DataTable行处理

DataTable dt=new DataTable();

新增行：

DataRow addDR= mydatatable.NewRow();
addDR["ID"] = "20";
addDR["Name"] = "Tom";
addDR["Grade"] = "计算机一班";
dt.Rows.Add(addDR);
dt.AcceptChanges();

修改行：

DataColumn[] dtKey = new DataColumn[1];

dtKey[0] = dtFieldUse.Columns["Id"];

dtFieldUse.PrimaryKey = dtKey; //设置tatatable主键

DataRow modDr = dtFieldUse.Rows.Find(colId);

DataRow[] dr = dtFS.Select("ColumnId=" + columnId + " AND FieldId=" + colId);//查询datatable

modDr["FieldUseId"] = dr[0]["Id"];

modDr["Sort"] = dr[0]["Sort"];

modDr["IsShowList"] = dr[0]["IsShowList"];  m

odDr["IsRequired"] = dr[0]["IsRequired"];

modDr["FailureMsg"] = dr[0]["FailureMsg"];

modDr["IsSearch"] = dr[0]["IsSearch"];

dtFieldUse.AcceptChanges();

删除行：

DataColumn[] myPrimaryKey = newDataColumn[1];
myPrimaryKey[0] = mydatatable.Columns["ID"];
dt.PrimaryKey = myPrimaryKey;
DataRow myRemoveRow = dt.Rows.Find("20");
dt.Delete();
dt.AcceptChanges();

查询datatable：

DataRow[] dr = dt.Select("ColumnId=" + columnId + " AND FieldId=" + colId);//查询datatable

编历datatable：

foreach（DataRow dr in dt.Rows）

{

Console.WriteLine("ID="+dr["ID"]);

}