第一個:
如何新建一個datatable,定義列名,並往表里賦值:
DataTable dt1 = new DataTable();
dt1 .Columns.Add("id");
dt1 .Columns.Add("name");
// dt1.Columns.Add("apname", typeof(string));
DataRow NewRow = dt1 .NewRow();
NewRow["id"] =strID1;
NewRow["name"] = strName1;
// Mydt.Rows.Add(NewRow);
第二個:DataView view = new DataView();
view.Table = DataTableA;
view.RowFilter = "itemType = 'book'";//itemType是DataTableA中的一個字段
DataTableB= view.ToTable();
或者:
DataRow[] rows = DataTableA.Select("itemType = 'book'");
DataTableB= DataTableA.Clone();
foreach (DataRow row in rows)
{
DataTableB.ImportRow(row);
}
第三個:
/// 執行DataTable中的查詢返回新的DataTable
/// </summary>
/// <param name="dt">源數據DataTable</param>
/// <param name="condition">查詢條件</param>
/// <returns></returns>
private DataTable GetNewDataTable(DataTable dt, string condition,string sortstr)
{
DataTable newdt = new DataTable();
newdt = dt.Clone();
DataRow[] dr = dt.Select(condition,sortstr);
for (int i = 0; i < dr.Length; i++)
{
newdt.ImportRow((DataRow)dr[i]);
}
return newdt;//返回的查詢結果
}