利用owc11绘制图（显示的是图片）
基本原理：
通过html页面传递一些参数到.aspx.cs执行，然后得到返回的图片显示在html页。
需引用 Interop.OWC11.dll
1、html页代码：
<img id="ImgZZT" src="images/chartlaoding.gif" />
<script type="text/javascript">
function ShowImage(url, imgid) {
document.getElementById("" + imgid + "").src = url;
}
var title = "";
var fxsj = "百分比（%）";
var tblx = "pie";//图的类型，pie表示饼图，bar表示柱状图
var rdm = Math.random();
var xfjgbh=<%=hdXfjgbh.Value%>;
var xfdwjb=<%=hdXfdwjb.Value%>;
var url = encodeURI("Graph_jdpg.aspx?xfjgbh=" + xfjgbh + "&xfdwjb=" + xfdwjb + "&tblx=" + tblx + "&fxsj=" + fxsj + "&title=" + title + "&rdm=" + rdm);
ShowImage(url, "ImgZZT");
</script>
2、Graph_jdpg.aspx.cs代码
DataSet ds = null;
string sql = string.Empty;
string xfdwjb = string.Empty;
string xfjgbh = string.Empty;
if (Request.QueryString["xfdwjb"] != null && Request.QueryString["xfjgbh"] != null)
{
xfdwjb = Request.QueryString["xfdwjb"].ToString().Trim();
xfjgbh = Request.QueryString["xfjgbh"].ToString().Trim();
DAL.XFJG d_xfjg = new DAL.XFJG();
ds = d_xfjg.GetXFJGListProc(xfdwjb, xfjgbh, "getGraph_jdpg");//获取要显示的数据
}
if (ds.Tables[0].Rows.Count > 0)
{
object objPic = MyChart.GetPic(ds, Request.QueryString["tblx"].ToString(), Request.QueryString["title"].ToString(), Request.QueryString["fxsj"].ToString(), 230, 150, "#ffffff", "#ffffff");//这是画图的真正核心方法
if (objPic == null)
Response.End();
Array arr = (Array)objPic;
Response.Expires = 0;
Response.Buffer = true;
Response.Clear();
MemoryStream memStream = new MemoryStream((byte[])arr);
memStream.WriteTo(Response.OutputStream);
memStream.Close();
Response.ContentType = "image/gif";
Response.StatusCode = 200;
Response.End();
}
3、MyChart.cs
using OWC11;
GetPic（）方法
///
<summary>
///
///
</summary>
///
<param name="ds">
含有显示数据的dataset
</param>
///
<param name="chartType">
pie,bar,line
</param>
///
<param name="chartTitle"></param>
///
<param name="axesTitle">
图的标题
</param>
///
<param name="width"></param>
///
<param name="height"></param>
///
<param name="strbackcolor">
背景颜色，比如：#e8efed
</param>
///
<param name="strBoderColor">
边框颜色，比如：#ffffff
</param>
///
<returns></returns>
public
static
object
GetPic(DataSet ds,
string
chartType,
string
chartTitle,
string
axesTitle,
int
width,
int
height,
string
strbackcolor,
string
strBoderColor)
{
string
strTitles
=
""
,strValues
=
""
;
DsToStr(
ref
strTitles,
ref
strValues,ds.Tables[
0
]);
ChartSpace chartSpace
=
new
ChartSpaceClass();
//
创建ChartSpace对象来放置图表
ChChart chart
=
chartSpace.Charts.Add(
0
);
//
在ChartSpace对象中添加图表,Add方法返回Chart对象
chart.Border.Color
=
strBoderColor;
//
设置边框颜色
chart.Interior.Color
=
strbackcolor;
if
(chartTitle
!=
""
)
{
chart.HasTitle
=
true
;
chart.Title.Caption
=
chartTitle;
chart.Title.Font.Size
=
12
;
chart.Title.Font.Bold
=
true
;
chart.Title.Font.Name
=
"
宋体
"
;
}
if
(chartType
==
"
bar
"
)
{
chart.Type
=
OWC11.ChartChartTypeEnum.chChartTypeColumnClustered3D;
//
.chChartTypeColumnStacked3D;，如果要平面柱状图，则为chChartTypeColumnClustered 20100701 yg
chart.PlotArea.BackWall.Interior.Color
=
"
#FFFFFF
"
;
//
背景墙的颜色
chart.PlotArea.BackWall.Thickness
=
0
;
//
背景墙的厚度
chart.PlotArea.SideWall.Interior.Color
=
"
#FFFFFF
"
;
//
边墙的颜色
chart.PlotArea.SideWall.Thickness
=
0
;
//
边墙的厚度
chart.PlotArea.Floor.Interior.Color
=
"
#FFFFFF
"
;
//
底墙的底色
chart.PlotArea.Floor.Thickness
=
0
;
//
设置底墙的厚度
chart.ProjectionMode
=
OWC11.ChartProjectionModeEnum.chProjectionModeOrthographic;
//
设置投影方式
chart.Inclination
=
8
;
//
设置倾角,指定三维图表的视图斜率(-90 - 90)
chart.ChartDepth
=
15
;
//
设置深度比,指定三维图表相对于宽度的深度(0-500)
chart.ExtrudeAngle
=
55
;
//
延伸方向(0-360)，仅在chProjectionModeOrthographic时有效
chart.Axes[
1
].Scaling.Minimum
=
0
;
if
(axesTitle
!=
""
)
{
chart.Axes[
1
].HasTitle
=
true
;
chart.Axes[
1
].Title.Caption
=
axesTitle;
//
设置数据轴标题,即X轴
chart.Axes[
1
].Title.Font.Size
=
10
;
}
chart.Axes[
1
].Orientation
=
(
int
)ChartLabelOrientationEnum.chLabelOrientationHorizontal;
//
设置分类标签的字体方向，X轴
chart.Axes[
0
].Font.Size
=
9
;
chart.Axes[
0
].Font.Name
=
"
宋体
"
;
chart.Axes[
0
].Orientation
=
(
int
)ChartLabelOrientationEnum.chLabelOrientationHorizontal;
//
设置分类标签的字体方向，Y轴
chart.Axes[
1
].HasMajorGridlines
=
false
;
//
去掉水平网线
chart.Axes[
1
].HasMinorGridlines
=
false
;
//
去掉水平网线
ChSeries objSeries
=
chart.SeriesCollection.Add(
0
);
//
添加一个series
ChDataLabels objDataLabels
=
objSeries.DataLabelsCollection.Add();
objDataLabels.HasValue
=
true
;
//
柱子上面的数字是否显示
//
objDataLabels.HasPercentage = true;
objDataLabels.Font.Color
=
"
Black
"
;
//
柱子上面的数字颜色是黑色的
objSeries.SetData( OWC11.ChartDimensionsEnum.chDimCategories,(
int
)OWC11.ChartSpecialDataSourcesEnum.chDataLiteral,strTitles );
//
给定series的分类
objSeries.SetData( OWC11.ChartDimensionsEnum.chDimValues,(
int
)OWC11.ChartSpecialDataSourcesEnum.chDataLiteral,strValues );
//
给定具体值
for
(
int
i
=
0
;i
<
objSeries.Points.Count;i
++
)
{
if
(i
>
14
)
break
;
objSeries.Points[i].Interior.Color
=
colorArr[i];
objSeries.Points[i].Border.Color
=
colorArr[i];
}
}
else
if
(chartType
==
"
line
"
)
{
chart.Type
=
OWC11.ChartChartTypeEnum.chChartTypeSmoothLineMarkers;
//
曲线
chart.PlotArea.Interior.Color
=
"
#FAFAFA
"
;
//
背景墙的颜色
if
(axesTitle
!=
""
)
{
chart.Axes[
1
].HasTitle
=
true
;
chart.Axes[
1
].Title.Caption
=
axesTitle;
//
设置数据轴标题
chart.Axes[
1
].Title.Font.Size
=
10
;
}
chart.Axes[
1
].Scaling.Minimum
=
0
;
chart.Axes[
0
].Font.Size
=
10
;
chart.Axes[
0
].Font.Name
=
"
宋体
"
;
chart.Axes[
0
].Orientation
=
(
int
)ChartLabelOrientationEnum.chLabelOrientationHorizontal;
//
设置分类标签的字体方向
ChSeries objSeries
=
chart.SeriesCollection.Add(
0
);
//
添加一个series
ChDataLabels objDataLabels
=
objSeries.DataLabelsCollection.Add();
objDataLabels.HasValue
=
true
;
//
柱子上面的数字是否显示
objDataLabels.Font.Color
=
"
Black
"
;
//
柱子上面的数字颜色是黑色的
objSeries.SetData( OWC11.ChartDimensionsEnum.chDimCategories,(
int
)OWC11.ChartSpecialDataSourcesEnum.chDataLiteral,strTitles );
//
给定series的分类
objSeries.SetData( OWC11.ChartDimensionsEnum.chDimValues,(
int
)OWC11.ChartSpecialDataSourcesEnum.chDataLiteral,strValues );
//
给定具体值
objSeries.Line.Color
=
colorArr[
0
];
objSeries.Interior.Color
=
colorArr[
3
];
}
else
if
(chartType
==
"
pie
"
)
{
//
chart.HasTitle = true;
//
chart.Title.Caption = axesTitle.Substring(0,axesTitle.IndexOf("（"));
//
chart.Title.Font.Size = 10;
//
chart.Title.Font.Bold = true;
//
chart.Title.Font.Name = "宋体";
chart.Type
=
OWC11.ChartChartTypeEnum.chChartTypePieExploded3D;
chart.ProjectionMode
=
OWC11.ChartProjectionModeEnum.chProjectionModePerspective;
//
设置投影方式,透视
chart.Perspective
=
15
;
//
透视系数
chart.Inclination
=
64
;
chart.HasLegend
=
true
;
chart.Legend.Position
=
ChartLegendPositionEnum.chLegendPositionRight;
//
图例在图片右侧
chart.Legend.Font.Size
=
9
;
//
设置图例字体
chart.Legend.Font.Name
=
"
宋体
"
;
ChSeries objSeries
=
chart.SeriesCollection.Add(
0
);
//
添加一个series
objSeries.SetData( OWC11.ChartDimensionsEnum.chDimCategories,(
int
)OWC11.ChartSpecialDataSourcesEnum.chDataLiteral,strTitles );
//
给定series的分类
objSeries.SetData( OWC11.ChartDimensionsEnum.chDimValues,(
int
)OWC11.ChartSpecialDataSourcesEnum.chDataLiteral,strValues );
//
给定具体值
ChDataLabels objDataLabels
=
objSeries.DataLabelsCollection.Add();
objDataLabels.HasValue
=
false
;
//
显示各部分的数值
objDataLabels.HasPercentage
=
true
;
//
显示各部分的百分比
objDataLabels.Font.Size
=
10
;
//
设置饼状图中字体的大小
objDataLabels.Font.Color
=
"
Black
"
;
for
(
int
i
=
0
;i
<
objSeries.Points.Count;i
++
)
{
if
(i
>
14
)
break
;
objSeries.Points[i].Interior.Color
=
colorArr[i];
objSeries.Points[i].Border.Color
=
colorArr[i];
}
}
else
{
return
null
;
}
object
objPic
=
chartSpace.GetPicture(
"
GIF
"
, width, height);
return
objPic;
}
DsToStr方法
///
<summary>
///
转换DataTable为OWC特定格式字符串
///
</summary>
///
<param name="strTitles">
组标签字符串
</param>
///
<param name="strValues">
数据字符串
</param>
///
<param name="dt">
DataTable数据源
</param>
private
static
void
DsToStr(
ref
string
strTitles,
ref
string
strValues,DataTable dt)
{
string
[] titles
=
new
string
[dt.Rows.Count];
string
[] values
=
new
string
[dt.Rows.Count];
for
(
int
i
=
0
;i
<
dt.Rows.Count;i
++
)
{
titles[i]
=
dt.Rows[i][
0
].ToString()
==
""
?
"
未知
"
: dt.Rows[i][
"
mc
"
].ToString();
values[i]
=
dt.Rows[i][
1
].ToString()
==
""
?
"
0
"
: dt.Rows[i][
"
val
"
].ToString();
}
strTitles
=
String.Join(
"
\t
"
,titles);
strValues
=
String.Join(
"
\t
"
,values);
}
增值服务哈：office自带的关于owc的帮助文档：
C:\Program Files\Common Files\Microsoft Shared\Web Components\11\2052\OWCVBA11.CHM