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C# implements sample code to determine whether a folder exists and create a folder
C# implements sample code to determine whether a folder exists and create a folder
这篇文章主要介绍了C#实现判断文件夹存在与否并创建文件夹的方法,涉及C#针对文件及目录的判断与创建操作相关技巧,需要的朋友可以参考下
本文实例讲述了C#实现判断文件夹存在与否并创建文件夹的方法。分享给大家供大家参考，具体如下：
protected void Button1_Click(object sender, EventArgs e)
{
if (Directory.Exists(Server.MapPath("~/upimg/hufu")) == false)//如果不存在就创建file文件夹
{
Directory.CreateDirectory(Server.MapPath("~/upimg/hufu"));
}
//Directory.Delete(Server.MapPath("~/upimg/hufu"), true);//删除文件夹以及文件夹中的子目录，文件
//判断文件的存在
if (File.Exists(Server.MapPath("~/upimg/Data.html")))
{
Response.Write("Yes");
//存在文件
}
else
{
Response.Write("No");
//不存在文件
File.Create(MapPath("~/upimg/Data.html"));//创建该文件
}
string name = GetFiles.FileName;//获取已上传文件的名字
string size = GetFiles.PostedFile.ContentLength.ToString();//获取已上传文件的大小
string type = GetFiles.PostedFile.ContentType;//获取已上传文件的MIME
string postfix = name.Substring(name.LastIndexOf(".") + 1);//获取已上传文件的后缀
string ipath = Server.MapPath("upimg") +"\\"+ name;//获取文件的实际路径
string fpath = Server.MapPath("upfile") + "\\" + name;
string dpath = "upimg\\" + name;//判断写入数据库的虚拟路径
ShowPic.Visible = true;//激活
ShowText.Visible = true;//激活
//判断文件格式
if (name == "") {
Response.Write("<script>alert('上传文件不能为空')</script>");
}
else{
if (postfix == "jpg" || postfix == "gif" || postfix == "bmp" || postfix == "png")
{
GetFiles.SaveAs(ipath);
ShowPic.ImageUrl = dpath;
ShowText.Text = "你上传的图片名称是:" + name + "<br>" + "文件大小:" + size + "KB" + "<br>" + "文件类型:" + type + "<br>" + "存放的实际路径为:" + ipath;
}
else
{
ShowPic.Visible = false;//隐藏图片
GetFiles.SaveAs(fpath);//由于不是图片文件,因此转存在upfile这个文件夹
ShowText.Text = "你上传的文件名称是:" + name + "<br>" + "文件大小:" + size + "KB" + "<br>" + "文件类型:" + type + "<br>" + "存放的实际路径为:" + fpath;
}
}
}以上就是C#实现判断文件夹存在与否并创建文件夹的示例代码的内容，更多相关内容请关注PHP中文网（www.php.cn）！
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