這裏很難展示ASP.NET的代碼,所以我會盡我所能來描述我的問題。ASP.NET網頁不可用
我有一個FileUploadControl和一個按鈕,當它被點擊時調用一個函數。當沒有爲我的FileUploadControl選擇任何內容時,Button函數似乎工作。但是,當FileUploadControl中選擇了某些內容(我選擇了要上傳的文件)時,單擊該按鈕時出現問題。它的功能完全沒有關係(它可能只是寫入標籤,即使它與FileUploadControl無關)。我得到的錯誤是:
此網頁不可用。
http://localhost:2134/UploadMedia/Default.aspx的網頁可能會暫時關閉,或者它可能已永久移動到新的網址。
我在Google上搜索過,人們似乎遇到了這個問題,但是與我不同的原因。他們說他們的ASP.NET Development Server端口實際上與他們在地址欄中的端口不同。對我來說情況並非如此。
另外,人們遇到的另一個問題是Use Dynamic Ports
。我試過true
和false
。我也嘗試過不同的端口,而且我總是得到同樣的錯誤。
這真的讓我發瘋,因爲buttonFunction中的代碼並不重要,只要FileUploadControl中有某些東西,它就不起作用。如果什麼都沒有,它似乎工作得很好。
下面是ASP.NET控件的代碼:
<asp:FileUpload id="FileUploadControl" runat="server" />
<asp:Button runat="server" id="UploadButton" text="Upload" OnClick="uploadClicked" />
<br /><br />
<asp:Label runat="server" id="StatusLabel" text="Upload status: " />
這是該按鈕的功能代碼:
protected void uploadClicked(object sender, EventArgs e)
{
if (FileUploadControl.HasFile)
{
string filename = Path.GetFileName(FileUploadControl.FileName);
//Check if the entered username already exists in the database.
String sqlDupStmt = "Select songPath from Songs where songPath ='" + Server.MapPath("~/Uploads/") + filename + "'";
SqlConnection sqlDupConn = new SqlConnection(@"Data Source = .\SQLEXPRESS; AttachDbFilename = |DataDirectory|\Database.mdf; Integrated Security = True; User Instance = True;");
SqlCommand sqlDupCmd = new SqlCommand(sqlDupStmt, sqlDupConn);
sqlDupCmd.Connection.Open();
SqlDataReader sqlDupReader = sqlDupCmd.ExecuteReader(CommandBehavior.CloseConnection);
if (sqlDupReader.Read())
{
StatusLabel.Text = "Upload status: The file already exists.";
sqlDupReader.Close();
}
else
{
sqlDupReader.Close();
//See "How To Use DPAPI (Machine Store) from ASP.NET" for information about securely storing connection strings.
String sqlStmt = "Insert into Songs values (@songpath);";
SqlConnection sqlConn = new SqlConnection(@"Data Source = .\SQLEXPRESS; AttachDbFilename = |DataDirectory|\Database.mdf; Integrated Security = True; User Instance = True; uid=sa; pwd=password;");
SqlCommand cmd = new SqlCommand(sqlStmt, sqlConn);
SqlParameter sqlParam = null;
//Usage of Sql parameters also helps avoid SQL Injection attacks.
sqlParam = cmd.Parameters.Add("@userName", SqlDbType.VarChar, 150);
sqlParam.Value = Server.MapPath("~/Uploads/") + filename;
//Attempt to add the song to the database.
try
{
sqlConn.Open();
cmd.ExecuteNonQuery();
FileUploadControl.SaveAs(Server.MapPath("~/Uploads/") + filename);
songList.Items.Add(filename);
StatusLabel.Text = "Upload status: File uploaded!";
}
catch (Exception ex)
{
StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message;
}
finally
{
sqlConn.Close();
}
}
}
}
但這buttonfunction提供了相同的結果:
protected void uploadClicked(object sender, EventArgs e)
{
StatusLabel.Text = "FooBar";
}
有沒有人有過這個問題,或者可能知道原因是什麼?
謝謝!
不知道爲什麼它只是給我一個網頁不可用的錯誤,而不是告訴我有什麼問題。 – hahuang65 2010-04-05 19:26:17