获取数据表c#中行的值
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Get Value of Row in Datatable c#
提问by subprime
i have a problem with my code.
我的代码有问题。
foreach (DataRow dr in dt_pattern.Rows)
{
part = dr["patternString"].ToString();
if (part != vpart)
{
System.Console.WriteLine(part);
System.Console.WriteLine("Geben Sie bitte für den Abschnitt die AT ein: ");
temp = System.Console.ReadLine();
AT = ToDouble(temp);
dr["AT"] = AT;
double xATmax = ToDouble(dr["Ampl"].ToString());
double x = ToDouble(dr["Time"].ToString());
double yATmax = ToDouble(dr["Ampl"]+1.ToString()) + AT;
double y = ToDouble(dr["Ampl"].ToString());
dr["alphaATmin"] = Gradient(x,xATmax,y,yATmax);
System.Console.WriteLine(dr["alphaATmin"]);
}
vpart = part;
}
but i need at xATmax and yATmax the Value of the next Row... Someone can help me ?
但我需要 xATmax 和 yATmax 下一行的值......有人可以帮助我吗？
采纳答案by subprime
Dont use a foreach then. Use a 'for loop'. Your code is a bit messed up but you could do something like...
那就不要使用 foreach 了。使用“for 循环”。你的代码有点乱，但你可以做一些像......
for (Int32 i = 0; i < dt_pattern.Rows.Count; i++)
{
double yATmax = ToDouble(dt_pattern.Rows[i+1]["Ampl"].ToString()) + AT;
}
Note you would have to take into account during the last row there will be no 'i+1' so you will have to use an if statement to catch that.
请注意，您必须考虑到在最后一行中将没有 'i+1'，因此您必须使用 if 语句来捕获它。
回答by John Saunders
for (int i=0; i<dt_pattern.Rows.Count; i++)
{
DataRow dr = dt_pattern.Rows[i];
}
In the loop, you can now reference row i+1 (assuming there is an i+1)
在循环中，您现在可以引用第 i+1 行（假设有一个 i+1）
回答by Justin
for (Int32 i = 1; i < dt_pattern.Rows.Count - 1; i++){
double yATmax = ToDouble(dt_pattern.Rows[i]["Ampl"].ToString()) + AT;
}
for (Int32 i = 1; i < dt_pattern.Rows.Count - 1; i++){
double yATmax = ToDouble(dt_pattern.Rows[i]["Ampl"].ToString()) + AT;
}
if you want to get around the + 1 issue
如果你想解决 +1 问题
