异常详细信息: System.IO.FileNotFoundException

[wenzi_55]

<%@ Page Language="C#" MasterPageFile="~/Black_page/MasterPage_Back.master" AutoEventWireup="true" CodeFile="图片上传大小事件处理.aspx.cs" Inherits="Black_page_图片上传大小事件处理" Title="无标题页" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<table>
<tr>
<td>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="上传 " onclick="Button1_Click1" />
</td>
</tr>
</table>
</asp:Content>


protected void Button1_Click1(object sender, EventArgs e)
{

string Name = this.FileUpload1.FileName;
string idx = Name.Substring(Name.LastIndexOf(".") + 1);//获取格式名
if (idx == "bmp" || idx == "jpg" || idx == "gif")
{
//string NameQQ = System.DateTime.Now.Ticks.ToString() +"."+ idx;
string lujing = Server.MapPath("tupian\\" + Name);

this.FileUpload1.PostedFile.SaveAs(lujing);

string lujing1 = Server.MapPath("yuantu\\" + Name);

commd.MakeThumbnail(lujing1, lujing);

this.FileUpload1.SaveAs(lujing);

string str = "insert into Table_1(photo_URL,url) values('" + lujing1 + "','" + Name + "')";
SqlConnection con = db.CreatDB();
SqlCommand com = new SqlCommand();
com.Connection = con;
con.Open();
com.CommandText = str;
com.ExecuteNonQuery();
con.Close();
}
else
{
Response.Write("<script>alert('图片格式不正确！')</script>");
}
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="originalImagePath">源图路径（物理路径）</param>
/// <param name="thumbnailPath">缩略图路径（物理路径）</param>
/// <param name="width">缩略图宽度</param>
/// <param name="height">缩略图高度</param>
/// <param name="mode">生成缩略图的方式</param>
public void MakeThumbnail(string originalImagePath, string thumbnailPath)
{
Image originalImage = Image.FromFile(originalImagePath);（在这里报错）

int towidth = 96;
int toheight = 96;

int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;

if (ow>oh)
{

toheight = 73;
}
else
{
towidth=73;
}

//新建一个bmp图片
Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

//新建一个画板
Graphics g = System.Drawing.Graphics.FromImage(bitmap);

//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

//清空画布并以透明背景色填充
g.Clear(Color.Transparent);

//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight),
new Rectangle(x, y, ow, oh),
GraphicsUnit.Pixel);

try
{
//以jpg格式保存缩略图
bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (System.Exception e)
{
throw e;
}
finally
{
originalImage.Dispose();
bitmap.Dispose();
g.Dispose();
}
}

[wenzi_55]

[机器人]

commd.MakeThumbnail(lujing1, lujing);

写反了撒。。。

commd.MakeThumbnail(lujing, lujing1);

方法参数名定义得挺好，局部变量也注意下啊

[wenzi_55]

咋地没人哈。跪求解释啊？？？

[CODE163]

[Quote=引用 2 楼 fangxinggood 的回复:]
commd.MakeThumbnail(lujing1, lujing);

写反了撒。。。

commd.MakeThumbnail(lujing, lujing1);

方法参数名定义得挺好，局部变量也注意下啊
[/Quote]

因为你写反了 所以你要处理的图片没有找到（你要生成缩略图需要一个原图片处理得到缩略图，原图片地址错了所以没找到该图片） 所以抛出异常 FileNotFound 没有发现文件。

[wenzi_55]

出来了，做出来了，是写反了！谢谢大家，辛苦你们了！

[wenzi_55]

还想问下，怎么限定上传图片的大小？代码怎么写?

[wenzi_55]

图片大小不超过1M

[chen_ya_ping]

抛出的异常很清楚了啊，文件没有找到，你确定你上传成功了，而且提供给方法的路径是对的。

[wenzi_55]

修改了路劲，成功了，

string Name = this.FileUpload1.FileName;
string idx = Name.Substring(Name.LastIndexOf(".") + 1);//获取格式名
if (idx == "bmp" || idx == "jpg" || idx == "gif")
{
//string Name = System.DateTime.Now.Ticks.ToString() +"."+ idx;

string lujing1 = Server.MapPath("yuantu\\" + Name);

this.FileUpload1.PostedFile.SaveAs(lujing1);

string lujing = Server.MapPath("tupian\\" + Name);

commd.MakeThumbnail(lujing1, lujing);

string str = "insert into Table_1(photo_URL,url) values('" + lujing1 + "','" + Name + "')";
SqlConnection con = db.CreatDB();
SqlCommand com = new SqlCommand();
com.Connection = con;
con.Open();
com.CommandText = str;
com.ExecuteNonQuery();
con.Close();
}
else
{
Response.Write("<script>alert('图片格式不正确！')</script>");
}