C#

public string GetWebPage(string url)
{
    HttpWebRequest webRequest = null;
    HttpWebResponse webResponse = null;
    Stream responseStream = null;
    Encoding encode = null;
    StreamReader webPageStream = null;
    string webPageText = "";

    try
    {
        // Create the web request
        webRequest = (HttpWebRequest)HttpWebRequest.Create(url);
        // Get the response
        webResponse = (HttpWebResponse)webRequest.GetResponse();
        // Get the response stream
        responseStream = webResponse.GetResponseStream();
        // Get the encoding
        encode = Encoding.GetEncoding("utf-8");
        // Read the response and using a StreamReader
        webPageStream = new StreamReader(responseStream, encode);
        webPageText = webPageStream.ReadToEnd();
    }
    catch (Exception e)
    {
        MessageBox.Show("Error : " + e.Message);
    }
    finally
    {
        // free any resources
        if (webPageStream != null)
        {
            webPageStream.Close();
            webPageStream.Dispose();
        }
        if (responseStream != null)
        {
            responseStream.Close();
            responseStream.Dispose();
        }
        if (webResponse != null)
        {
            webResponse.Close();
        }
    }

    // return the page contents
    return webPageText;
}

public static extern uint bbox_table_get(uint parent_id, uint struct_size, bb.DATA[], ref StringBuilder data_name);
bb.DATA[] data = new bb.DATA[count];
bbox_table_get(id, (uint)Marshal.SizeOf(typeof(DATA)), data, ref data_name);

Regards

public static extern uint bbox_table_get(uint parent_id, uint struct_size, DATA []data, char []data_name);

DATA []data = new DATA[count];

bbox_table_get(id, (uint)Marshal.SizeOf(typeof(DATA)), data, data_name);

Kasic Slobodan wrote:

dll fills all data

Kasic Slobodan wrote:

data arent sent to the application

Kasic Slobodan wrote:

Data are sent as constants, accually read-only

Regards

Nader Elshehabi wrote:

Replying to your message won't send me any email notification of your post. If I weren't browsing old posts I wouldn't have noticed that you had this question.

public static extern uint bbox_table_get(uint parent_id, uint struct_size, [MarshalAs(UnmanagedType.SafeArray)] bb.DATA[] data, ref StringBuilder data_name);

Regards

[MarshalAs(UnmanagedType.SafeArray)] did not help

DATA []data = new DATA[count];
data[0].id = 20;
char []data_name = new char[data_size];
data_name[0] = ‘t’;
data_name[1] = ‘e’;
data_name[2] = ‘s’;
data_name[3] = ‘t’;
bbox_table_get(id, (uint)Marshal.SizeOf(typeof(DATA)), data, data_name);


// here is what happens inside the function
// data[0].id is equal to 20
// data_name is equal to "test"
data[0].id = 5;
data_name[0] = ‘b’;
data_name[1] = ‘r’;
data_name[2] = ‘e’;
data_name[3] = ‘s’;
data_name[4] = ‘t’;
// here is what happens inside the function

 

Now when function returns back from dll:

// data[0].id is equal to 20
// data_name is equal to "brest"

public string GetWebFile(string url)
{
    HttpWebRequest webRequest = null;
    HttpWebResponse webResponse = null;
    Stream responseStream = null;
    FileStream fileStream = null;
    string filename = "";

    try
    {
        // Create the web request
        webRequest = (HttpWebRequest)HttpWebRequest.Create(url);
        // Get the response
        webResponse = (HttpWebResponse)webRequest.GetResponse();
        // Get the response stream
        responseStream = webResponse.GetResponseStream();
        // write it to a temporary file in 1000 byte chunks
        filename = Path.GetTempFileName();
        fileStream = new FileStream(filename, FileMode.Append);
        int bytesRead = 0;
        byte[] data = new byte[1000];
        // keep looping until we read nothing
        do
        {
            // read the next 1000 bytes of data
            bytesRead = responseStream.Read(data, 0, 1000);
            // write the data to the file
            fileStream.Write(data, 0, bytesRead);
        }
        while (bytesRead > 0);
    }
    catch (Exception e)
    {
        MessageBox.Show("Error : " + e.Message);
    }
    finally
    {
        // free any resources
        if (fileStream != null)
        {
            fileStream.Close();
            fileStream.Dispose();
        }
        if (responseStream != null)
        {
            responseStream.Close();
            responseStream.Dispose();
        }
        if (webResponse != null)
        {
            webResponse.Close();
        }
    }

    // return the contents
    return filename;
}