Question

我的FTP服务器上有一个文件夹，我想用该文件夹内的内容填充ComboBox。我将如何去做？

string result = string.Empty;

//Request location and server name---------->
FtpWebRequest request = 
    (FtpWebRequest)WebRequest.Create("ftp://*******" +"/" + "Products" + "/");

//Lists directory
request.Method = WebRequestMethods.Ftp.ListDirectory;

// set credentials
request.Credentials = new NetworkCredential("user1","1234");
//initialize response
FtpWebResponse response = (FtpWebResponse)request.GetResponse();

//reader to read response
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
combobox1.Text = FTP_Server();
//data from file.
result = reader.ReadToEnd();
reader.Close();
response.Close();

谢谢！我什至不知道这是否有可能！

Answer 1

按行阅读清单：

FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://example.com/remote/path/");
request.Method = WebRequestMethods.Ftp.ListDirectory;
request.Credentials = new NetworkCredential("username", "password");

comboBox1.BeginUpdate();
try
{
    using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
    using (Stream stream = response.GetResponseStream())
    using (StreamReader reader = new StreamReader(stream))
    {
        while (!reader.EndOfStream)
        {
            comboBox1.Items.Add(reader.ReadLine());
        }
    }
}
finally
{
    comboBox1.EndUpdate();
}

如果有很多条目，将整个列表下载到一个字符串中，然后将其拆分（如另一个答案所建议的那样）可能会非常无效。

Answer 2

在不知道您的响应字符串的确切格式的情况下，我的直觉是分割响应字符串：

string files[] = result.Split("\r\n");

然后遍历各个文件，将它们添加到combobox1的Items：

// Depending on how many items you're adding, you may wish to prevent a repaint until the operation is finished
combobox1.BeginUpdate();
foreach(string file in files)
{
    combobox1.Items.Add(file);
}
combobox1.EndUpdate();

那应该为您解决！ MSDN上也有一些出色的（详尽的）文档，其中通常会包含一些用法示例以帮助您进一步了解：https://msdn.microsoft.com/en-us/library/system.windows.forms.combobox(v=vs.110).aspx#Examples

请注意，如果最终想要显示来自其他FTP响应的信息，则必须像这样首先清除combobox1：combobox1.Items.Clear();

使用来自FTP服务器上目录的文件名填充ComboBox

2 个答案: