C# 当列具有空值时，如何删除Gridview中的行？

在我的

GridView

中，我有几行4列。有些行在1列中有空值。 例如：

因此，在上面的示例中，我想删除或隐藏第2行和第3行

这是我目前掌握的代码：

Page.aspx

<asp:GridView ID="GridView1" runat="server" BackColor="#DEBA84" BorderColor="#DEBA84" 
   BorderStyle="None" BorderWidth="1px" CellPadding="3" CellSpacing="2">
  <FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
  <HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
  <PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
  <RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
  <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
  <SortedAscendingCellStyle BackColor="#FFF1D4" />
  <SortedAscendingHeaderStyle BackColor="#B95C30" />
  <SortedDescendingCellStyle BackColor="#F1E5CE" />
  <SortedDescendingHeaderStyle BackColor="#93451F" />
 </asp:GridView>

但这似乎不起作用

---

谢谢

为什么不更改您的查询

SELECT 
      DisplayName 'Display Name', 
      Replace(PrimaryEmailAddress,'SMTP:', ' ') 'Email Address', 
      Replace(Licenses,'text:', ' ') 'License Type', 
      LastPasswordChangeTimestamp 'Last Password Reset' FROM table 

到

选择不想显示的行没有任何好处

public DataTable GetData()
{
    DataTable dt = new DataTable();

    string constr = ConfigurationManager.ConnectionStrings["OfficeConnection"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT DisplayName 'Display Name', Replace(PrimaryEmailAddress,'SMTP:', ' ') 'Email Address', Replace(Licenses,'text:', ' ') 'License Type', LastPasswordChangeTimestamp 'Last Password Reset' FROM table"))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                using (dt = new DataTable())
                {
                    sda.Fill(dt);
                    for (int i = dt.Rows.Count - 1; i >= 0; i--)
                    {

                        if (dt.Rows[i]["mycolumn"].ToString() == "")
                            dt.Rows[i].Delete();
                    }
                    //You have to specify All the column ....which you want to check  

                    dt.AcceptChanges();

                }
            }
        }
    }
    return dt;
}

注意：-如果您想使用相同的查询…请选择其他查询

否则请使用此查询…不允许数据库中的空值

  SELECT 
      DisplayName AS  'Display Name', 
      PrimaryEmailAddress  AS 'Email Address', 
      Licenses AS  'License Type', 
      LastPasswordChangeTimestamp AS 'Last Password Reset' 
    FROM TableName 
    WHERE
    PrimaryEmailAddress <> 'SMTP:'
    and Licenses <> 'text:'

选择
显示名称为“显示名称”，
PrimaryEmailAddress作为“电子邮件地址”，
作为“许可证类型”的许可证，
LastPasswordChangeTimestamp作为“上次密码重置”
从表名
哪里
主电子邮件地址“SMTP:”
和许可证的文本：'

对不起，您是否在代码末尾填写数据表？在对数据表进行任何更改之前，可能需要先填充数据表。

    SELECT 
      DisplayName 'Display Name', 
      PrimaryEmailAddress 'Email Address', 
      Licenses 'License Type', 
      LastPasswordChangeTimestamp 'Last Password Reset' 
    FROM 
      table 
    WHERE
      PrimaryEmailAddress != 'SMTP:'
      and Licenses != 'text:'

public DataTable GetData()
{
    DataTable dt = new DataTable();

    string constr = ConfigurationManager.ConnectionStrings["OfficeConnection"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT DisplayName 'Display Name', Replace(PrimaryEmailAddress,'SMTP:', ' ') 'Email Address', Replace(Licenses,'text:', ' ') 'License Type', LastPasswordChangeTimestamp 'Last Password Reset' FROM table"))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                using (dt = new DataTable())
                {
                    sda.Fill(dt);
                    for (int i = dt.Rows.Count - 1; i >= 0; i--)
                    {

                        if (dt.Rows[i]["mycolumn"].ToString() == "")
                            dt.Rows[i].Delete();
                    }
                    //You have to specify All the column ....which you want to check  

                    dt.AcceptChanges();

                }
            }
        }
    }
    return dt;
}

  SELECT 
      DisplayName AS  'Display Name', 
      PrimaryEmailAddress  AS 'Email Address', 
      Licenses AS  'License Type', 
      LastPasswordChangeTimestamp AS 'Last Password Reset' 
    FROM TableName 
    WHERE
    PrimaryEmailAddress <> 'SMTP:'
    and Licenses <> 'text:'