所以我的文件上传功能已经工作了一段时间，但突然停止工作，即使我在一个新项目中测试它并恢复到旧版本的代码，问题仍然存在。
下面是我的上传功能的代码。
public void EnsureDirectoriesExist()
{
string currentuser = "admin";
//string currentuser = (string)(Session["uname"]);
// if the \pix directory doesn't exist - create it.
if (!System.IO.Directory.Exists(Server.MapPath(@"~/userimages/" + currentuser + "/displaypicture/")))
{
System.IO.Directory.CreateDirectory(Server.MapPath(@"~/userimages/" + currentuser + "/displaypicture/"));
}
}
protected void uploadbtn_Click(object sender, EventArgs e)
{
string currentuser = "admin";
//string currentuser = (string)(Session["uname"]);
if (FileUpload1.HasFile && Path.GetExtension(FileUpload1.FileName) == ".png")
{
// create posted file
// make sure we have a place for the file in the directory structure
EnsureDirectoriesExist();
String filePath = Server.MapPath(@"~/userimages/" + currentuser + "/displaypicture/" + FileUpload1.FileName);
String filePath2 = ("~/userimages/" + currentuser + "/displaypicture/" + FileUpload1.FileName);
FileUpload1.SaveAs(filePath);
SqlConnection conn = new SqlConnection(WebConfigurationManager.ConnectionStrings["myConnectionString"].ToString());
string mySQL, mySQL2;
mySQL2 = "DELETE FROM displaypicture WHERE username='" + currentuser + "'";
mySQL = "INSERT INTO displaypicture(username,path) VALUES ('" + currentuser + "','" + filePath2 + "')";
conn.Open();
SqlCommand cmdAdd2 = new SqlCommand(mySQL2, conn);
SqlCommand cmdAdd = new SqlCommand(mySQL, conn);
cmdAdd2.ExecuteNonQuery();
cmdAdd.ExecuteNonQuery();
conn.Close();
MessageBox.Show("Upload successful!");
}
else
{
MessageBox.Show("Upload has failed. Please check file format.");
}
}
所以基本上我被带到了 else 函数，因为 if 函数似乎不正确。但是我可以发誓它工作了大约 2 周，然后突然不工作了。我也将 if 函数切换为，
if(currentuser.equals("admin")){
}
测试我的 if else 要求语句是否正确，当我这样做时， if 函数会运行，但是只创建目录但文件没有上传到目录中。