我试图在 Google 图表中显示一些数据,但出现此错误:
Data column(s) for axis #0 cannot be of type string..
我有这个类的两个属性:
public class GAStatistics
{
public string Date { get; set; }
public string Visitors { get; set; }
}
我正在从这个 Controller 传递这些属性的列表:
public class GAStatisticsController : Controller
{
//GET: /ShopStatistics/
public ActionResult GetData()
{
return Json(CreateCompaniesList(), JsonRequestBehavior.AllowGet);
}
private IEnumerable<GAStatistics> CreateCompaniesList()
{
List<GAStatistics> ListGaVisitors = new List<GAStatistics>();
foreach (var row in d.Rows)
{
GAStatistics GaVisits = new GAStatistics(row[0], row[1]);
ListGaVisitors.Add(GaVisits);
}
return ListGaVisitors;
}
}
我从 Controller 传递列表到这个 View :
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", { packages: ["corechart"] });
google.load("visualization", "1", { packages: ["treemap"] });
google.setOnLoadCallback(drawChart);
function drawChart() {
$.get('/GAStatistics/GetData', {},
function (data) {
var tdata = new google.visualization.DataTable();
tdata.addColumn('string', 'Date');
tdata.addColumn('string', 'Visitors');
for (var i = 0; i < data.length; i++) {
//tdata.addRow([data[i].Year, data[i].Salary, data[i].Expense]);
tdata.addRow([data[i].Date, data[i].Visitors]);
}
var options = {
title: "Expenses, salary For the current year"
};
var chart1 = new google.visualization.AreaChart(document.getElementById('chart_div1'));
chart1.draw(tdata, options);
});
}
</script>
有什么想法吗?
最佳答案
我测试了您的示例,发现主要问题是因为第二列 Visitors
应该是数字而不是字符串。
我已经替换了 tdata.addColumn('number', 'Visitors');
行中的列类型并在循环内添加了 parseInt
:
tdata.addColumn('date', 'Date');
tdata.addColumn('number', 'Visitors');
// sample data: var data = [{ Date: "20140124", Visitors: "873" }, { Date: "20140125", Visitors: "875" }];
for (var i = 0; i < data.length; i++) {
var dateStr = data[i].Date.substr(0, 4) + "-" + data[i].Date.substr(4,2) + "-" + data[i].Date.substr(6,2);
tdata.addRow([new Date(dateStr), parseInt(data[i].Visitors)]);
}
第一列 Date
也可以保留为 string
,但我将其类型替换为 date
并添加了 new Date
转换也是如此。
关于c# - 轴 #0 的数据列不能是字符串类型 - Google 图表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22413879/