如何在gridview控件中显示空数据行

Question

这里我使用gridview这里是gidview绑定

conn = new SqlConnection(strconnection);
string squery = "sql query";

da = new SqlDataAdapter(squery, conn);
ds = new DataSet();
da.Fill(ds, "tbl1");

GridView1.DataSource = ds;
GridView1.DataBind();

这是gridview控件的asp代码

<asp:GridView ID="GridView1" runat="server" GridLines="None" 
     HeaderStyle-CssClass="grid_header" 
     RowStyle-CssClass="grid_item" 
     RowStyle-Height="30px"  
     AutoGenerateColumns="false" Width="775px" EmptyDataText="Empty">
   <Columns>
      <asp:BoundField HeaderText="Order Code" DataField="ordercode" 
           HeaderStyle-HorizontalAlign="Left" 
           ItemStyle-HorizontalAlign="Left"  />
      <asp:BoundField HeaderText="Transation Code" DataField="transcode"  
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
      <asp:BoundField HeaderText="Plan Name" DataField="product" 
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
      <asp:BoundField HeaderText="Plan Started" DataField="Start_d" 
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
      <asp:BoundField HeaderText="Plan Ending" DataField="End_d" 
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
      <asp:CheckBoxField HeaderText="Payed" DataField="Payed" 
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
      <asp:BoundField HeaderText="Pay Date" DataField="PayDate" 
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
      <asp:BoundField HeaderText="Payed Amt" DataField="amtpaid" 
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
      <asp:BoundField HeaderText="Pay Amt" DataField="PayAmount" 
           HeaderStyle-HorizontalAlign="Center" 
           ItemStyle-HorizontalAlign="Center" />
   </Columns>
</asp:GridView>

这就是这样的结果

 Header1 header2 header3 header4 
     1       asdas   22sdas  asdasda
     2       sasa             asdasas
     3       asdas  
     4                         asdasas

喜欢这个结果

这里我的问题是我想显示NULL的地方只显示"EMPTY"消息.我怎样才能做到这一点？

Answer 1

您可以使用NullDisplayText="EMPTY" NullDisplayText属性

<asp:BoundField DataField="transcode"
        NullDisplayText="EMPTY"
        HeaderText="header2"/>

如果来自您的数据库的内容不是NULL空字符串,则需要使用模板字段

<asp:TemplateField HeaderText="header2">
<ItemTemplate>
    <%# Eval("transcode").ToString() == "" ? "EMPTY" : Eval("transcode").ToString() %>
</ItemTemplate>
</asp:TemplateField>