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.NET C# Java Javascript Exception

0
Folgendes ich kann meine bilder in die datenbank schreiben. sie werden in byte[] umgewandelt. Nun möchte ich mir diese Bilder anzeigen lassen in meinem Silverlight Control.
Habt ih mal ein Beispiel wie ich das anstelle.

Gruß

jens79
15.09.2011
Jens79 85 5
1 Antwort
1
eigentlich ganz leicht: google hift ;)
Hier der volle Link und
hier der Code-Snippet
public void GetEmployee(string plastName,string pfirstName)
{
SqlCommand getEmp = new SqlCommand(
"SELECT EmployeeID, Photo "+
"FROM Employees "+
"WHERE LastName = @lastName "+
"AND FirstName = @firstName", _conn);

getEmp.Parameters.Add("@LastName", SqlDbType.NVarChar, 20).Value = plastName;
getEmp.Parameters.Add("@FirstName", SqlDbType.NVarChar, 10).Value = pfirstName;

FileStream fs; // Writes the BLOB to a file (*.bmp).
BinaryWriter bw; // Streams the BLOB to the FileStream object.
int bufferSize = 100; // Size of the BLOB buffer.
byte[] outbyte = new byte[bufferSize]; // The BLOB byte[] buffer to be filled by GetBytes.
long retval; // The bytes returned from GetBytes.
long startIndex = 0; // The starting position in the BLOB output.
string emp_id = ""; // The employee id to use in the file name.

// Open the connection and read data into the DataReader.
_conn.Open();
SqlDataReader myReader = getEmp.ExecuteReader(CommandBehavior.SequentialAccess);

while (myReader.Read())
{
// Get the employee id, which must occur before getting the employee.
emp_id = myReader.GetInt32(0).ToString();

// Create a file to hold the output.
fs = new FileStream("employee" + emp_id + ".bmp",
FileMode.OpenOrCreate, FileAccess.Write);
bw = new BinaryWriter(fs);

// Reset the starting byte for the new BLOB.
startIndex = 0;

// Read the bytes into outbyte[] and retain the number of bytes returned.
retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize);

// Continue reading and writing while there are bytes beyond the size of the buffer.
while (retval == bufferSize)
{
bw.Write(outbyte);
bw.Flush();

// Reposition the start index to the end of the last buffer and fill the buffer.
startIndex += bufferSize;
retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize);
}

// Write the remaining buffer.
bw.Write(outbyte, 0, (int)retval);
bw.Flush();

// Close the output file.
bw.Close();
fs.Close();
}

// Close the reader and the connection.
myReader.Close();
_conn.Close();
}
15.09.2011
daWastl 277 1 7

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