asp2.0 GridView OnRowDataBound event

GridView 和 OnRowDataBound事件显示图片, 没什么技术含量, 只是作为自己的一点总结:

前台只需要简单的放一个GridView控件，我做的是一个显示fax历史的一个例子，只要用OnRowDataBound 现实图片，如果需要可以更改现实代码。

 1                                          <asp:GridView ID="faxHistoryList" runat="server" AutoGenerateColumns="False" AllowSorting="True" 
 2                                                 EnableViewState="true"OnRowCommand="faxHistoryList_RowCommand" OnRowDataBound="faxHistoryList_RowDataBound">
 4                                                 <Columns>
 5                                                     <asp:TemplateField>
 6                                                         <HeaderTemplate>
 7                                                             <asp:CheckBox ID="chkAll" runat="server" AutoPostBack="true" OnCheckedChanged="chkAll_CheckedChanged"></asp:CheckBox>
 8                                                          </HeaderTemplate>
 9                                                          <ItemTemplate>
10                                                             <asp:CheckBox ID="chkFax" runat="server" ></asp:CheckBox>
11                                                          </ItemTemplate>
12                                                     </asp:TemplateField>
13                                                     <asp:BoundField HeaderText="Id" DataField="Id" Visible="false"/>
14                                                     <asp:BoundField HeaderText="Status" />
15                                                     <asp:BoundField HeaderText="Number Faxed To" DataField="RecipientFaxNumber" />
16                                                     <asp:BoundField HeaderText="Sender" DataField="SenderName" />
17                                                     <asp:BoundField HeaderText="SenderTo" DataField="RecipientName" />
18                                                     <asp:BoundField HeaderText="Patient" DataField="PatientName" />
19                                                     <asp:BoundField HeaderText="SenderDate" DataField="CreateDateTime" />
20                                                     <asp:TemplateField HeaderText="Preview">
21                                                         <ItemTemplate>
22                                                             <asp:LinkButton ID="Preview" runat="server" CommandName="Preview" Text = "Print/Preview"></asp:LinkButton>
23                                                         </ItemTemplate>
24                                                     </asp:TemplateField>
25                                                 </Columns>
26                                                 <EmptyDataTemplate>  
27                                                   <asp:Localize runat="server" ID="locEmptyResultMessage" Text="There is no record"></asp:Localize>
28                                                 </EmptyDataTemplate>
29                                         </asp:GridView>

后台的OnRowDataBound 如下：

 1 protected void faxHistoryList_RowDataBound(object sender, GridViewRowEventArgs e)
 2         {
 3             if (e.Row.RowType == DataControlRowType.DataRow)
 4             {
 5                 LinkButton lkbPreview = (LinkButton)e.Row.FindControl("Preview");//.Cells[(int)DisplayActionPlan.DisplayActionPlanColumn.deletebutton].Controls[0];
 6                 Fax item = (Fax)e.Row.DataItem;
 7                 lkbPreview.CommandArgument = item.Id.ToString();
 8 
 9                 InterventionContracts.Fax fax = (InterventionContracts.Fax)e.Row.DataItem;
10                 System.Text.StringBuilder sb = new System.Text.StringBuilder();
11                 switch (int.Parse(fax.Status))
12                 {
13                     case 0:
14                         sb.Append("");
15                         sb.Append(" Pending");
16                         break;
17                     case 1:
18                         sb.Append("<img class=\"imgAlignTextBottom imgFormulary\" src=\"/images/arrow_outline.gif\" >");
19                         sb.Append(" In-Progress");
20                         break;
21                     case 2:
22                         sb.Append("<img class=\"imgAlignTextBottom imgFormulary\" src=\"/images/check-done.gif\" >");
23                         sb.Append(" Sent");
24                         break;
25                     case 3:
26                         sb.Append("<img class=\"imgAlignTextBottom imgFormulary\" src=\"/images/alert.gif\" >");
27                         sb.Append(" Support Viewing");
28                         break;
29                 }
30                 e.Row.Cells[2].Text = sb.ToString();
31             }
32         }

我没有在前台绑定第三列的值，而在OnRowDataBound 事件里给他付值，这样可以比较容易实现在前台显示图片。另外通过(object)e.Row.DataItem可以比较容易实现绑定对象的cast.