从单独的 DataRow[] 选择查询添加值
我试图从具有两个单独的 DataRow 的数据库中提取两个值并将它们添加在一起。出于某种原因，我只是对自己做错的事情一无所知，但是当我尝试将变量 p1 和 p2 添加到一起时，它们显示为未分配。
int p1;
int p2;
string count;
DataRow[] p1Count = dtCount.Select("ATTID = '" + att + " and WAVID = '20111'");
foreach (DataRow row in p1Count)
{
p1 = int.Parse(row["CountValue"].ToString());
}
DataRow[] p2Count = dtCount.Select("ATTID = '" + att + " and WAVID = '20112'");
foreach (DataRow row in p2Count)
{
p2 = int.Parse(row["CountValue"].ToString());
}
count = (p1 + p2).ToString();
sb.Append("<td nowrap ALIGN=CENTER colspan='1' bordercolor=#fff><strong>" + count + "</strong></td>");
I'm trying to pull two values from a db with two separate DataRows and add them together. For some reason I'm just going blank on what I'm doing wrong, but the variables p1 and p2 are showing as unassigned when I try to add them together.
int p1;
int p2;
string count;
DataRow[] p1Count = dtCount.Select("ATTID = '" + att + " and WAVID = '20111'");
foreach (DataRow row in p1Count)
{
p1 = int.Parse(row["CountValue"].ToString());
}
DataRow[] p2Count = dtCount.Select("ATTID = '" + att + " and WAVID = '20112'");
foreach (DataRow row in p2Count)
{
p2 = int.Parse(row["CountValue"].ToString());
}
count = (p1 + p2).ToString();
sb.Append("<td nowrap ALIGN=CENTER colspan='1' bordercolor=#fff><strong>" + count + "</strong></td>");
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Sou你基本上改成了
这
解决了你的问题。这是常见的错误。
Sou you basically changed
to
This solved your problem. This is common mistake.