DataView数据视图实现数据过滤,排序(代码调试通过)

DataView过滤数据行

private void filterButton_Click(object sender, System.EventArgs e)
{//过滤
SqlConnection conn=new SqlConnection();
conn.ConnectionString=ConfigurationSettings.AppSettings["ConnectionString"].ToString();
conn.Open();
string sql="select * from Products";
SqlDataAdapter cmd=new SqlDataAdapter(sql,conn);
ds=new DataSet();
cmd.Fill(ds,"showTable");
DataView dv=ds.Tables["showTable"].DefaultView;
dv.RowFilter="ProductName like /'%"+name.Text+"%/'";
DataGrid1.DataSource=dv;
DataBind();
cmd.Dispose();
conn.Close();
conn.Dispose();
}

DataView多条件过滤

DataView dv=ds.Tables["showTable"].DefaultView;
dv.RowFilter="ProductName like /'%"+name.Text+"%/' and ProductID="+name2.Text+"";
DataGrid1.DataSource=dv;
DataGrid1.DataBind();

DataView过滤状态行

DataView dv2=ds.Tables["showTable"].DefaultView;
dv2.RowStateFilter=DataViewRowState.Deleted;//删除行
DataGrid2.DataSource=dv2;
DataGrid2.DataBind();

DataView dv2=ds.Tables["showTable"].DefaultView;
dv2.RowStateFilter=DataViewRowState.CurrentRows;//目前行
DataGrid2.DataSource=dv2;
DataGrid2.DataBind();

通过状态行可以显示用户所做过的操作，从而决定是否更新数据库数据

DataView排序

SqlConnection conn=new SqlConnection();
conn.ConnectionString=ConfigurationSettings.AppSettings["ConnectionString"].ToString();
conn.Open();
string sql="select * from Products";
SqlDataAdapter cmd=new SqlDataAdapter(sql,conn);
ds=new DataSet();
cmd.Fill(ds,"showTable");
DataView dv=ds.Tables["showTable"].DefaultView;
dv.RowFilter="ProductName like /'%"+name.Text+"%/'";
dv.Sort="SupplierID DESC,ProductName DESC";
DataGrid1.DataSource=dv;
DataGrid1.DataBind();
cmd.Dispose();
conn.Close();
conn.Dispose();
DataGrid排序

private void DataGrid1_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
{//排序
SqlConnection conn=new SqlConnection();
conn.ConnectionString=ConfigurationSettings.AppSettings["ConnectionString"].ToString();
conn.Open();
string sql="select * from Products";
SqlDataAdapter cmd=new SqlDataAdapter(sql,conn);
ds=new DataSet();
cmd.Fill(ds,"showTable");
dv2=ds.Tables["showTable"].DefaultView;
dv2.Sort=e.SortExpression;
DataGrid1.DataSource=dv2;
DataGrid1.DataBind();
}

DataGrid利用DataView过滤,排序(以下代码为网上收集)

DataSet ds = new DataSet();
SqlConnection conn = new SqlConnection("server=localhost;uid=sa;pwd=sa;DataBase=pubs");
SqlDataAdapter ada = new SqlDataAdapter("select * from authors",conn);
conn.Open();
ada.Fill(ds,"a");
conn.Close();
DataView dv = new DataView();
dv.Table = ds.Tables[0];
dv.RowFilter = "au_fname like 'a%'";
dv.Sort = "au_id DESC";
tst.DataSource=dv;
tst.DataBind();