DataTable的增刪改查

1、向DataTable中添加新行

DataRow dr = dataTable.NewRow();
dr["columnName1"] = value1;
dr["columnName2"]="value2";
dr["columnName3"] = "value3";
dataTable.Rows.Add(dr);

2、去除DataTable中的重復(fù)行，并將其中一列的數(shù)值相加

for (int i = 0; i < dt_1.Rows.Count; i++)
{
string tempCode = dt_1.Rows[i]["Code"].ToString();
for (int j = i + 1; j < dt_1.Rows.Count; j++)
{
if (tempCode == dt_1.Rows[j]["Code"].ToString())
{
dt_1.Rows[i]["Number"] = int.Parse(dt_1.Rows[i]["Number"].ToString()) + int.Parse(dt_1.Rows[j]["Number"].ToString());
dt_1.Rows.RemoveAt(j);
j = j - 1;
}
}
}

3、修改DataTable中的數(shù)據(jù)

for (int i = 0; i < dt.Rows.Count; i++)
{
DataRow dr = dt.Rows[i];
dr.BeginEdit();
dr["Column"] = "value";
dr.EndEdit();
}

4、在DataTable中進(jìn)行數(shù)據(jù)的查詢，并更新查詢到行的其他列數(shù)據(jù)

DataTable dt;
DataRow[] rows = dt.Select("×××號 like '%" + inputId.Text.ToString().Trim() + "%'");//根據(jù)從inputId中獲取的值在DataTable中進(jìn)行數(shù)據(jù)查詢
Console.WriteLine(rows[0][0]);//打印處第1行第1列數(shù)據(jù)
rows[0]["columnName"] = "value";

5、刪除DataTable中的列

table.Columns.Remove(table.Columns["ColumnName"]); 

6、刪除DataTable中的行

table.Rows.Remove(table.Rows[i]);

參考資料：    DataTable的增刪改查操作    http://www.studyofnet.com/news/251.html