[英]ASP.NET c# adding row to dataset
i have a dataset which im using to calculate some sales figures, this data set has about 15 columns i want to add a new row to the end of the dataset to calculate the total of each column. 我有一个数据集,我正在使用该数据集来计算一些销售数字,该数据集大约有15列,我想在数据集的末尾添加新行以计算每一列的总数。 heres an example of what the dataset looks like 这是数据集的示例
NAME | GP | ORD_GP | EXP | TOTAL GP
a 206 48 -239 15
b 0 27 0 27
so what i want to be able to do is add another row at the end which will calulate the sum of each row so it would look something like 所以我想要做的是在末尾添加另一行,这将计算每一行的总和,因此它看起来像
NAME | GP | ORD_GP | EXP | TOTAL GP
a 206 48 -239 15
b 0 27 0 27
TOTAL 206 75 -239 42
so far i have 到目前为止,我有
ds.Tables[0].Rows.Add("TOTAL");
foreach (DataColumn dc in ds.Tables[0].Columns)
{
// add upp column data and put into toal field
}
Have a look at the DataTable.Compute method: 看一下DataTable.Compute方法:
private void AddTotalRow(DataTable dt)
{
DataRow dr = dt.NewRow();
dr["NAME"] = "TOTAL";
dr["GP"] = dt.Compute("Sum(GP)", null);
dr["ORD_GP"] = dt.Compute("Sum(ORD_GP)", null);
dr["EXP"] = dt.Compute("Sum(EXP)", null);
dr["TOTAL_GP"] = dt.Compute("Sum(TOTAL_GP)", null);
dt.Rows.Add(dr);
}
You would call this function only once, for example: 您只需调用一次此函数,例如:
AddTotalRow(ds.Tables[0]);
//Now the first DataTable in your DataSet has an additonal record with the total values
Edited according to your new informations 根据您的新信息进行编辑
How to: Add Rows to a DataTable 如何:将行添加到数据表
DataRow newCustomersRow = dataSet1.Tables["Customers"].NewRow();
newCustomersRow["CustomerID"] = "ALFKI";
newCustomersRow["CompanyName"] = "Alfreds Futterkiste";
dataSet1.Tables["Customers"].Rows.Add(newCustomersRow);
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