我正在尝试从数据表生成折线图，但输出不正常。我想那里存在与轴相关的问题。因此，如果有人纠正我的代码，那将是很大的帮助。
private void button1_Click(object sender, EventArgs e)
{
System.Data.DataTable dt = GetGraphData();
Excel.Application xla = new Excel.Application();
xla.Visible = true;
Excel.Workbook wb = xla.Workbooks.Add(Excel.XlSheetType.xlWorksheet);
Excel.Worksheet ws = (Excel.Worksheet)wb.ActiveSheet;
//********************** Now create the chart. *****************************
Excel.ChartObjects chartObjs = (Excel.ChartObjects)ws.ChartObjects(Type.Missing);
Excel.ChartObject chartObj = chartObjs.Add(250, 60, 300, 300);
Excel.Chart xlChart = chartObj.Chart;
int nRows = 2;
int nColumns = dt.Rows.Count;
string upperLeftCell = "B2";
int endRowNumber = System.Int32.Parse(upperLeftCell.Substring(1))
+ nRows - 1;
char endColumnLetter = System.Convert.ToChar(
Convert.ToInt32(upperLeftCell[0]) + nColumns - 1);
string upperRightCell = System.String.Format("{0}{1}",
endColumnLetter, System.Int32.Parse(upperLeftCell.Substring(1)));
string lowerRightCell = System.String.Format("{0}{1}",
endColumnLetter, endRowNumber);
Excel.Range rg = ws.get_Range(upperLeftCell, lowerRightCell);
for (int i = 1; i <= dt.Rows.Count; i++)
{
rg[1, i] = dt.Rows[i - 1][0].ToString(); //For Adding Header Text
rg[2, i] = int.Parse(dt.Rows[i - 1][1].ToString()); //For Adding Datarow Value
}
Excel.Range chartRange = ws.get_Range(upperLeftCell, lowerRightCell);
xlChart.SetSourceData(chartRange, Type.Missing);
xlChart.ChartType = Excel.XlChartType.xlLine;
// *******************Customize axes: ***********************
Excel.Axis xAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlCategory,
Excel.XlAxisGroup.xlPrimary);
//xAxis.HasTitle = true;
// xAxis.AxisTitle.Text = "X Axis";
//Excel.Axis yAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlSeriesAxis,
// Excel.XlAxisGroup.xlPrimary);
//3d chart
//yAxis.HasTitle = true;
//yAxis.AxisTitle.Text = "Y Axis";
Excel.Axis zAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlValue,
Excel.XlAxisGroup.xlPrimary);
//zAxis.HasTitle = true;
//zAxis.AxisTitle.Text = "Z Axis";
// *********************Add title: *******************************
xlChart.HasTitle = true;
xlChart.ChartTitle.Text = "Project Status Graph";
// *****************Set legend:***************************
xlChart.HasLegend = true;
//FileStream file = new FileStream(@"d:\pop.xls", FileMode.Create);
//file.Close();
wb.SaveCopyAs(@"d:\pop.xls");
// ****************For Quiting The Excel Aplication ***********************
if (xla != null)
{
xla.DisplayAlerts = false;
wb.Close();
wb = null;
xla.Quit();
xla = null;
}
}
private System.Data.DataTable GetGraphData()
{
System.Data.DataTable dt = new System.Data.DataTable();
dt.Columns.AddRange(new DataColumn[2] { new DataColumn("ProjectStatus"), new DataColumn("per") });
DataRow dr1 = dt.NewRow();
dr1[0] = "Compleet";
dr1[1] = 20;
dt.Rows.Add(dr1);
DataRow dr2 = dt.NewRow();
dr2[0] = "Pending";
dr2[1] = 20;
dt.Rows.Add(dr2);
DataRow dr3 = dt.NewRow();
dr3[0] = "UnCompleet";
dr3[1] = 20;
dt.Rows.Add(dr3);
return dt;
}
我想这些下面的线不好。
Excel.Axis xAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlCategory,
Excel.XlAxisGroup.xlPrimary);
//xAxis.HasTitle = true;
// xAxis.AxisTitle.Text = "X Axis";
//Excel.Axis yAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlSeriesAxis,
// Excel.XlAxisGroup.xlPrimary);
//3d chart
//yAxis.HasTitle = true;
//yAxis.AxisTitle.Text = "Y Axis";
Excel.Axis zAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlValue,
Excel.XlAxisGroup.xlPrimary);
//zAxis.HasTitle = true;
//zAxis.AxisTitle.Text = "Z Axis";
这样我解决了
这只是一个示例代码而不是现实生活中的实现
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel;
using System.IO;
namespace WindowsForms_chartexcel
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void Form2_Load(object sender, EventArgs e)
{
Excel.Application xlApp ;
Excel.Workbook xlWorkBook ;
Excel.Worksheet xlWorkSheet ;
object misValue = System.Reflection.Missing.Value;
xlApp = new Excel.Application();
xlWorkBook = xlApp.Workbooks.Add(misValue);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
//add data
xlWorkSheet.Cells[1, 1] = "";
xlWorkSheet.Cells[1, 2] = "Student1";
xlWorkSheet.Cells[1, 3] = "Student2";
xlWorkSheet.Cells[1, 4] = "Student3";
xlWorkSheet.Cells[2, 1] = "Term1";
xlWorkSheet.Cells[2, 2] = "80";
xlWorkSheet.Cells[2, 3] = "65";
xlWorkSheet.Cells[2, 4] = "45";
xlWorkSheet.Cells[3, 1] = "Term2";
xlWorkSheet.Cells[3, 2] = "78";
xlWorkSheet.Cells[3, 3] = "72";
xlWorkSheet.Cells[3, 4] = "60";
xlWorkSheet.Cells[4, 1] = "Term3";
xlWorkSheet.Cells[4, 2] = "82";
xlWorkSheet.Cells[4, 3] = "80";
xlWorkSheet.Cells[4, 4] = "65";
xlWorkSheet.Cells[5, 1] = "Term4";
xlWorkSheet.Cells[5, 2] = "75";
xlWorkSheet.Cells[5, 3] = "82";
xlWorkSheet.Cells[5, 4] = "68";
Excel.Range chartRange ;
Excel.ChartObjects xlCharts = (Excel.ChartObjects)xlWorkSheet.ChartObjects(Type.Missing);
Excel.ChartObject myChart = (Excel.ChartObject)xlCharts.Add(200, 80, 300, 250);
Excel.Chart chartPage = myChart.Chart;
chartRange = xlWorkSheet.get_Range("A1", "d5");
chartPage.SetSourceData(chartRange, misValue);
//chartPage.ChartType = Excel.XlChartType.xlColumnClustered;
chartPage.ChartType = Excel.XlChartType.xlLine;
if (File.Exists(@"d:\test.xls"))
{
File.Delete(@"d:\test.xls");
}
xlWorkBook.SaveAs(@"d:\test.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();
releaseObject(xlWorkSheet);
releaseObject(xlWorkBook);
releaseObject(xlApp);
MessageBox.Show("Excel file created , you can find the file d:\test.xls");
}
private void releaseObject(object obj)
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
obj = null;
}
catch (Exception ex)
{
obj = null;
MessageBox.Show("Exception Occured while releasing object " + ex.ToString());
}
finally
{
GC.Collect();
}
}
}
}