);
//Getting the file extension
var ext = fileName.slice(fileName.indexOf(".")).toLowerCase();
//matching extension with our given extensions.
for (var i = 0; i < extArray.length; i++)
{
if (extArray[i] == ext)
{
return true;
}
}
alert("Please only upload files that end in types: "
+ (extArray.join(" ")) + "nPlease select a new "
+ "file to upload and submit again.");
file.focus();
return false;
}
</script>
Let us go through the codes. The Trim() function would trim the input text. Therefore, in the above code we first check whether there is any file selected in FileUpload control or not. Then we parse the file name with the path to the file-name of the input file using the slice() method of JavaScript which takes the index as input. After getting the file we will still continue parsing to get the file extension out from the File name. Then we iterate a loop to match the input extension with the defeat extensions of our interest stored in an array. If the input extension does not match with any one of the given extension,s we show the alert message and return false as status. This does not allow us to Upload the file and give us a alert message to fetch a file with the given extensions.
reference : http://aspalliance.com/1614_Adding_Filter_Action_to_FileUpload_Control_of_ASPNET_20.1
How to add dynamic meta tags in asp.net
Hi all you can add meta tags like that in page
HtmlMeta _MyName = new HtmlMeta();
_MyName.Name =” Ali Raza”;
_MyName.Content =” just in and test “;
Page.Header.Controls.Add(_MyName);
How to get uploaded image dimensions in asp.net
I used following code to get uploaded image dimensions .
Where flLogoUplaoded is name of asp .net file uploaded control at my application
string UploadedImageType = flLogoUpload.PostedFile.ContentType.ToString().ToLower();
string UploadedImageFileName = flLogoUpload.PostedFile.FileName;
//Create an image object from the uploaded file
System.Drawing.Image UploadedImage = System.Drawing.Image.FromStream(flLogoUpload.PostedFile.InputStream);
//Determine width and height of uploaded image
float UploadedImageWidth = UploadedImage.PhysicalDimension.Width;
float UploadedImageHeight = UploadedImage.PhysicalDimension.Height;
Response.Write( UploadedImageWidth + “<br />”);
Response.Write(UploadedImageHeight + “<br />”);
Saving and Restoring Form Location
A common requirement for a form is to remember its last location. Usually, this information
is stored in the registry. The code that follows shows a helper class that automatically stores
information about a form’s size and position using a key based on the name of a form.
public class FormPositionHelper
{
public static string RegPath = @”SoftwareApp”;
public static void SaveSize(System.Windows.Forms.Form frm)
{
// Create or retrieve a reference to a key where the settings will be stored.
RegistryKey key;
key = Registry.LocalMachine.CreateSubKey(RegPath + frm.Name);
key.SetValue(“Height”, frm.Height);
key.SetValue(“Width”, frm.Width);
key.SetValue(“Left”, frm.Left);
key.SetValue(“Top”, frm.Top);
}
public static void SetSize(System.Windows.Forms.Form frm)
{
RegistryKey key;
key = Registry.LocalMachine.OpenSubKey(RegPath + frm.Name);
if (key != null)
{
frm.Height = (int)key.GetValue(“Height”);
frm.Width = (int)key.GetValue(“Width”);
frm.Left = (int)key.GetValue(“Left”;
frm.Top = (int)key.GetValue(“Top”);
}
}
}
To use this class in a form, you call the SaveSize() method when the form is closing:
private void MyForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
FormPositionHelper.SaveSize(this);
}
and call the SetSize() method when the form is first opened:
private void MyForm_Load(object sender, System.EventArgs e)
{
FormPositionHelper.SetSize(this);
}
How to fix the size of windows form at different monitor resolution
Some time developer/coder have to choose appropriate location of windows form on the screen, But limitation comes with the size and resolution of monitor. The solution is used Screen Class which gives right gives you working area of screen of monitor. Then Form load Event will look like this
private void dynamicSizeForm_Load(System.Object sender, System.EventArgse)
{
Screen scr = Screen.PrimaryScreen;
this.Left = (scr.WorkingArea.Width – this.Width) / 2;
this.Top = (scr.WorkingArea.Height – this.Height) / 2;
}
You can use above code to fix the location and size of windows form when it loads
Screen.PrimaryScreen
Returns a Rectangle structure that represents the bounds
of the display area for the current screen, minus the space
taken for the taskbar and any other docked windows.
Session vs ViewState
Session State is useful for storing values that must be persisted across
multiple pages by the same user. ViewState is useful for storing
serializable data that must be persisisted across PostBacks by a single
page. If you use Session State, the value you insert will remain in memory
until (1) The Session times out, or (2) Your code removes it. If you use
ViewState, the value you insert will remain in ViewState until the user
requests a different page.
ViewState stores data betwen PostBacks by putting it into a hidden form
field on the client HTML doc. when the doc is Posted Back, the values are
read from the hidden form field and stored in memory until the page has
finished processing. If ViewState is particularly large (and I’m talking KBs
here, not 6 bytes), it can negatively affect the speed at which the HTML doc
is downloaded by the browser.
Use the right tool for your job. I think after my explanation, it should be
obvious that you would want to use ViewState in your specific case.
URL Encoding in asp.net
One of way while transferring data from one page to other page is Querystring. But one problem is with Querystring is that many characters are not allowed in url. So we must have to send querystings while take limits in mind because alphanumeric and special characters including $-_.+!*’(),) are allowed. Usually browser does not tolerate special characters in Url, so much data is lost . In asp.net we can use the feature urlEncoding. With Url encoding special characters are replaced by escaped characters sequences starting with the percent sign (%) ,followed by a two-digit hexadecimal .The only exception is space character where character sequence %20 or + sign is used. For this purpose asp.net provide us HttpServerUtility class to encode data.
For example
String CustomerName = “Ali Raza”;
Response.Redirect(“Blogpage.aspx?authorName=” + Server.UrlEncode(CustomerName));
Same time we can Querystring s initial values from Server.UrlDecode() method.
How to make better URI
-
It should be as short as possible. Don’t sacrifice consistency or obviousness, but be brief.
-
Organize and name things logically. ASP.NET isn’t always helpful in keeping a clean structure, so I highly recommend that you use a URL rewriting module. URIs should be ‘hackable’ – see http://www.useit.com/alertbox/990321.html.
-
URIs should be deterministic.
-
No two URIs should ever display the same page
-
The same URI should always display the same content.
-
-
The query string should only contain data that AFFECTS THE QUERY. If it doesn’t describe the content, it doesn’t belong.
-
The URI path should not rely on cryptic or numerical identifiers. If it does, it should also provide a human-readable title. It’s really nice to be able to look at a URL and guess what it contains – especially when you have a long list of them. As a bonus, search engines absolutely love URIs that match keywords. Tip: Don’t try to spam URLs with keywords. Density algorithms are applied here, also. As with page titles, pick exactly 1 keyword and stick with it.
Further reading (written by Tim Berners-Lee): http://www.w3.org/Provider/Style/URI.
Bad examples:
-
/Default.aspx?tabid=3
-
/Products/ShowProduct.aspx?prodid=4982
-
/showblog.aspx?articleid=98
Better examples:
-
/Default.aspx?tabid=3&title=ContactUs
-
/Products/ShowProduct.aspx?id=4982&product=Nokia_Wall_Adpater_12V
-
/showblog.aspx?articleid=98&title= Why_you_should_never_concatenate_SQL_commands
Best:
-
/contact/
-
/products/4982_Nokia_Wall_Adapter_12v
-
/blog/98_Why_you_should_never_concatenate_SQL_commands
Reference
http://www.beansoftware.com/ASP.NET-Tutorials/URI-Design.aspx
How to get relative path for images in asp.net
One common problem developers face while using master page that images did not get proper path, there are many ways to do this. But best way to use ResolveClientUrl . For example :
<img src=”<%= ResolveClientUrl(”images/disco_night.png”)%>” alt=”Disco night” />
after rendering it converted it as
<img src=”../images/disco_night.png” mce_src=”../images/disco_night.png” alt=”Disco night” />
Forum with code
http://sourceforge.net/project/showfiles.php?group_id=154642
How to write word document in asp.net
You can add follwing code at page level function and called in button or page load
function Void GenerateWordDoc()
{
string strDocBody;
try
{
strDocBody = “<html “ + “xmlns:o=’urn:schemas-microsoft-com:office:office’ “ + “xmlns:w=’urn:schemas-microsoft-com:office:word'” + “xmlns=’http://www.w3.org/TR/REC-html40′>” + “<head>” + “<title>Dynamic Generated Document</title>”;
strDocBody = strDocBody + “<!–[if gte mso 9]>” + “<xml>” + “<w:WordDocument>” + “<w:View>Print</w:View>” + “<w:Zoom>100</w:Zoom>” + “<w:DoNotOptimizeForBrowser/>” + “</w:WordDocument>” + “</xml>” + “<![endif]–>”;
strDocBody = strDocBody + “<style> @page” + “{size:8.5in 11.0in; mso-first-footer:ff1; mso-footer: f1; mso-header: h1; border:solid navy 2.25pt; padding:24.0pt 24.0pt 24.0pt 24.0pt;” + ” margin:0.75in 0.50in 0.75in 0.50in ; “ + ” mso-header-margin:.5in; “ + ” mso-footer-margin:.5in; mso-paper-source:0;}” + ” div.Section1″ + ” {page:Section1;}” + “p.MsoFooter, li.MsoFooter, div.MsoFooter{margin:0in; margin-bottom:.0001pt; mso-pagination:widow-orphan; tab-stops:center 3.0in right 6.0in; font-size:12.0pt; font-family:’Arial’;}” + “p.MsoHeader, li.MsoHeader, div.MsoHeader {margin:0in; margin-bottom:.0001pt; mso-pagination:widow-orphan; tab-stops:center 3.0in right 6.0in; font-size:12.0pt; font-family:’Arial’;}” + “–>” + “</style>” + “</head>”;
strDocBody = strDocBody + “<body lang=EN-US style=’tab-interval:.5in’>”;
//Users Content in which he want to show in word doc , in my case i call a function GetData which return string from database
strDocBody += GetData();
strDocBody += “</div> </body> </html> “;
//Force this content to be downloaded as a Word document
Response.AddHeader(“Content-Type”, “application/msword”);
Response.AddHeader(“Content-disposition”, “attachment; filename=mydoc.doc”);
Response.Charset = “”; Response.Write(strDocBody);
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
}
How to get Ip of Url in c#
Here is sample code remember to add system.net namespace
IPHostEntry ip = Dns.GetHostByName (“www.yahoo.com”);
IPAddress [] IpA = ipE.AddressList;
for (int i = 0; i < IpA.Length; i++)
{
Console.WriteLine (“IP Address {0}: {1} “, i, IpA[i].ToString ());
}
How to access detailed information of a visitor in asp.net
In ASP.NET, the Request.ServerVariables collection holds a lot of useful information about the visitor.
For example:
// Getting ip of visitor
string ip = Request.ServerVariables[“REMOTE_ADDR”];
// Getting the page which called the script
string page = Request.ServerVariables[“HTTP_REFERER”];
// Getting Browser Name of Visitor
if (Request.ServerVariables[“HTTP_USER_AGENT”].Contains(“MSIE”))
browser = “Internet Explorer”;
if (Request.ServerVariables[“HTTP_USER_AGENT”].Contains(“FireFox”))
browser = “Fire Fox”;
if (Request.ServerVariables[“HTTP_USER_AGENT”].Contains(“Opera”))
browser = “Opera”;
How to check the value of tag in web config. in c#
Currently i have to work on some console application that reads all web.cong files in specific folder, for example it read the value of <compliation/> tag in c://inetpub where usually all web sites are placed. There are many ways to do it. Read all web.config as xml and read a node, but i did it with the help of System.IO I pasted the code as follow.
using System;
using System.Collections.Generic;
using System.Text;
using System.Web.Configuration;
using System.IO;
namespace WebConfigCheckerTool
{
class Program
{
//The meath where i read the web.config as a simple text file
//strpath take the phyiscal path in specific folder
//Searchstring contains the value of tag which value is search in tag
private static void SearchNode(string strPath, string Searchstring)
{
try
{
StreamReader srConfig = new StreamReader(strPath);
//i required only name of website or sub folder name where web.config locate
string[] FolderName = strPath.Split(”);
string WebSiteName = FolderName[FolderName.Length – 2].ToString();
//Read whole web.config in string and shift it into lower case so case sensitve will not create problem in searching
string strConfig = srConfig.ReadToEnd().ToLower();
//Searching the index of tag of in string using simple string functions.
int _strMain = strConfig.IndexOf(“<“ + Searchstring + “>”);
if (_strMain == -1)
{
//if not found may be tag is in single line for example <compilation //valu=”debug” /> So i search “< compilation
int _Str = strConfig.IndexOf(@”<“ + Searchstring);
// if not found in as both case <compliation /> or <compliation > //<compliation>
if (_Str == -1)
{
Console.WriteLine(WebSiteName + ” at Not Found”);
}
else
{
// if tag in the form of <compilation value=”bug” /> . Then find index of “>” //closing tag
int _Str2 = strConfig.IndexOf(“>”, _Str);
// Find the total length of string containing taqs value
int _strLength = _Str2 – _Str;
Console.Write(” > “ + WebSiteName + ” “);
//write the value of string form starting taq to toal length +1
Console.WriteLine(strConfig.Substring(_Str, _strLength + 1));
Console.WriteLine(“************************************************”);
}
}
if (_strMain != -1)
{
string LastSrting = (“</” + Searchstring + “>”);
int _strlast = strConfig.IndexOf(LastSrting);
int _Str2 = strConfig.IndexOf(“>”, _strlast);
int _str3 = _Str2 – _strlast;
int _strLength = (_strlast – _strMain) + _str3;
Console.Write(” > “ + WebSiteName + ” “);
Console.WriteLine(strConfig.Substring(_strMain, _strLength + 1));
Console.WriteLine(“************************************************”);
}
}
catch (Exception ex)
{
Console.WriteLine(“Not Found”);
}
}
//The method where i write the read the specific directory
public static void DirSearch(string sDir,string SearchString)
{
try
{
foreach (string d in Directory.GetDirectories(sDir))
{
foreach (string f in Directory.GetFiles(d, “Web.config”))
{
SearchNode(f, SearchString);
}
DirSearch(d,SearchString);
}
}
catch (System.Exception excpt)
{
// Console.WriteLine(excpt.Message);
Console.WriteLine(” Directory dot found or drive name is invalid. “);
}
}
static void Main(string[] args)
{
string Check=“Y”;
do
{
Console.WriteLine(“***************************************************************”);
Console.WriteLine(“* *”);
Console.WriteLine(“* *”);
Console.WriteLine(“* *”);
Console.WriteLine(“* Web.Config Checker Tool *”);
Console.WriteLine(“* *”);
Console.WriteLine(“* *”);
Console.WriteLine(“***************************************************************”);
Console.WriteLine(“”);
Console.WriteLine(“”);
Console.WriteLine(“Please Enter the search Word”);
string Searchstring = Console.ReadLine();
Searchstring = Searchstring.ToLower();
Console.WriteLine(“*****************************************************”);
Console.WriteLine(“Please Enter the search Directory Path”);
string DirectoryPath = Console.ReadLine();
//DirSearch(@”C:Inetpubwwwroot”, Searchstring);
DirSearch(DirectoryPath, Searchstring);
Console.WriteLine(“***************************************************************”);
Console.WriteLine(“* *”);
Console.WriteLine(“* *”);
Console.WriteLine(“* *”);
Console.WriteLine(“* Web.Config Checker Tool *”);
Console.WriteLine(“* *”);
Console.WriteLine(“* *”);
Console.WriteLine(“***************************************************************”);
Console.WriteLine(” Do You Want to Search Again, Please Press ‘Y’ or search again “);
Check = Console.ReadLine();
Console.Clear();
}
while (Check == “Y” || Check == “y”);
}
}
}
try it it will help you
How do I find difference between two dates? In C#
DateTime startDate = new DateTime(2005, 2, 1, 3, 4, 12, 56);
// End date
DateTime endDate = new DateTime(2005, 12, 12, 4, 30, 45, 12);
// Time span
TimeSpan diffDate = endDate.Subtract ( startDate );
// Spit it out
Response.Write( “Time Difference: <br/> “);
Response.Write(diffDate.Days.ToString() + ” Days <br/>”);
Response.Write(diffDate.Hours.ToString() + ” Hours <br/>” );
Response.Write(diffDate.Minutes.ToString() + ” Minutes <br/>”);
Response.Write(diffDate.Seconds.ToString() + ” Seconds <br/> “);
Response.Write(diffDate.Milliseconds.ToString() + ” Milliseconds <br/>”);
Ajax Debugging tools for asp.net Developers
There are many bugs comes in JavaScript while working with Ajax extension in asp.net. There are many helping tools for debugging Ajax JavaScript. The best tools I found are Firebug for Firefox and Web Development Helper for Internet Explorer. These tools integrate with
the browser and let you inspect and debug web pages directly in the browser.
You can download Firebug form http://www.getfirebug.com/
You can download web development helper http://projects.nikhilk.net/Projects/WebDevHelper.aspx
Compiler Error Message: CS0030: Cannot convert type ‘ASP.login_aspx’ to ‘System.Web.UI.WebControls.Login’
Problem occur when you page name is same as Class in .net
Usually we develop the login page as login.aspx . When we publish it, the aspx is retained and tries to compile against Login’s codebehind, which is not resolve properly in the assembly due to System.Web.Login.
To avoid it developer must Insure that Page name will not the same as in System.Web.
how to upload larger files in asp.net 2
by default asp.net application did not upload file more than 4.5 mb or 4 mb. For this purpose You have to add following http runtime tag in web.cofig of web site.
<httpRuntime executionTimeout=“90“ maxRequestLength=“20096“useFullyQualifiedRedirectUrl=“false“ minFreeThreads=“8“ minLocalRequestFreeThreads=“4“appRequestQueueLimit=“10000“;/>
you have to change two setting in above code.MaxRequestLength (Here you mention the size limit of file , bydefault it is 4 mb) and appRequestQueueLimit (it is the time when application take time to upload the request.)
how to remove Html tags from string in c#
use this function
public string Strip(string text)
{
return Regex.Replace(text, @”<(.|n)*?>”, string.Empty);
}