假设我有一个数据表dt(它包含广告商),我想从dt中删除一行,其中advertiserID等于一个值,我该怎么做？
DataTable dt = new DataTable();
//populate the table
dt = DynamicCache.GetAdvertisers();
//I can select a datarow like this:
DataRow[] advRow = dt.Select("advertiserID = " + AdvID);
//how do you remove it,this get's me an error
dt.Rows.Remove(advRow)
那你怎么做得对呢？
谢谢.
解决方法
advRow是一个阵列.您必须确定要删除的数组中的哪一行.
dt.Rows.Remove(advRow[0]);
当然,这只会将其从数据表中删除,不一定是它背后的数据源(sql,xml,…).这将需要更多……
在选择后检查数组或迭代数组是个好主意…
var datatable = new DataTable();
DataRow[] advRow = datatable.Select("id=1");
datatable.Rows.Remove(advRow[0]);
//of course if there is nothing in your array this will get you an error..
foreach (DataRow dr in advRow)
{
// this is not a good way either,removing an
//item while iterating through the collection
//can cause problems.
}
//the best way is:
for (int i = advRow.Length - 1; i >= 0; i--)
{
datatable.Rows.Remove(advRow[i]);
}
//then with a dataset you need to accept changes
//(depending on your update strategy..)
datatable.AcceptChanges();
