ListView的image列将null值传递给Database

Question

我使用ListView控件和EntityDataSource将图像插入我的数据库。在MemberImage列的InsertItemTemplate Image和FileUpload控件中。插入数据后，image列在数据库中显示为null。

任何正确程序的方法都将受到赞赏。

我的代码段如下所示：

<asp:ListView ID="IndividualListView" runat="server"  DataKeyNames="IndividualId" DataSourceID="IndividualDataSource"  InsertItemPosition="LastItem"

    oniteminserting="IndividualListView_ItemInserting"
    onselectedindexchanged="IndividualListView_SelectedIndexChanged">

    <InsertItemTemplate>     
        <td>   
            <asp:Button ID="InsertButton" runat="server" CommandName="Insert"
                Text="Insert" BorderStyle="Ridge" />

            <asp:Button ID="CancelButton" runat="server" CommandName="Cancel"
                Text="Clear" BorderStyle="Ridge" />    
        </td>
        <td>
            <asp:TextBox ID="IndividualIdTextBox" runat="server"
                Text='<%# Bind("IndividualId") %>' />    
        </td>    
        <td>                              
            <asp:Image ID="Image1" runat="server" ImageUrl='<%# Bind("MemberImage") %>'/><br />

            <asp:FileUpload ID="FileUpload1" runat="server" /><br />

            <asp:Label ID="Label1" runat="server" Text=""></asp:Label>

        </td>

     </InsertItemTemplate>    
 </asp:ListView>

 <asp:EntityDataSource ID="IndividualDataSource" runat="server"    
     ConnectionString="name=SheepGateEntities"    
     DefaultContainerName="SheepGateEntities" EnableDelete="True"  
     EnableInsert="True" EnableUpdate="True" EntitySetName="Individuals"    
     EntityTypeFilter="Individual" Include="Counsellings, Households, Services">    
 </asp:EntityDataSource>

代码隐藏页面如下：

protected void IndividualListView_ItemInserting(object sender, ListViewInsertEventArgs e)
{
    FUpload = (FileUpload)IndividualListView.InsertItem.FindControl("FileUpload1");
    FLabel = (Label)IndividualListView.InsertItem.FindControl("Label1");             

    try
    {                 
        FileUpload img = (FileUpload)FUpload;
        Byte[] imgByte = null;

        if (img.HasFile && img.PostedFile != null)
        {
            //To create a PostedFile

            HttpPostedFile File = FUpload.PostedFile; 
            imgByte = new Byte[File.ContentLength];

            //force the control to load data in array
            File.InputStream.Read(imgByte, 0, File.ContentLength);
        }
        e.Values.Add("MemberImage", FUpload.FileName);

    }
    catch
    {
        FLabel.BackColor.Equals("Red");
        FLabel.Text = "There was an error";
    }
}