我有一个放置在UpdatePanel中的图像。我在button_click事件中将它设置为ImageUrl。图像位于App_Data/imagesDirectory中。为什么网页上没有显示图像?在它为什么图像在UpdatePanel中时不显示?
<asp:Panel ID="Panel1" runat="server" style="direction: ltr">
<asp:ListBox ID="photosListBox" runat="server" Rows="1"></asp:ListBox>
<asp:Button ID="selectButton" runat="server" Text="select"
onclick="selectButton_Click" />
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<br />
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<asp:Image ID="ph" runat="server" />
<br />
<br />
<asp:Button ID="submit" runat="server" onclick="submit_Click"
Text="submit" />
<br />
<br />
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
我只是设置ImageUrl属性是相关的图像control.however,按钮代码:
UpdatePanel2.Visible = true;
submit.Visible = true;
photosListBox.Visible = false;
selectButton.Visible = false;
Users sentUser = (Users)Session["user"];
Gallery sentGallery = (Gallery)Session["gallery"];
string selectedName = photosListBox.SelectedItem.ToString();
int selectedId = Convert.ToInt32(photosListBox.SelectedItem.Value);
ModelContainer ml = new ModelContainer();
Users u = ml.UsersSet.Where(t => t.Username == sentUser.Username).First();
Gallery g = u.Gallery.Where(t => t.Name == sentGallery.Name && t.Id == sentGallery.Id).First();
Photo p = g.Photo.Where(t => t.Name == selectedName && t.Id == selectedId).First();
ph.ImageUrl = MapPath(p.PhotoAdd);
nameTextBox.Text = p.Name;
descriptionTextBox.Text = p.Description;
uploadDateTimeLabel.Text = p.UploadDateTime.ToString();
我还设置的ImageUrl属性在page.but的PreRender事件是NT工作:
protected void Page_PreRender(object sender, EventArgs e)
{
ph.ImageUrl = imageU;
}
imageU是网页类的受保护领域
向我们显示按钮代码。 – Adil 2012-08-06 15:17:49
你调试了你的代码吗?事情在哪个阶段出现错误? – Curt 2012-08-06 15:36:32
检查声明ph.ImageUrl中分配的URL,并将该URL放入浏览器以验证它是否正确? – Adil 2012-08-06 15:39:01