如何根据数据库的某些属性值设置gridview内部图片的图片url？

Question

我在 gridview 中有一个图像控件以及其他属性。我想知道如何设置图像 url 属性或如何根据属性值（如客户名称）分配某些静态图像？我想这样做，因为我没有在数据库中存储图像。请指导我该怎么做？我需要使用 gridview 的

RowDataBound

属性吗？

我想尝试这样的事情-

dt = g1.return_dt("select cust_name from tbl_details");
if(dt.Rows.Equals("XYZ"))
{
Set Image Url
}
else if(dt.Rows.Equals("XXX"))
{
Set Image Url
}

Answer 1

表：“tblA”

id     int    identity
name   nvarchar(50)  

ASPX：

<asp:GridView ID="GridView1" runat="server" OnRowDataBound="GridView1_RowDataBound">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:Image ID="Image1" runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
</asp:GridView><br />
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
         ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
        SelectCommand="SELECT * FROM [tblA]">
</asp:SqlDataSource>

背后代码：

protected void Page_Load(object sender, EventArgs e)
{
        //fill gridview
        if( ! IsPostBack )
        {
            GridView1.DataSource = SqlDataSource1;
            GridView1.DataBind();
        }
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
        string name = e.Row.Cells[2].Text;            
        Image img = (Image)e.Row.FindControl("Image1");
        if (img==null)
        {
            return;
        }
        if(name == "XYZ")
        {
            img.ImageUrl = "~/Images/a.jpg";
        }
        else if(name == "XPS")
        {
              img.ImageUrl = "~/Images/b.jpg";
        }
        else
        {
            //default static image
            img.ImageUrl = "~/Images/c.jpg";
        }
}

Answer 2

试试这个

ASPX

<asp:GridView ID="GridView3" runat="server"   
              AllowPaging="True" DataKeyNames="DangerDownstream"
              onpageindexchanging="GridView3_PageIndexChanging" 
              backcolor="White" onrowdatabound="GridView3_RowDataBound"
              PageSize="5" Width="100%" AutoGenerateColumns="False"
              EnableModelValidation="True">
        <RowStyle CssClass="station_grid" />              
        <Columns>
          <asp:BoundField DataField="DangerDownstream" />
             <asp:TemplateField HeaderText="Notification">
                <ItemTemplate>
                  <asp:Image ID="Img" runat="server" Height="25px" Width="25px"/>
                  <asp:Label ID="Ln" runat="server" Text="Label"></asp:Label>
                 </ItemTemplate>
               </asp:TemplateField>
         </Columns>
</asp:GridView>

CS

System.Web.UI.WebControls.Image img = (System.Web.UI.WebControls.Image)e.Row.Cells[2].FindControl("Img"); 
img.ImageUrl = "~/Images/warning2.png";