Question

如果gridview中的值为空，我有更改gridview颜色的问题。我使用templatefield生成gridview。我使用了这段代码，除了标题之外，它在gridview中全部更改：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //change it according your cell number or find element
        if (e.Row.Cells[0].Text != "")
            e.Row.BackColor = System.Drawing.Color.White;
        else
            e.Row.BackColor = System.Drawing.Color.Red;
    }


}

这是我的后台代码，我指定gridview：

 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" OnRowDataBound="GridView1_RowDataBound" >
   <Columns>
     <asp:TemplateField HeaderText="Request Date">
       <ItemTemplate><%#Eval("request_date")%></ItemTemplate>
         </asp:TemplateField>

     <asp:TemplateField HeaderText="A01">
         <ItemTemplate>
           <%#Eval("prod_line").ToString() == "A01" ? "Job Order:" 
           +Eval("jo_no") +"\n\n\n\n\nQuantity: "
           +Eval("qty")+"\n\n\n\n\nNeed by Date:" 
           +Eval("need_by_date")+"\n\n\n\n\nStatus: "
           +Eval("process_id") : ""  %>
         </ItemTemplate>
    </asp:TemplateField>

    <asp:TemplateField HeaderText="A02">
      <ItemTemplate>
         <%#Eval("prod_line").ToString() == "A02" ?"Job Order: " 
           +Eval("jo_no") +"\n\n\n\n\nQuantity: "
           +Eval("qty")+"\n\n\n\nNeed by Date: "     
           +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A03">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A03" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A04">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A04" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A05">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A05" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A06">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A06" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
      </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A07">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A07" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: "      
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""  %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A08">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A08" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A09">
     <ItemTemplate>
        <%#Eval("prod_line").ToString() == "A09" ? "Job Order: " 
          +Eval("jo_no") +"\n\n\n\n\nQuantity: "
          +Eval("qty")+"\n\n\n\nNeed by Date: " 
          +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A10">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A10" ?"Job Order: "
          +Eval("jo_no") +"\n\n\n\n\nQuantity: "
          +Eval("qty")+"\n\n\n\nNeed by Date: " 
          +Eval("need_by_date")+"\n\n\n\n\nStatus: "
          +Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A11">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A11" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "
         +Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A12">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A12" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "
         +Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A13">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A13" ?"Job Order: "
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "
         +Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A14">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A14" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "
         +Eval("process_id") : ""  %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A15">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A15" ?"Job Order: "
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "
         +Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A16">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A16" ? "Job Order: " 
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "
         +Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A17">
     <ItemTemplate>
       <%#Eval("prod_line").ToString() == "A17" ?"Job Order: "
         +Eval("jo_no") +"\n\n\n\n\nQuantity: "
         +Eval("qty")+"\n\n\n\nNeed by Date: " 
         +Eval("need_by_date")+"\n\n\n\n\nStatus: "
         +Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>

   <asp:TemplateField HeaderText="A18">
     <ItemTemplate>
      <%#Eval("prod_line").ToString() == "A18" ? "Job Order: "
        +Eval("jo_no") +"\n\n\n\n\nQuantity: "
        +Eval("qty")+"\n\n\n\nNeed by Date: " 
        +Eval("need_by_date")+"\n\n\n\n\nStatus: "+Eval("process_id") : ""   %>
     </ItemTemplate>
   </asp:TemplateField>
  </Columns>
</asp:GridView>

我得到了这样的输出：

但我希望输出如下：

Answer 1

查看代码的这一部分，您将找到问题

 if (e.Row.Cells[0].Text != "")
        e.Row.BackColor = System.Drawing.Color.White;
    else
        e.Row.BackColor = System.Drawing.Color.Red;

如果单元格为空，则设置整行 [e.Row.BackColor] 的背景颜色
在行中设置单元格的颜色
像这样

e.Row.Cells[0].BackColor = System.Drawing.Color.Red;

你可以用它来应用你的逻辑（无论你想要哪个颜色）

Answer 2

据我了解这个问题，您的单元格没有任何价值，但如果您通过放置断点在RowDataBound事件处理程序中看到它，您可能会看到像 这样的值而不是空字符串。

您只需要在RowDataBound内稍微修改您的条件，如下所示：

if (string.IsNullOrEmpty(Server.HtmlDecode(e.Row.Cells[1].Text).Trim()))
      e.Row.BackColor = System.Drawing.Color.Red;

单元格中的值为htmlEncoded。您需要使用Server.HtmlDecode对其进行解码，之后您的值为" "字符串，其中包含一个空格，这就是我使用Trim()的原因，最后检查该值是否为null or empty

这是经过测试的解决方案，它可以正常工作。

如果值为空，则更改gridview背景颜色

2 个答案: