i would very appreciate any one who can help. I wan to make a column in a table which is come from summarize of col 1 + col 2 + col 3 in every row i tried this code but the result is not summarize but likes concatenate from col 1 and col 2...
rows: List<DataRow>.generate(
snapshot.data!.length,
(index) {
var data = snapshot.data![index];
return DataRow(
color: MaterialStateColor.resolveWith((states) =>
index % 2 == 1
? const Color.fromRGBO(34, 150, 243, 0.2)
: const Color.fromARGB(0, 140, 233, 148)),
cells: [
DataCell(
Text(
(Format.convertTo(
double.tryParse(data.lapus1_n1), 0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
),
DataCell(
Text(
(Format.convertTo(
double.tryParse(data.lapus2_n1), 0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
//textAlign: TextAlign.right,
),
DataCell(
Text(
(Format.convertTo(
double.tryParse(data.lapus3_n1), 0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
),
DataCell(
Text(
(Format.convertTo(
double.tryParse(
data.lapus2_n1 + data.lapus3_n1),
0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
),
]);
},
).toList(),
the output is like this: enter image description here
change the below code like this and let me know,
(Format.convertTo((double.tryParse(data.lapus2_n1) + double.tryParse(data.lapus3_n1)),0)),
issues is you try to add the string then try to parse it. just parse both value then add.
rows: List<DataRow>.generate(
snapshot.data!.length,
(index) {
var data = snapshot.data![index];
return DataRow(
color: MaterialStateColor.resolveWith((states) =>
index % 2 == 1
? const Color.fromRGBO(34, 150, 243, 0.2)
: const Color.fromARGB(0, 140, 233, 148)),
cells: [
DataCell(
Text(
(Format.convertTo(
double.tryParse(data.lapus1_n1), 0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
),
DataCell(
Text(
(Format.convertTo(
double.tryParse(data.lapus2_n1), 0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
//textAlign: TextAlign.right,
),
DataCell(
Text(
(Format.convertTo(
double.tryParse(data.lapus3_n1), 0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
),
DataCell(
Text(
(Format.convertTo((double.tryParse(data.lapus2_n1) + double.tryParse(data.lapus3_n1)),0)),
style: const TextStyle(
color: Color.fromARGB(255, 17, 17, 17),
fontWeight: FontWeight.normal,
fontSize: 12,
),
),
),
]);
},
).toList(),