来自多个表的图表 [英] Chart from multiple tables

问题描述

我有三个表，分别称为存款，借方和转账，像

I have three tables named Deposit, Debit and Transfer, like

Deposit  { DepositID, DepostDate, Amount}
Debit    { DebitID, DebitDate, Amount}
Transfer { TransferID, TransferDate, Amount}

如何在一个图表中显示所有三个表？我什至想知道是否最好将这三个表放到一个表中，例如

How can I show all three tables in one chart? I am even wondering if it is better to put those three tables into one table instead, like

Transaction {TransactionId, TransactionTypeId, TransactionDate, Amount} 

其中TransactiontypeId可以是1 =用于存款，2用于借记，3用于转移和绑定此交易表到图表。
比方说，我将所有表都放在一个表中，并以表名命名，然后@ mm8的交易帮助我弄清了这一点：

where TransactiontypeId could be 1 = for Deposit, 2 for Debit and 3 for Transfer and bind this transaction table to the chart. Let's say I have all those in one table instead and with table name Transactions then @mm8 helped me figure this out:

 var result = (from pr in db.Transactions 
                  join tr in db.TransactionType on pr.TrTypeId equals tr.TransactionTypeId
                  select new
                  {
                      TransactionDate = pr.TransactionDate,
                      TransactionType = tr.TrType,
                      Amount = pr.Amount

                  }).ToList();

chart1.DataSource = result
 .GroupBy(x => x.TransactionDate.Value.Year)
    .Select(g => new
    {
        Year = g.Key,
        TransactionType = g. //////
        Amount = g.Sum(y => y.Amount)
    })
    .ToArray();

最好有一个表或多个表的图表，以及如何做多个表。

Is is better to have a chart from one table or from multiple tables and how to do multiple.

我知道我必须为每个表创建不同的序列，如下所示：

I am aware that I have to create different series for every table like this:

var Depseries = chart1.Series.Add("Deposit");
Depseries.XValueMember = "Year";
Depseries.YValueMembers = "DepositAmount";
Depseries.Name = "Deposit";
chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;
chart1.Series["Deposit"].IsValueShownAsLabel = true;
Depseries.CustomProperties = "LabelStyle=Left";

// Debit

var Debseries = chart1.Series.Add("Debit");
Debseries.XValueMember = "Year";
Debseries.YValueMembers = "DebitAmount";
Debseries.Name = "Debit";
chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;
chart1.Series["Debit"].IsValueShownAsLabel = true;
Debseries.CustomProperties = "LabelStyle=Left";

// Transfer
var FDseries = chart1.Series.Add("Transfer");
FDseries.XValueMember = "Year";
FDseries.YValueMembers = "TransferAmount";
FDseries.Name = "Transfer";
chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;
chart1.Series["Transfer"].IsValueShownAsLabel = true;
FDseries.CustomProperties = "LabelStyle=Left";  

推荐答案

您只需从每个表中选择数据然后使用 DataBind 方法为数据填充序列，例如：

You could just select the data from each of the tables and then use the DataBind method to populate the series with data, e.g.:

var deposits = (from x in db.Deposits select new { x.DepositDate, x.Amount })
    .ToArray()
    .GroupBy(x => x.DepositDate.Year)
    .Select(g => new { Year = g.Key, Amount = g.Sum(y => y.Amount) })
    .ToArray();
var Depseries = chart1.Series.Add("Deposit");
Depseries.XValueMember = "Year";
Depseries.YValueMembers = "DepositAmount";
Depseries.Name = "Deposit";
chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;
chart1.Series["Deposit"].IsValueShownAsLabel = true;
Depseries.CustomProperties = "LabelStyle=Left";
chart1.Series["Deposit"].Points.DataBind(deposits, "Year", "Amount", null);

var debits = (from x in db.Debits select new { x.DebitDate, x.Amount })
    .ToArray()
    .GroupBy(x => x.DebitDate.Year)
    .Select(g => new { Year = g.Key, Amount = g.Sum(y => y.Amount) })
    .ToArray();
var Debseries = chart1.Series.Add("Debit");
Debseries.XValueMember = "Year";
Debseries.YValueMembers = "DebitAmount";
Debseries.Name = "Debit";
chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;
chart1.Series["Debit"].IsValueShownAsLabel = true;
Debseries.CustomProperties = "LabelStyle=Left";
chart1.Series["Debit"].Points.DataBind(debits, "Year", "Amount", null);

...

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