我有一个名为Update.aspx的页面,在其中我更新所有值而不是文件名。当我要更新信息时,所有值都从数据库中提取到相应的文本框。但是,如果我在数据库中有abc.jpg
这样的文件名,并且我在没有浏览文件和更新的情况下进入更新页面,则会将其插入为null
。
即使用户没有更新,我如何在数据库中保留相同的文件(即abc.jpg)?
这是我的代码:
string onlyname = string.Empty;
string filename = "";
string path = "";
if (FileUp.HasFile)
{
filename = FileUp.PostedFile.FileName;
path = Server.MapPath("/clients_images/") + FileUp.FileName;
onlyname = path.Substring(path.LastIndexOf("\\") + 1);
FileUp.SaveAs(path);
}
else
{
onlyname = dr["Client_Logo"].ToString().Trim();
}
param[4] = new SqlParameter("@Client_Logo", SqlDbType.VarChar, 200);
param[4].Value = onlyname.ToString().Trim();
cmd.Parameters.Add(param[4]);
ASPX代码:
<table align="center" cellpadding="3" cellspacing="0" border="0" width="638" class="tableborder">
<tr>
<td colspan="2" class="mainbg" align="center" height="13">
<font class="general">Update Client Detail</font></td>
</tr>
<tr>
<td class="general" width="50%" align="right">
<b>Client Name :</b></td>
<td align="left">
<asp:TextBox ID="txtUpdateclientname" Text="" Columns = "30" CssClass="checkbox02" runat="server" onchange="Javascript: return initialCap(this);"></asp:TextBox>
<font class="mandatory">*</font>
</td>
</tr>
<tr>
<td class="general" width="50%" align="right">
<b>Company Name :</b></td>
<td align="left">
<asp:TextBox ID="updatecompanyname" Text="" Columns = "30" CssClass="checkbox02" runat="server" onchange="Javascript: return initialCap(this);"></asp:TextBox>
<font class="mandatory">*</font>
</td>
</tr>
<tr>
<td class="general" width="50%" align="right">
<b>Email :</b></td>
<td align="left">
<asp:TextBox ID="updateemail" Text="" Columns = "30" CssClass="checkbox02" runat="server"></asp:TextBox>
<font class="mandatory">*</font>
</td>
</tr>
<tr>
<td class="general" width="50%" valign="top" align="right">
<b>Logo :</b></td>
<td class="general" width="50%" align="left">
<asp:FileUpload ID="FileUp" runat="server" CssClass="checkbox02" />
<br /> (Height of image should not be more than 67 And Width of image should not be more than 380)
</td>
</tr>
<tr>
<td class="general" width="50%" align="right">
<%--<b><font class="bluetext"><strong> Upload : </strong>--%></td>
<td align="left">
<asp:LinkButton ID="viewImage" Text="View Existing" runat="server" cssClass="general-white" class="link" OnCommand="LinkButton_Command" CommandName="downloadfile" ToolTip="Click to View Existing" Font-Bold="true"></asp:LinkButton>
</td>
</tr>
<tr>
<td class="general" width="50%" align="right" valign="top">
<b>Project Type :</b></td>
<td width="100%" align="left" valign="top" colspan="2">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td align="right" valign="top" colspan="3">
<asp:ListBox ID="LstUserLeft" Width="100%" Autoscroll="false" SelectionMode="Multiple" Height="150" CssClass="checkbox02"
runat="server">
</asp:ListBox>
</td>
</tr>
</table>
</td>
</tr>
<tr>
</tr>
</table>
答案 0 :(得分:0)
您可以使用HiddenField
或ViewState
来存储Client_logo字段(来自数据库)的文件名。
例如。
在检索结果时将值分配给HiddenField1
,
HiddenField1.Value=dr["Client_Logo"].ToString().Trim();
并在更新时
if (FileUp.HasFile)
{
...
}
else
{
onlyname = HiddenField1.Value;
}