Question

我的asp.net应用程序中有一个gridview。例如

SN名称日期行动

1个按钮（做某事）

这只是我的gridview行中的一行。我希望每行都有一个空单元格，该行的按钮字段单元格应显示。如果该行中没有空单元格，则该按钮应隐藏。我的代码得到的是所有可见的按钮都变为假，我不想要。

这是我背后的代码

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" Height="326px" OnPageIndexChanging="GridView1_PageIndexChanging" PageSize="5" style="text-align: left; margin-left: 169px" Width="1069px" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" OnRowDataBound="GridView1_RowDataBound" AutoGenerateColumns="False" OnRowCommand="GridView1_RowCommand" OnRowEditing="GridView1_RowEditing">                       
<Columns>
  <asp:BoundField HeaderText="S/N" DataField="SN" />
  <asp:BoundField HeaderText="First Name" DataField="FirstName" />
  <asp:BoundField HeaderText="Address" DataField="Address" />
  <asp:BoundField HeaderText="Phone Number" DataField="PhoneNumber" />
  <asp:BoundField HeaderText="Sex" DataField="Sex" />
  <asp:BoundField HeaderText="Reason" DataField="Reason" />
  <asp:BoundField HeaderText="SignIn" DataField="SignIn_Time" />
  <asp:BoundField HeaderText="SignOut" DataField="Signout_Time" />

<asp:TemplateField HeaderText="Action" Visible="True">
   <ItemTemplate>
      <asp:Button ID="out" runat="server" Text="Sign out" CommandName="SignOut"  CommandArgument='<%# Eval("SN") %>' CssClass="active"/>
   </ItemTemplate>
</asp:TemplateField>

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
  if (e.Row.RowType == DataControlRowType.DataRow)
  {
    for (int i =0 ; i < e.Row.Cells.Count; i ++)
    {
      if (e.Row.Cells[i].Text == "&nbsp;")
      {
        Button status = (Button)e.Row.FindControl("out");
        status.Visible = true;
      }
      else
      {
        Button status = (Button)e.Row.FindControl("out");
        status.Visible = false;
      }
    }
  }  
}

Answer 1

尝试使用此代码

string.IsNullOrEmpty(e.Row.Cells[i].Text)

或

e.Row.Cells[i].Text.Equals(" ")

Answer 2

您正在做的是检查整个网格中的所有单元格。解决方法是检查每个RowDataBound事件中的所有单元格。

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        var status = (Button) e.Row.FindControl("out");
        // Show button if at least one cell is empty.
        status.Visible = e.Row.Cells.Cast<TableCell>()
            .Any(cell => string.IsNullOrEmpty(cell.Text));
    }
}

通常，数据库不应该为空数据返回 ，除非您有意将它们存储在数据库中。

如果行包含空单元格，如何在gridview中显示和隐藏按钮字段

2 个答案: