Filter Dataset without hiting database using Dataview.

DataSet ds = (DataSet)ViewState[“dsChannel”];// get your dataset
DataView dv = ds.Tables[0].DefaultView;

dv.RowFilter = “ChannelId in (” + channelId + “)”; //  filter string

return  dv.table // it return  filtered row(s)  from dataset

If  you want to selcet single value from  returned datarow

string str= dv[0][“ChannelCode”].ToString()