HttpWebRequest.ContentLength Properti

Definisi

Ruang nama:

System.Net

Rakitan:

System.Net.Requests.dll

Sumber:

HttpWebRequest.cs

Mendapatkan atau mengatur Content-length header HTTP.

public:
 virtual property long ContentLength { long get(); void set(long value); };

public override long ContentLength { get; set; }

member this.ContentLength : int64 with get, set

Public Overrides Property ContentLength As Long

Nilai Properti

Int64

Jumlah byte data yang akan dikirim ke sumber daya Internet. Defaultnya adalah -1, yang menunjukkan properti belum diatur dan tidak ada data permintaan untuk dikirim.

Pengecualian

InvalidOperationException

Permintaan telah dimulai dengan memanggil GetRequestStream()metode , , BeginGetRequestStream(AsyncCallback, Object)GetResponse(), atau BeginGetResponse(AsyncCallback, Object) .

ArgumentOutOfRangeException

Nilai baru ContentLength kurang dari 0.

Contoh

Contoh kode berikut mengatur ContentLength properti ke panjang string yang sedang diposting.

// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest->Method = "POST";
Console::WriteLine( "\nPlease enter the data to be posted to the (http://www.contoso.com/codesnippets/next.asp) Uri :" );

// Create a new String* Object* to POST data to the Url.
String^ inputData = Console::ReadLine();

String^ postData = String::Concat( "firstone= ", inputData );
ASCIIEncoding^ encoding = gcnew ASCIIEncoding;
array<Byte>^ byte1 = encoding->GetBytes( postData );

// Set the content type of the data being posted.
myHttpWebRequest->ContentType = "application/x-www-form-urlencoded";

// Set the content length of the String* being posted.
myHttpWebRequest->ContentLength = byte1->Length;

Stream^ newStream = myHttpWebRequest->GetRequestStream();

newStream->Write( byte1, 0, byte1->Length );
Console::WriteLine( "The value of 'ContentLength' property after sending the data is {0}", myHttpWebRequest->ContentLength );

// Close the Stream Object*.
newStream->Close();

// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest.Method = "POST";
Console.WriteLine ("\nPlease enter the data to be posted to the (http://www.contoso.com/codesnippets/next.asp) Uri :");

// Create a new string object to POST data to the Url.
string inputData = Console.ReadLine ();


string postData = "firstone=" + inputData;
ASCIIEncoding encoding = new ASCIIEncoding ();
byte[] byte1 = encoding.GetBytes (postData);

// Set the content type of the data being posted.
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";

// Set the content length of the string being posted.
myHttpWebRequest.ContentLength = byte1.Length;

Stream newStream = myHttpWebRequest.GetRequestStream ();

newStream.Write (byte1, 0, byte1.Length);
Console.WriteLine ("The value of 'ContentLength' property after sending the data is {0}", myHttpWebRequest.ContentLength);

// Close the Stream object.
newStream.Close ();

' Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest.Method = "POST"

Console.WriteLine(ControlChars.Cr + "Please enter the data to be posted to the (http://www.contoso.com/codesnippets/next.asp) Uri :")
' Create a new string object to POST data to the Url.
Dim inputData As String = Console.ReadLine()
Dim postData As String = "firstone" + ChrW(61) + inputData
Dim encoding As New ASCIIEncoding()
Dim byte1 As Byte() = encoding.GetBytes(postData)
' Set the content type of the data being posted.
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded"
' Set the content length of the string being posted.
myHttpWebRequest.ContentLength = byte1.Length
Dim newStream As Stream = myHttpWebRequest.GetRequestStream()
newStream.Write(byte1, 0, byte1.Length)
Console.WriteLine("The value of 'ContentLength' property after sending the data is {0}", myHttpWebRequest.ContentLength)
newStream.Close()

Keterangan

Properti ContentLength berisi nilai yang akan dikirim sebagai Content-length header HTTP dengan permintaan.

Nilai apa pun selain -1 di ContentLength properti menunjukkan bahwa permintaan mengunggah data dan bahwa hanya metode yang mengunggah data yang diizinkan untuk diatur di Method properti .

ContentLength Setelah properti diatur ke nilai, jumlah byte tersebut harus ditulis ke aliran permintaan yang dikembalikan dengan memanggil GetRequestStream metode atau BeginGetRequestStream metode dan EndGetRequestStream .

Catatan

Nilai untuk properti ini disimpan di WebHeaderCollection. Jika WebHeaderCollection diatur, nilai properti akan hilang.