Fórmulas e Cenas

Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment;filename=\"FileName.pdf\"");

Response.BinaryWrite(yourPdfAsByteArray);

Response.Flush();

Response.End();     
Source
Enjoy :)

As found in: http://www.personalmicrocosms.com/Pages/dotnettips.aspx?c=15&t=17

 

public static Encoding GetFileEncoding(String FileName)
{
            Encoding Result = null;
            FileInfo FI = new FileInfo(FileName);
            FileStream FS = null;

            try
            {
                FS = FI.OpenRead();
                Encoding[] UnicodeEncodings = { Encoding.BigEndianUnicode, Encoding.Unicode, Encoding.UTF8 };
                for(int i = 0; Result == null && i < UnicodeEncodings.Length; i++)
                {
                    FS.Position = 0;
                    byte[] Preamble = UnicodeEncodings[i].GetPreamble();
                    bool PreamblesAreEqual = true;
                    for(int j = 0; PreamblesAreEqual && j < Preamble.Length; j++)
                    {
                        PreamblesAreEqual = Preamble[j] == FS.ReadByte();
                    }
                    if(PreamblesAreEqual)
                    {
                        Result = UnicodeEncodings[i];
                    }
                }
            }
            catch(System.IO.IOException)
            {
            }
            finally
            {
                if(FS != null)
                {
                    FS.Close();
                }
            }

            if(Result == null)
            {
                Result = Encoding.Default;
            }

            return Result;
        }

 

To use this:

 

 Encoding encode = GetFileEncoding(@"C:\myFile.txt");
 StreamReader re = new StreamReader(@"C:\myFile.txt", encode);

 

 

Enjoy :)

In this category I will post some "creative" solutions to problems. (Code changed to protect the inocents).

 

// The WTF way

int  myInt = Int32.Parse(myDataTable.Rows.Count + "");

// The correct way

int  myInt = myDataTable.Rows.Count;

Directory.CreateDirectory(@"c:\myNonExistingFolder\someNonExistingSubFolder\myFolderTocreate");

 

Enjoy ;)

myComboBox.DataSource = Enum.GetNames(typeof(myEnum));

 

Enjoy ;)

Hello,

If you are reading this you probably have already realized that it is not possible to hide a column that was auto-generated using myGridView.Columns[index].Visible=false;
To achieve this you must:
1 - set the OnRowCreated to execute a function, something like OnRowCreated="gridRowCreated"
2 - Create your function as such:

protected void gridRowCreated(object sender, GridViewRowEventArgs e)
        {
            e.Row.Cells[yourIndexHere].Visible = false;
        }

Hope this helps ;)

public static WebProxy QueryIEProxySettings(string strFileURL)
{
    HttpWebRequest WebReqt = (HttpWebRequest)HttpWebRequest.Create(strFileURL);

    WebProxy WP = new WebProxy(WebReqt.Proxy.GetProxy(new Uri(strFileURL)));
    WP.Credentials = CredentialCache.DefaultCredentials;

    return WP; 

}

This post goes to all of you that are forced to cicle throught several projects on the course of the work day.

It comes handy to expand the recent project list so you don't have to look around.

To do this:
Menu Tool, Options, Environment, General. Inside this change the "items shown in recently used lists" to whatever suits your needs.

:)

A few days ago I got an error report to fix. Some web application that I now maintain was inserting duplicate records.

After a quick look it became obvious that the users where double clicking the submit button and that made the page post twice and so a duplicate record would appear.

A quick fix dor this problem using javascript:

<script language="javascript" type="text/javascript">
        var haveSubmitted=false;
        function FirstSubmitOnly() {
            if (haveSubmitted)
                return false;

            haveSubmitted = true;
            return true;
        }
    </script>


And at the form tag just invoke the function <form id="form1" runat="server" onsubmit="return FirstSubmitOnly();">



Enjoy :)

People keep asking how to cicle every enum term, so here is a post to explain ;)



foreach (OurEnum item in Enum.GetValues(typeof(OurEnum)))
{
      /* Code */
}