Friday, November 13, 2009

SharePoint charting (Chart inside web part)


In my article on "SharePoint Web Part Development Tutorial" I discussed how we can develop and deploy custom SharePoint web part with visual designing. Now let’s see how we can add a chart for that web part. Finally you will be getting a result like following picture.



To create the above chart I’m getting data from a SharePoint list as follow.



You can see I’m showing the chart inside my custom web part called "My first custom Web Part". There I used the code from "Free Google Chart SharePoint Web Part" and customized it as I want. These are the steps to add nice chart to your web part for free.

First Create your custom web part, don’t deploy at this stage.

Then add a Class called “Chart.cs” and replace the code using following code.

View Code

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using Microsoft.SharePoint;

namespace ProjectView{
public class Chart{

protected string _BGColor = "FFFFFF";
protected string _ChartColor = "0099ff,ff0000";
protected int _ChartHeight = 400;
protected LegendPositions _ChartLegend;
protected string _ChartTitle = "Burn Down Chart";
protected ChartTypes _ChartType;
protected int _ChartWidth = 720;
protected string _DataField = "Planned Effort,Actual Effort";
protected string _LabelField = "Title";
protected string _ListName = "";
protected string _SiteName = "http://merdev-moss:5050/";
protected string _ViewName = "";

public enum ChartTypes{
Line,
VerticalBar,
Pie,
Pie3D,
HorizontalBar
}
public enum LegendPositions{
horizontal_top,
vertical_left,
horizontal_bottom,
vertical_top,
vertical_bottom,
vertical_right
}
public string createChartString(string listName){
_ListName = listName;

string str = "";
string str2 = "";

SPSite site = new SPSite(this._SiteName);
SPWeb web = site.OpenWeb();
try{
if (!string.IsNullOrEmpty(this._ListName)){
SPList list = null;
SPListItemCollection items = null;
try{
string[] strArray3;
int num5;
list = web.Lists[this._ListName];
if (!string.IsNullOrEmpty(this._ViewName)){
SPView view = list.Views[this._ViewName];
items = list.GetItems(view);
}
else{
items = list.Items;
}
string str3 = "";
float num2 = 0f;
int num3 = 0;
bool flag = true;
char[] separator = new char[] { ',', ';' };
string[] strArray = this._DataField.Split(separator);
string[] strArray2 = new string[strArray.Length];
foreach (string str4 in strArray){
str2 = str2 + "<br>Series=" + str4;
if (!list.Fields.ContainsField(str4)){
str = str + "<p>Data List column not specified or not found:" + str4 + "</p>";
flag = false;
}
}
if (!list.Fields.ContainsField(this._LabelField)){
str = str + "<p>Label List column not specified or not found:" + this._LabelField + "</p>";
flag = false;
}
if (!flag){
goto Label_0868;
}
foreach (SPListItem item in items){
num3++;
try{
int index = 0;
foreach (string str5 in strArray){
string[] strArray7;
IntPtr ptr2;
float num = Convert.ToSingle(item[str5]);
if (num > num2){
num2 = num;
}
if (!string.IsNullOrEmpty(strArray2[index])){
string[] strArray6;
IntPtr ptr;
(strArray6 = strArray2)[(int)(ptr = (IntPtr)index)] = strArray6[(int)ptr] + ",";
}
string str6 = num.ToString().Replace(",", ".");
(strArray7 = strArray2)[(int)(ptr2 = (IntPtr)index)] = strArray7[(int)ptr2] + str6;
index++;
}
}
catch{
str = str + "<p>Data column error:" + this._DataField + "</p>";
}
try{
if (str3 != ""){
str3 = str3 + "|";
}
if ((this._LabelField != "LinkTitle") && (item.Fields[this._LabelField].FieldValueType == typeof(DateTime))){
str3 = str3 + ((DateTime)item[this._LabelField]).ToString("MMM yyyy");
}
else if (item[this._LabelField] != null){
str3 = str3 + item[this._LabelField].ToString();
}
continue;
}
catch{
str = str + "<p>Label column error:" + this._LabelField + "</p>";
continue;
}
}
string str7 = "";
string str8 = "";
string str9 = "";
string str10 = "";
string str11 = "";
string str12 = "";
string str13 = "";
if (!string.IsNullOrEmpty(str3)){
str3 = str3.Replace("&", "%26");
}
string str14 = num2.ToString().Replace(",", ".");
switch (this._ChartType){
case ChartTypes.Pie:
str7 = "p";
str9 = str3;
str12 = "0," + str14;
goto Label_051D;

case ChartTypes.Pie3D:
str7 = "p3";
str9 = str3;
str12 = "0," + str14;
goto Label_051D;

case ChartTypes.Line:
str7 = "lc";
str8 = "x,y";
str10 = "0:|" + str3;
str11 = "1,0," + str14;
str12 = "0," + str14;
goto Label_051D;

case ChartTypes.VerticalBar:
str7 = "bvg";
str8 = "x,y";
str10 = "0:|" + str3;
str11 = "1,0," + str14;
str12 = "0," + str14;
str13 = "a";
goto Label_051D;

case ChartTypes.HorizontalBar:
str7 = "bhg";
str8 = "x,y";
strArray3 = str3.Split(new char[] { '|' });
str3 = "";
num5 = strArray3.Length - 1;
goto Label_04DE;

default:
str7 = "p";
goto Label_051D;
}
Label_04AE:
if (str3 != ""){
str3 = str3 + "|";
}
str3 = str3 + strArray3[num5];
num5--;
Label_04DE:
if (num5 >= 0){
goto Label_04AE;
}
str10 = "1:|" + str3;
str11 = "0,0," + str14;
str12 = "0," + str14;
str13 = "a";
Label_051D:
if (str == ""){
object obj2 = str;
str = string.Concat(new object[] { obj2, "?chs=", this._ChartWidth, "x", this._ChartHeight });
if (!string.IsNullOrEmpty(this._ChartTitle)){
string str15 = this._ChartTitle.Replace(" ", "+");
str = str + "&chtt=" + str15.Replace("&", "%26");
}
str = (str + "&cht=" + str7) + "&chts=000000,17" + "&chd=t:";
int num6 = 0;
string[] strArray8 = strArray;
for (int i = 0; i < strArray8.Length; i++){
string text1 = strArray8[i];
if (num6 > 0){
str = str + "|";
}
str = str + strArray2[num6];
num6++;
}
str = str + "&chf=bg,s," + this._BGColor;
if (this._ChartColor != ""){
str = str + "&chco=" + this._ChartColor;
}
if (str9 != ""){
str = str + "&chl=" + str9;
}
if (str8 != ""){
str = str + "&chxt=" + str8;
}
if (str10 != ""){
str = str + "&chxl=" + str10;
}
if (str11 != ""){
str = str + "&chxr=" + str11;
}
if (str12 != ""){
str = str + "&chds=" + str12;
}
if (str13 != ""){
str = str + "&chbh=" + str13;
}
str = str + "&chg=" + ((100.0 / ((double)num3))).ToString("F") + ",20";
if (strArray.Length > 1){
str = str + "&chdl=";
int num7 = 0;
foreach (string str16 in strArray){
if (num7 > 0){
str = str + "|";
}
str = str + str16;
num7++;
}
str = str + "&chdlp=";
switch (this._ChartLegend){
case LegendPositions.horizontal_top:
str = str + "t";
break;

case LegendPositions.horizontal_bottom:
str = str + "b";
break;

case LegendPositions.vertical_top:
str = str + "tv";
break;

case LegendPositions.vertical_bottom:
str = str + "bv";
break;

case LegendPositions.vertical_left:
str = str + "l";
break;

case LegendPositions.vertical_right:
str = str + "r";
break;
}
}
str2 = str2 + "<br>" + str.Replace("&", "<br>&");
str = "http://chart.apis.google.com/chart" + str;
}
}
catch{
str = this._ListName + ": Sharepoint List not found!";
}
}
else{
str = "No Sharepoint List defined!";
}
}
catch (Exception){
str = "<br>Site not found:" + this._SiteName;
}
Label_0868:
return str;
}
}
}

Now change the variable names according to your site, list and columns.

Then Add this line to your .ascx file.

Now replace your "Page_Load" method as follows.

Now you can built and deploy your web part to see the result. You can get VerticalBar,Pie,Pie3D and HorizontalBar charts by changing the "ChartType" in the above code.

1 comment:

  1. hi, i have followed all the steps above, but it gives an error on page load:

    CreateChildControls_Exception: Object reference not set to instance of an object.

    Can you please guide.

    ReplyDelete

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