下面的代码示例演示如何创建 FileUpload 控件，该控件将文件保存到代码中指定的路径。调用 SaveAs 方法将文件保存到服务器上的指定路径。Visual Basic 复制代码 <%@ Page Language="VB" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server">
Sub UploadButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
' Specify the path on the server to ' save the uploaded file to. Dim savePath As String = "c:\temp\uploads\"
' Before attempting to perform operations ' on the file, verify that the FileUpload ' control contains a file. If (FileUpload1.HasFile) Then ' Get the name of the file to upload. Dim fileName As String = FileUpload1.FileName
' Append the name of the file to upload to the path. savePath += fileName
' Call the SaveAs method to save the ' uploaded file to the specified path. ' This example does not perform all ' the necessary error checking. ' If a file with the same name ' already exists in the specified path, ' the uploaded file overwrites it. FileUpload1.SaveAs(savePath)
' Notify the user of the name the file ' was saved under. UploadStatusLabel.Text = "Your file was saved as " & fileName
Else ' Notify the user that a file was not uploaded. UploadStatusLabel.Text = "You did not specify a file to upload." End If End Sub
</script><html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>FileUpload Example</title> </head> <body> <form id="form1" runat="server"> <div> <h4>Select a file to upload:</h4>
<asp:Label id="UploadStatusLabel" runat="server"> </asp:Label> </div> </form> </body> </html> C# 复制代码 <%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> protected void UploadButton_Click(object sender, EventArgs e) { // Specify the path on the server to // save the uploaded file to. String savePath = @"c:\temp\uploads\";
// Before attempting to perform operations // on the file, verify that the FileUpload // control contains a file. if (FileUpload1.HasFile) { // Get the name of the file to upload. String fileName = FileUpload1.FileName;
// Append the name of the file to upload to the path. savePath += fileName; // Call the SaveAs method to save the // uploaded file to the specified path. // This example does not perform all // the necessary error checking. // If a file with the same name // already exists in the specified path, // the uploaded file overwrites it. FileUpload1.SaveAs(savePath);
// Notify the user of the name of the file // was saved under. UploadStatusLabel.Text = "Your file was saved as " + fileName; } else { // Notify the user that a file was not uploaded. UploadStatusLabel.Text = "You did not specify a file to upload."; } } </script><html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>FileUpload Example</title> </head> <body> <form id="form1" runat="server"> <div> <h4>Select a file to upload:</h4>
<asp:Label id="UploadStatusLabel" runat="server"> </asp:Label> </div> </form> </body> </html> 下面的代码示例演示如何创建 FileUpload 控件，该控件将文件保存到文件系统中针对应用程序的指定目录。使用 HttpRequest.PhysicalApplicationPath 属性来获取当前正在执行的服务器应用程序的根目录的物理文件系统路径。调用 SaveAs 方法将文件保存到服务器上的指定路径。 Visual Basic 复制代码 <%@ Page Language="VB" %><html> <head> <script runat="server"> Sub UploadButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
' Save the uploaded file to an "Uploads" directory ' that already exists in the file system of the ' currently executing ASP.NET application. ' Creating an "Uploads" directory isolates uploaded ' files in a separate directory. This helps prevent ' users from overwriting existing application files by ' uploading files with names like "Web.config". Dim saveDir As String = "\Uploads\"
' Get the physical file system path for the currently ' executing application. Dim appPath As String = Request.PhysicalApplicationPath
' Before attempting to save the file, verify ' that the FileUpload control contains a file. If (FileUpload1.HasFile) Then Dim savePath As String = appPath + saveDir + FileUpload1.FileName
' Call the SaveAs method to save the ' uploaded file to the specified path. ' This example does not perform all ' the necessary error checking. ' If a file with the same name ' already exists in the specified path, ' the uploaded file overwrites it. FileUpload1.SaveAs(savePath)
' Notify the user that the file was uploaded successfully. UploadStatusLabel.Text = "Your file was uploaded successfully." Else ' Notify the user that a file was not uploaded. UploadStatusLabel.Text = "You did not specify a file to upload." End If End Sub
</script></head> <body> <h3>FileUpload Class Example: Save To Application Directory</h3> <form ID="Form1" runat="server">
<%@ Page Language="VB" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server">
Sub UploadButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
' Specify the path on the server to
' save the uploaded file to.
Dim savePath As String = "c:\temp\uploads\"
' Before attempting to perform operations
' on the file, verify that the FileUpload
' control contains a file.
If (FileUpload1.HasFile) Then
' Get the name of the file to upload.
Dim fileName As String = FileUpload1.FileName
' Append the name of the file to upload to the path.
savePath += fileName
' Call the SaveAs method to save the
' uploaded file to the specified path.
' This example does not perform all
' the necessary error checking.
' If a file with the same name
' already exists in the specified path,
' the uploaded file overwrites it.
FileUpload1.SaveAs(savePath)
' Notify the user of the name the file
' was saved under.
UploadStatusLabel.Text = "Your file was saved as " & fileName
Else
' Notify the user that a file was not uploaded.
UploadStatusLabel.Text = "You did not specify a file to upload."
End If End Sub
</script><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FileUpload Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h4>Select a file to upload:</h4>
<asp:FileUpload id="FileUpload1"
runat="server">
</asp:FileUpload>
<br /><br />
<asp:Button id="UploadButton"
Text="Upload file"
OnClick="UploadButton_Click"
runat="server">
</asp:Button>
<hr />
<asp:Label id="UploadStatusLabel"
runat="server">
</asp:Label>
</div>
</form>
</body>
</html>
C# 复制代码
<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> protected void UploadButton_Click(object sender, EventArgs e)
{
// Specify the path on the server to
// save the uploaded file to.
String savePath = @"c:\temp\uploads\";
// Before attempting to perform operations
// on the file, verify that the FileUpload
// control contains a file.
if (FileUpload1.HasFile)
{
// Get the name of the file to upload.
String fileName = FileUpload1.FileName;
// Append the name of the file to upload to the path.
savePath += fileName;
// Call the SaveAs method to save the
// uploaded file to the specified path.
// This example does not perform all
// the necessary error checking.
// If a file with the same name
// already exists in the specified path,
// the uploaded file overwrites it.
FileUpload1.SaveAs(savePath);
// Notify the user of the name of the file
// was saved under.
UploadStatusLabel.Text = "Your file was saved as " + fileName;
}
else
{
// Notify the user that a file was not uploaded.
UploadStatusLabel.Text = "You did not specify a file to upload.";
} }
</script><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>FileUpload Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h4>Select a file to upload:</h4>
<asp:FileUpload id="FileUpload1"
runat="server">
</asp:FileUpload>
<br /><br />
<asp:Button id="UploadButton"
Text="Upload file"
OnClick="UploadButton_Click"
runat="server">
</asp:Button>
<hr />
<asp:Label id="UploadStatusLabel"
runat="server">
</asp:Label>
</div>
</form>
</body>
</html> 下面的代码示例演示如何创建 FileUpload 控件，该控件将文件保存到文件系统中针对应用程序的指定目录。使用 HttpRequest.PhysicalApplicationPath 属性来获取当前正在执行的服务器应用程序的根目录的物理文件系统路径。调用 SaveAs 方法将文件保存到服务器上的指定路径。 Visual Basic 复制代码
<%@ Page Language="VB" %><html>
<head> <script runat="server">
Sub UploadButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
' Save the uploaded file to an "Uploads" directory
' that already exists in the file system of the
' currently executing ASP.NET application.
' Creating an "Uploads" directory isolates uploaded
' files in a separate directory. This helps prevent
' users from overwriting existing application files by
' uploading files with names like "Web.config".
Dim saveDir As String = "\Uploads\"
' Get the physical file system path for the currently
' executing application.
Dim appPath As String = Request.PhysicalApplicationPath
' Before attempting to save the file, verify
' that the FileUpload control contains a file.
If (FileUpload1.HasFile) Then
Dim savePath As String = appPath + saveDir + FileUpload1.FileName
' Call the SaveAs method to save the
' uploaded file to the specified path.
' This example does not perform all
' the necessary error checking.
' If a file with the same name
' already exists in the specified path,
' the uploaded file overwrites it.
FileUpload1.SaveAs(savePath)
' Notify the user that the file was uploaded successfully.
UploadStatusLabel.Text = "Your file was uploaded successfully." Else
' Notify the user that a file was not uploaded.
UploadStatusLabel.Text = "You did not specify a file to upload."
End If End Sub
</script></head>
<body> <h3>FileUpload Class Example: Save To Application Directory</h3> <form ID="Form1" runat="server">
<h4>Select a file to upload:</h4>
<asp:FileUpload id="FileUpload1"
runat="server">
</asp:FileUpload>
<br><br>
<asp:Button id="UploadButton"
Text="Upload file"
OnClick="UploadButton_Click"
runat="server">
</asp:Button>
<hr />
<asp:Label id="UploadStatusLabel"
runat="server">
</asp:Label>
</form></body>
</html>
private void btnUpLoad_Click(object sender,System.EventArgs e)
{ string fullFileName=this.File1.PostedFile.FileName;//File1是上传控件的ID
string fileName=fullFileName.Substring(fullFileName.LastIndexOf("\\")+1);//表示你要上传的文件名与客户端的文件名重名，此间调用了Substring方法，表明你取得的是fullFileName中全路径中的实际文件名，ex.fullFileName==c:\pictures\myalum.jpg
则经过转换fileName==myalum.jpg
string type=fullFileName.Substring(fullFileName.LastIndexOf(".")+1);
if(type=="jpg"||type="bmp"||type=="gif")
{ this.File1.PostedFile.SaveAS(Server.MapPath("up")+"\\"+fileName);//存储上传图片到服务器端的路径中
else
{Response.Write("<script language='javascript'>alert(您上传的图片格式不对) </script>")}
图片上传(水印、缩略图、远程保存)源码