我需要您的帮助。我已经编写了一个代码来更新FormView中的图像。一切正常。但是，当立即从计算机中任何其他位置上载图像时，我单击更新时会收到一条错误消息，提示：找不到文件“ C：\ Program Files \ IIS Express \ FariPassport.jpg”。
这是我的aspx页面：
<tr style="align-content:center">
<%--<th>Passport:
</th>--%>
<td>
<asp:Image ID="imgPicture" runat="server" ImageUrl='<%# Eval("ID","ShowImage.ashx?ID={0}") %>' Width="128px" Height="128px" />
</tr>
</td>
</tr>
<tr>
<td align="center">
<asp:Button ID="Button1" runat="server" Text="Edit" CommandName="Edit" CssClass="btn-danger" Font-Size="Large" Height="30px" Width="82px" />
<%--<asp:LinkButton ID="lnkEdit" runat="server" CommandName="Edit" Text="Edit" CssClass="btn-link" />--%>
</td>
<%--<td align="center">
<asp:LinkButton ID="lnkDelete" runat="server" CommandName="Delete" Text="Delete"
OnClientClick="return confirm('Are you sure to delete it completely?');" />
</td>--%>
<%--<td align="center">
<asp:LinkButton ID="lnkNew" runat="server" CommandName="New" Text="New" />
</td>--%>
</tr>
</table>
</ItemTemplate>
<EditItemTemplate>
<table width="100%" bgcolor="#FFCC00">
<tr>
<th> </th>
<td>
<asp:FileUpload ID="fupEditImage" runat="server" />
<asp:CustomValidator ID="cmvImageType" runat="server" ControlToValidate="fupEditImage"
ErrorMessage="File is invalid!" OnServerValidate="CustomValidator1_ServerValidate"></asp:CustomValidator>
</td>
</tr>
<tr>
<td align="center">
<asp:LinkButton ID="lnkUpdate" runat="server" CommandName="Update" Text="Update" ForeColor="White" />
</td>
<td align="center">
<asp:LinkButton ID="lnkCancel" runat="server" CommandName="Cancel" Text="Cancel"
CausesValidation="False" ForeColor="White" />
</td>
</tr>
</table>
</EditItemTemplate>
<EditRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
<InsertItemTemplate>
<table width="100%">
<tr>
<th>Passport:
</th>
<td>
<asp:FileUpload ID="fupInsertImage" runat="server" />
<asp:CustomValidator ID="cmvImageType" runat="server" ControlToValidate="fupInsertImage"
ErrorMessage="File is invalid!" OnServerValidate="CustomValidator1_ServerValidate"></asp:CustomValidator>
</td>
</tr>
<tr>
<td align="center">
<asp:LinkButton ID="lnkInsert" runat="server" CommandName="Insert" Text="Insert" />
</td>
<td align="center">
<asp:LinkButton ID="lnkInsertCancel" runat="server" CommandName="Cancel" Text="Cancel"
CausesValidation="False" />
</td>
</tr>
</table>
</InsertItemTemplate>
<PagerStyle HorizontalAlign="Center" ForeColor="#8C4510" />
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
</asp:FormView>
<asp:SqlDataSource ID="SqlDSPersonDetails" runat="server" ConnectionString="<%$ ConnectionStrings:NNPC-ChevronScholarshipConnectionString %>" SelectCommand="SELECT [ID], [PassportFileName], [PassportImageType], [Passport] FROM [Candidates] WHERE ([UserId] = @UserId)"
DeleteCommand="DELETE FROM Candidates WHERE (ID = @ID)" InsertCommand="INSERT INTO tb_personInfo(PassportFileName, Passport, PassportImageType) VALUES (@PassportFileName, @Passport, @PassportImageType)"
UpdateCommand="UPDATE Candidates SET PassportImageType = @PassportImageType, Passport = @Passport WHERE (ID = @ID)" OnSelecting="SqlDSPersonDetails_Selecting">
<DeleteParameters>
<asp:Parameter Name="ID" Type="Int32" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="PassportFileName" Type="String" />
<asp:Parameter Name="Passport" DbType="Binary" ConvertEmptyStringToNull="true" />
<asp:Parameter Name="PassportImageType" Type="String" ConvertEmptyStringToNull="true" />
</InsertParameters>
<SelectParameters>
<asp:Parameter Name="UserId" Type="Object" />
</SelectParameters>
<UpdateParameters>
<%--<asp:Parameter Name="PassportFileName" Type="String" />--%>
<asp:Parameter Name="PassportImageType" Type="String" ConvertEmptyStringToNull="true" />
<asp:Parameter Name="Passport" DbType="Binary" ConvertEmptyStringToNull="true" />
<asp:Parameter Name="ID" Type="Int32" />
</UpdateParameters>
</asp:SqlDataSource>
</div>
Below is my line of code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.IO;
using System.Web.Security;
public partial class ORMApp_PassportUpdate : System.Web.UI.Page
{
// Static types of common images for checking.
private static List<string> imgytpes = new List<string>()
{
".BMP",".GIF",".JPG",".PNG"
};
protected void Page_Load(object sender, EventArgs e)
{
}
protected void SqlDSPersonDetails_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
{
// Get a reference to the currently logged on user
MembershipUser currentUser = Membership.GetUser();
// Determine the currently logged on user's UserId value
Guid currentUserId = (Guid)currentUser.ProviderUserKey;
// Assign the currently logged on user's UserId to the @UserId parameter
e.Command.Parameters["@UserId"].Value = currentUserId;
}
protected void fvPersonDetails_ItemInserting(object sender, FormViewInsertEventArgs e)
{
}
protected void fvPersonDetails_ItemUpdating(object sender, FormViewUpdateEventArgs e)
{
CustomValidator cv = fvPersonDetails.FindControl("cmvImageType") as CustomValidator;
cv.Validate();
e.Cancel = !cv.IsValid;
FileUpload fup = (FileUpload)fvPersonDetails.FindControl("fupEditImage");
if (cv.IsValid && fup.PostedFile.FileName.Trim() != "")
{
e.NewValues["Passport"] = File.ReadAllBytes(fup.PostedFile.FileName);
e.NewValues["PassportImageType"] = fup.PostedFile.ContentType;
}
}
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{
if (args.Value != null && args.Value != "")
{
args.IsValid = imgytpes.IndexOf(System.IO.Path.GetExtension(args.Value).ToUpper()) >= 0;
}
}
protected void fvPersonDetails_ItemUpdated(object sender, FormViewUpdatedEventArgs e)
{
}
protected void fvPersonDetails_ItemInserted(object sender, FormViewInsertedEventArgs e)
{
}
protected void fvPersonDetails_ItemDeleted(object sender, FormViewDeletedEventArgs e)
{
}
protected void fvPersonDetails_ItemDeleting(object sender, FormViewDeleteEventArgs e)
{
}
protected void fvPersonDetails_ModeChanging(object sender, FormViewModeEventArgs e)
}
}
答案 0 :(得分：0)
此行尝试将where读取为Web服务器内的本地文件，但由于文件未存储在服务器的文件夹中或路径不存在，因此在某些文件中找不到该文件：
PostedFile您可以从e.NewValues["Passport"] = File.ReadAllBytes(fup.PostedFile.FileName);
的{{1}}属性中读取上传的文件作为PostedFile.InputStream实例，并将其分配给字节数组（假设FileUpload是字节数组）：
Stream此外，您可以使用e.NewValues["Passport"]和var stream = fup.PostedFile.InputStream; // creates the stream
stream.Read(e.NewValues["Passport"], 0, stream.Length);
属性检查上传的文件，而不用检查文件名：
HasFile如果您需要保存上传的文件，请先使用PostedFile.ContentLength，然后使用if (cv.IsValid && fup.HasFile && fup.PostedFile.ContentLength > 0)
{
var stream = fup.PostedFile.InputStream; // creates the stream
stream.Read(e.NewValues["Passport"], 0, stream.Length);
e.NewValues["PassportImageType"] = fup.PostedFile.ContentType;
}
进行读取。
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