How can I remove a row in Gridview when a column has a null value?

Question

In my GridView I have a few rows with 4 columns. Some of the rows has a null value in 1 column. Example:

-----------------------------------------------------
| Column 1   | Column 2   | Column 3   | Column 4   |
-----------------------------------------------------
| text       | Text       | Text       | Text       |
-----------------------------------------------------
| text       |            | Text       | Text       |
-----------------------------------------------------
| text       | Text       | Text       |            |
-----------------------------------------------------

So in the above example I would like to delete or hide row 2 and row 3.

This is the code I have at the moment:

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>

Page.aspx.cs

DataTable GetData()
    {
        DataTable dt = new DataTable();
        using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["OfficeConnection"].ConnectionString))
        {
            con.Open();
            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 ", con))
            {
                foreach (DataRow row in dt.Rows)
                {
                    bool IsEmpty = false;
                    foreach (object obj in row.ItemArray)
                    {
                        if (String.IsNullOrEmpty(obj.ToString()))
                        {
                            IsEmpty = true;
                        }
                        else
                        {
                            IsEmpty = false;
                        }
                    }
                    if (IsEmpty)
                    {
                        dt.Rows.Remove(row);
                    }
                }
                dt.AcceptChanges();
                SqlDataAdapter adpt = new SqlDataAdapter(cmd);
                adpt.Fill(dt);
            }

        }
        return dt;
    }

But this does not seem to be working.

Thanks

Answer 1

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;
}

Note:- If you want to use same Query...the Prefer this else...

Else use this query....Not Allowing the null value from Database...

  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:'

Answer 2

Why don't you change your query

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

to

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

There is no benefit to select the rows which you don't want to display