图片上传功能。

图片上传功能。

//图片上传功能：

1.在设计模式下，加文件上传控件。

//第一个Image控件，如果图片上传后，在该控件中显示，Visible控件的初始值为False，其值在.cs页的Button1_Click函数中被改变。第二个是上传控件，需要在.cs页为Button1按钮控件写个OnClick事件函数。第三个Label控件，显示上传成功与否的显示信息。第四个TextBox控件放的是上传路径，该控件和数据库中存放图片路径的字段绑定。

<tr>

 <td align="right" style="width: 73px; height: 55px;"><span style="font-size: 9pt">图片：</span></td>

 <td colspan="3" bgcolor="#ffffff" style="width: 478px; height: 55px;">

        <asp:Image ID="Image1" runat="server" Height="150px" Visible="False" Width="120px" />&nbsp;<br />

        <asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传" />

        <asp:Label ID="Label1" runat="server" Text="Label" Visible="False"></asp:Label>&nbsp;

        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("ExpertImage") %>'></asp:TextBox>

   </td>   

</tr>                          

 2.在.cs代码页中，需要写如下函数。

       protected void Button1_Click(object sender, EventArgs e)

    {

        if (((FileUpload)FormView1.FindControl("FileUpload1")).HasFile)

            try

            {  

string strFileName;

                DateTime mydatetime = new DateTime();

                mydatetime = DateTime.Now;

                strFileName = mydatetime.Year.ToString() + mydatetime.Month.ToString() + mydatetime.Day.ToString() + mydatetime.Hour.ToString() + mydatetime.Minute.ToString() + mydatetime.Second.ToString();

                string path = HttpContext.Current.Server.MapPath("UploadFile\\");

                ((FileUpload)FormView1.FindControl("FileUpload1")).SaveAs(path + strFileName);

                string strUrl;

                strUrl = HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority);

 

                ((Image)FormView1.FindControl("Image1")).Visible = true;

                ((Image)FormView1.FindControl("Image1")).ImageUrl = "UploadFile\\" + strFileName;

                ((TextBox)FormView1.FindControl("TextBox1")).Text = strUrl + "/jly/manage/UploadFile/" + strFileName;

            }

            catch (Exception ex)

            {

                ((Label)FormView1.FindControl("Label1")).Visible = true;

                ((Label)FormView1.FindControl("Label1")).Text = "错误: " + ex.Message.ToString();

            }

        else

        {

            ((Label)FormView1.FindControl("Label1")).Text = "请选择文件";

        }

}