ASP.Net C＃DetailsView。我無法從代碼後面寫入單個插入參數

這是一個簡單的DetailsView，用於在數據庫中插入數據。我所有的參數都是以形式設置的。不過，我需要在代碼背後設置其中的一個。此窗體用於使用DetailsVeiw中的FileUpload控件將文件上載到文件系統。但我需要輸入上傳到DB的文件路徑。我怎樣才能做到這一點？在測試代碼時，我發現表單中的參數正在工作，數據被插入到數據庫中，但沒有從後面的代碼中插入。在此先感謝。ASP.Net C＃DetailsView。我無法從代碼後面寫入單個插入參數

的形式：

 <asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateInsertButton="True" AutoGenerateRows="False" DataKeyNames="attachmentID" DataSourceID="SqlDataSource1" DefaultMode="Insert" Height="50px" Width="125px" 
      OnItemInserted="DetailsView1_ItemInserted"> 
      <Fields> 
       <asp:BoundField DataField="attachmentID" HeaderText="attachmentID" InsertVisible="False" ReadOnly="True" SortExpression="attachmentID" /> 
       <asp:BoundField DataField="attachmentTitle" HeaderText="attachmentTitle" SortExpression="attachmentTitle" /> 
       <asp:TemplateField HeaderText="Attach File" SortExpression="FileName"> 
        <InsertItemTemplate> 
         <asp:FileUpload ID="FileUpload1" runat="server" /> 
        </InsertItemTemplate> 
       </asp:TemplateField> 
       <asp:BoundField DataField="attachmentType" HeaderText="attachmentType" SortExpression="attachmentType" /> 
       <asp:BoundField DataField="attachmentDescription" HeaderText="attachmentDescription" SortExpression="attachmentDescription" /> 
       <asp:BoundField DataField="attachmentFile" HeaderText="attachmentFile" SortExpression="attachmentFile" InsertVisible="false"/> 

      </Fields> 
     </asp:DetailsView> 
     <asp:Label ID="StatusLabel" runat="server" Text="Label"></asp:Label> 
     <br /> 

     <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SPMS_DBConnectionString1 %>" 
      InsertCommand="INSERT INTO [Attachment] ([attachmentTitle], [attachmentFile], [attachmentType], [projectID], [attachmentDescription], [attachmentDate]) VALUES (@attachmentTitle, @attachmentFile, @attachmentType, @projectID, @attachmentDescription, GetDate())" 
      ProviderName="<%$ ConnectionStrings:SPMS_DBConnectionString1.ProviderName %>"> 

      <InsertParameters> 
       <asp:Parameter Name="attachmentTitle" Type="String" /> 
       <asp:Parameter Name="attachmentType" Type="String" /> 
       <asp:SessionParameter Name="projectID" SessionField="project" Type="String" /> 
       <asp:Parameter Name="attachmentDescription" Type="String" /> 
       <asp:Parameter Name="attachmentFile" Type="String" /> 
      </InsertParameters> 

     </asp:SqlDataSource> 

    </div> 
</form>

在後面的代碼

：這是代碼不影響參數的行：

SqlDataSource1.InsertParameters["attachmentFile"].DefaultValue = Convert.ToString(MapPath("~/AttachedFiles/") + filename);

守則後面：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.IO; 


public partial class stdDocumentsInsert : System.Web.UI.Page 
{ 

string filename; 
protected void Page_Load(object sender, EventArgs e) 
{ 
    if (!Directory.Exists(Server.MapPath("~/AttachedFiles/"))) 
    { 
     Directory.CreateDirectory(Server.MapPath("~/AttachedFiles/")); 
    } 
} 
protected void DetailsView1_ItemInserted(object sender, DetailsViewInsertedEventArgs e) 
{ 


    FileUpload fu1 = (FileUpload)this.DetailsView1.FindControl("FileUpload1"); 
    //if (fu1 == null) 
    //{ 
    // //e.Cancel = true; 
    // StatusLabel.Text = "Could not find file upload"; 
    //} 
    if (fu1.HasFile) 
    { 
     try 
     { 
      filename = Path.GetFileName(fu1.PostedFile.FileName); 
      fu1.SaveAs(Server.MapPath("~/AttachedFiles/") + filename); 
      StatusLabel.Text = "Upload status: File uploaded!"; 
      SqlDataSource1.InsertParameters["attachmentFile"].DefaultValue = Convert.ToString(MapPath("~/AttachedFiles/") + filename); 
      //SqlDataSource1.insert(); // when i used this it worked but other fields in DB became Null 


     } 
     catch (Exception ex) 
     { 
      StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message; 
     } 

    } 
    else 
    { 
     //e.Cancel = true; 
     StatusLabel.Text = "No file uploaded"; 
     return; 
    } 
} 
}

來源

2013-07-14 Poorya

MSDN從 DetailsView.ItemInserted事件：

「時發生DetailsView控件內的插入按鈕被點擊時，但在插入操作之後」。

因此，您正在設置插入後的值。你的代碼是用於設置插入參數正確，你只需要調用它的DetailsView.ItemInserting事件

來源

2013-07-14 06:25:04

-2

添加到數據庫，然後做自己命名爲TC一個VARBINARY字段中輸入以下：

Protected Sub SqlDataSource1_Inserting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceCommandEventArgs) Handles SqlDataSource1.Inserting 
     Dim FU As New FileUpload 
     FU = DetailsView1.FindControl("fileupload1")  
     Using fs As Stream = FU.PostedFile.InputStream 
      Using br As New BinaryReader(fs) 
       Dim tc As SqlParameter 
       tc = New SqlParameter("@tc", SqlDbType.VarBinary) 
       Dim bytes As Byte() = br.ReadBytes(DirectCast(fs.Length, Long)) 
       tc.Value = bytes 
       e.Command.Parameters.Add(tc) 

      End Using 
     End Using  
    End Sub

來源

2015-08-09 14:53:43 user2969845

ASP.Net C＃DetailsView。我無法從代碼後面寫入單個插入參數

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