问题
Hello I know it might sound confusing but I hope I can get help ....
Well I'm working on asp.net mvc using MYSQL for database , and what I'm trying to make is a 2 charts show 2 different data in one graph something like this so in my controller I tried to return both but it shows one chart only ...
The controller :
public class BartestController : Controller
{
public static List<string> getChartData()
{
var returnData = new List<string>();
var Con = new MySqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["MYdb"].ConnectionString);
//BarChart1
var MySql = new MySqlCommand("select sum(c.eff) as efficinciey , d.className from usecases c , classes d where d.ClassID = c.ClassID And c.stID=3 group by ClassName;", Con);
var dataAdapter = new MySqlDataAdapter(MySql);
var dataset = new DataSet();
dataAdapter.Fill(dataset);
var chartLabel = new StringBuilder();
var chartData = new StringBuilder();
chartLabel.Append("[");
chartData.Append("[");
foreach (DataRow row in dataset.Tables[0].Rows)
{
chartLabel.Append(string.Format("'{0}',", row["ClassName"].ToString()));
chartData.Append(string.Format("{0},", row["eff"].ToString()));
}
chartData.Length++;
chartData.Append("]");
chartLabel.Length++;
chartLabel.Append("]");
chartData = chartData.Remove(chartData.Length - 3, 2);
chartLabel = chartLabel.Replace("'", "g");
chartLabel = chartLabel.Remove(chartLabel.Length - 3, 2);
returnData.Add(chartLabel.ToString());
returnData.Add(chartData.ToString());
System.Diagnostics.Debug.WriteLine("returnData: " + chartLabel);
return returnData;
}
public static List<string> getChartData2()
{
var returnData1 = new List<string>();
var Con = new MySqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["MYdb"].ConnectionString);
//BarChart1
var MySql1 = new MySqlCommand(" select count(c.UseCaseID) , d.ClassName from usecases c , classes d where d.ClassID= c.ClassID group by d.ClassName;", Con);
var dataAdapter1 = new MySqlDataAdapter(MySql1);
var dataset1 = new DataSet();
dataAdapter1.Fill(dataset1);
var chartLabel1 = new StringBuilder();
var chartData1 = new StringBuilder();
chartLabel1.Append("[");
chartData1.Append("[");
foreach (DataRow row in dataset1.Tables[0].Rows)
{
chartLabel1.Append(string.Format("'{0}',", row["ClassName"].ToString()));
chartData1.Append(string.Format("{0},", row["count(c.UseCaseID)"].ToString()));
}
chartData1.Length++;
chartData1.Append("]");
chartLabel1.Length++;
chartLabel1.Append("]");
chartData1 = chartData1.Remove(chartData1.Length - 3, 2);
chartLabel1 = chartLabel1.Replace("'", "g");
chartLabel1 = chartLabel1.Remove(chartLabel1.Length - 3, 2);
returnData1.Add(chartLabel1.ToString());
returnData1.Add(chartData1.ToString());
System.Diagnostics.Debug.WriteLine("returnData: " + chartLabel1);
return returnData1;
}
public ActionResult BartestChart()
{
List<string> returnData = getChartData();
ViewData["Chart"] = returnData;
List<string> returnData1 = getChartData2();
ViewData["Chart"] = returnData1;
return View(getChartData());
return View(getChartData2());
}
}
}
The view :
@{
ViewBag.Title = "BartestChart";
Layout = "~/Views/Shared/_MainLayout.cshtml";
int x = 0;
}
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<body style="height: 331px">
<div style="padding-top:50px"></div>
<div>
<canvas id="Chart" width="500" height="500" style="border:dashed;border-color:lightgray"></canvas>
</div>
<script src="../Scripts/jquery-1.10.2.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="../Scripts/Chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.js"></script>
<script>
var chartLabel;
var chartData = [];
</script>
@foreach (var label in (List<string>)ViewBag.Chart)
{
if (x == 1)
{
<script>
chartData = @label;
console.log(chartData);
</script>
}
else
{
<script>
chartLabel = "@label";
chartLabel = chartLabel.replace(/g/g, "\"");
chartLabel = JSON.parse(chartLabel);
console.log(chartLabel);
</script>
}
x++;
}
<script>
var chartLabel1;
var chartData1 = [];
</script>
@foreach (var label in (List<string>)ViewBag.Chart)
{
if (x == 1)
{
<script>
chartData1 = @label;
console.log(chartData1);
</script>
}
else
{
<script>
chartLabel1 = "@label";
chartLabel1 = chartLabel1.replace(/g/g, "\"");
chartLabel1 = JSON.parse(chartLabel1);
console.log(chartLabel1);
</script>
}
x++;
}
<script type="text/javascript">
var ctx = document.getElementById("Chart").getContext('2d');
var barData = {
labels: chartLabel,
datasets: [
{
label: 'Efficiency',
fillColor: "cadetblue",
strokeColor: "cadetblue",
data: chartData
} ],
labels: chartLabel1,
datasets: [
{
label: 'Efficiency',
fillColor: "green",
strokeColor: "green",
data: chartData1
} ]
};
var skillsChart = new Chart(ctx).Bar(barData);
</script>
</body>
</html>
The chart works fine before I added new command and everything to show the sec chart.... I hope I can get help
回答1:
You can do it like this:
Place the data for the 2 charts in different ViewBag elements:
public ActionResult BartestChart()
{
List<string> returnData = getChartData();
ViewBag.ChartOne = returnData;
List<string> returnData1 = getChartData2();
ViewBag.ChartTwo = returnData1;
return View();
}
And in your View:
@{
ViewBag.Title = "BartestChart";
Layout = "~/Views/Shared/_MainLayout.cshtml";
int x = 0;
}
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<body style="height: 331px">
<div style="padding-top:50px"></div>
<div>
<canvas id="Chart" width="500" height="500" style="border:dashed;border-color:lightgray"></canvas>
</div>
<script src="../Scripts/jquery-1.10.2.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="../Scripts/Chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.js"></script>
<script>
var chartLabel;
var chartData = [];
</script>
@foreach (var label in (List<string>)ViewBag.ChartOne)
{
if (x == 1)
{
<script>
chartData = @label;
console.log(chartData);
</script>
}
else
{
<script>
chartLabel = "@label";
chartLabel = chartLabel.replace(/g/g, "\"");
chartLabel = JSON.parse(chartLabel);
console.log(chartLabel);
</script>
}
x++;
}
<script>
var chartLabel1;
var chartData1 = [];
</script>
@foreach (var label in (List<string>)ViewBag.ChartTwo)
{
<script>
chartData1 = @label;
console.log(chartData1);
</script>
}
<script type="text/javascript">
var ctx = document.getElementById("Chart").getContext('2d');
var barData = {
labels: chartLabel,
datasets: [
{
label: 'Efficiency',
fillColor: "IndianRed",
strokeColor: "IndianRed",
data: chartData1
} ,
{
label: 'Efficiency',
fillColor: "Black",
strokeColor: "Black",
data: chartData
} ]
};
var skillsChart = new Chart(ctx).Bar(barData);
</script>
</body>
</html>
回答2:
You can use Third-Party charts Like Google charts or AM Charts Link For AM Charts Website
回答3:
The view :
@{
ViewBag.Title = "BartestChart";
Layout = "~/Views/Shared/_MainLayout.cshtml";
int x = 0;
}
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<body style="height: 331px">
<div style="padding-top:50px"></div>
<div>
<canvas id="Chart" width="500" height="500" style="border:dashed;border-color:lightgray"></canvas>
</div>
<script src="../Scripts/jquery-1.10.2.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="../Scripts/Chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.js"></script>
<script>
var chartLabel;
var chartData = [];
</script>
@foreach (var label in (List<string>)ViewBag.ChartOne)
{
if (x == 1)
{
<script>
chartData = @label;
console.log(chartData);
</script>
}
else
{
<script>
chartLabel = "@label";
chartLabel = chartLabel.replace(/g/g, "\"");
chartLabel = JSON.parse(chartLabel);
console.log(chartLabel);
</script>
}
x++;
}
<script>
var chartLabel1;
var chartData1 = [];
</script>
@foreach (var label in (List<string>)ViewBag.ChartTwo)
{
if (x == 1)
{
<script>
chartData1 = @label;
console.log(chartData1);
</script>
}
else
{
<script>
chartLabel1 = "@label";
chartLabel1 = chartLabel1.replace(/g/g, "\"");
chartLabel1 = JSON.parse(chartLabel1);
console.log(chartLabel1);
</script>
}
x++;
}
<script type="text/javascript">
var ctx = document.getElementById("Chart").getContext('2d');
var barData = {
labels: chartLabel,
datasets: [
{
label: 'Efficiency',
fillColor: "cadetblue",
strokeColor: "cadetblue",
data: chartData
} ,
{
label: 'Efficiency',
fillColor: "green",
strokeColor: "green",
data: chartData1
} ]
};
var skillsChart = new Chart(ctx).Bar(barData);
</script>
</body>
</html>
The change in the Controller:
public ActionResult BartestChart()
{
List<string> returnData = getChartData();
ViewBag.ChartOne = returnData;
List<string> returnData1 = getChartData2();
ViewBag.ChartTwo = returnData1;
return View();
}
来源：https://stackoverflow.com/questions/47048052/creating-2-charts-show-2-different-data-in-one-graph-asp-net-mvc