我有一个数据表，如果所有单元格的值都是“0”，我必须删除所有列。数据表有一个最后一行，称为Total，我应该在其中验证条件。我试过这个功能：
for (int counter = dt.Columns.Count-1; counter > 0; counter--)
{ if (dr[counter]=="0")
{dt.Columns.RemoveAt(counter);}
}
DataTable的架构是：
`DataTable dt = new DataTable（）;
SqlConnection connection = new SqlConnection（System.Web.Configuration.WebConfigurationManager.ConnectionStrings [“bootstrap1”]。ConnectionString）;
connection.Open（）;
string sqlStatement =“选择查询”
SqlCommand sqlCmd = new SqlCommand(sqlStatement, connection);
SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd);
sqlDa.Fill(dt);
if (dt.Rows.Count > 0)
{
//Pivot the Original data from the DataTable by calling the
//method PivotTable and pass the dt as the parameter
DataTable pivotedTable = ArangeData(dt);
GridView1.DataSource = pivotedTable;
GridView1.DataBind();
}
}
}
private DataTable ArangeData(DataTable dt)
{
DataTable newdt = new DataTable();
SqlServerUserStore ss = new SqlServerUserStore();
Televizioni channelslist = ss.GetChannelsList();
DataRow dr = null;
newdt.Columns.Add(new DataColumn("Sectors", typeof(String)));
for (int i = 1; i < channelslist.televizioni.Count + 1; i++)
{
newdt.Columns.Add(new DataColumn(channelslist.televizioni[i - 1], typeof(String)));
}
newdt.Columns.Add(new DataColumn("Total", typeof(String)));
int lastsector = -1;
int shuma = 0;
bool first = true;
for (int i = 0; i < dt.Rows.Count; i++)
{
int sector = Convert.ToInt16(dt.Rows[i][0].ToString());
if (sector != lastsector)
{
if (first)
{
first = false;
}
else
{
dr[channelslist.idtelevizioni.Count + 1] = shuma;
newdt.Rows.Add(dr);
}
lastsector = sector;
dr = newdt.NewRow();
for (int j = 0; j < newdt.Columns.Count; j++)
{
dr[j] = "0";
dr[0] = dt.Rows[i][3];
}
shuma = 0;
shuma += Convert.ToInt16(dt.Rows[i][2].ToString());
dr[merrindeksinNgaIdTelevizioni(Convert.ToInt16(dt.Rows[i][1].ToString()), channelslist) + 1] = dt.Rows[i][2];
}
else
{
dr[merrindeksinNgaIdTelevizioni(Convert.ToInt16(dt.Rows[i][1].ToString()), channelslist) + 1] = dt.Rows[i][2];
shuma += Convert.ToInt32(dt.Rows[i][2].ToString());
}
}
dr[channelslist.idtelevizioni.Count + 1] = shuma;
newdt.Rows.Add(dr);
dr = newdt.NewRow();
dr[0] = "Total";
int shumatore = 0;
for (int i = 1; i < newdt.Columns.Count; i++)
{
shumatore = 0;
for (int j = 0; j < newdt.Rows.Count; j++)
{
shumatore += Convert.ToInt32(newdt.Rows[j][i].ToString());
}
dr[i] = shumatore;
}
newdt.Rows.Add(dr);
return newdt;
`
其中dt是DataTable。但是，它似乎不起作用，所以我无法理解出了什么问题。有人可以帮助我吗？