c# - 如何在 Datagridview C# 中显示更多表

Question

我可以使用 C# 和 mysql 按日期排序在一个 datagridview 中显示两个或多个表吗？

例如:

<小时/>

|表1.销售编号|表1.salesMoney |表1.日期1 |

|表2.购买否|表2.purchMoney |表2.日期2 |

|表2.购买否|表2.purchMoney |表2.日期3 |

|表1.销售编号|表1.salesMoney |表1.日期4 |

|表1.销售编号|表1.salesMoney |表1.日期5 |

<小时/>

我使用了此代码，但没有出现数据

 private MySqlDataAdapter salesinvoices, purchasesinvoices;
        private DataSet jedataset;
private void button2_Click(object sender, EventArgs e)
      {
          const string SELECT_salesinvoices = "SELECT * FROM sales_invoices";
          const string SELECT_purchasesinvoices = "SELECT * FROM purchase_invoices";



          // Compose the connection string.
          string connect_string = Publics.je_Coonn;

          // Create a DataAdapter to load the Addresses table.
          salesinvoices = new MySqlDataAdapter(SELECT_salesinvoices,
              connect_string);

          // Create a DataAdapter to load the Addresses table.
          purchasesinvoices = new MySqlDataAdapter(SELECT_purchasesinvoices,
              connect_string);

          // Create and fill the DataSet.
          jedataset = new DataSet("je_coronasalesdbDataSet");
          salesinvoices.Fill(jedataset, "sales_invoices");
          purchasesinvoices.Fill(jedataset, "purchase_invoices");

          // Bind the DataGrid to the DataSet.
          dataGridView1.DataSource = jedataset;
      }

谢谢

Answer 1

据我所知，DataBind() 仅适用于 Web 表单。尝试仅与属性 .DataSource 绑定(bind)。万一仍然不起作用，请尝试 .Refresh()

dataGridView1.DataSource = jedataset;
dataGridView1.Refresh();

编辑:如果您仍然没有看到任何数据，请添加:

dataGridView1.AutoGenerateColumns = true

(我不知道您是否已经添加了这些列)

编辑2:找到此代码here ，我没有测试它，但你可以调整它并尝试是否有效:

private static void DemonstrateMergeTable()
{
    DataTable table1 = new DataTable("Items");

    // Add columns
    DataColumn column1 = new DataColumn("id", typeof(System.Int32));
    DataColumn column2 = new DataColumn("item", typeof(System.Int32));
    table1.Columns.Add(column1);
    table1.Columns.Add(column2);

    // Set the primary key column.
    table1.PrimaryKey = new DataColumn[] { column1 };



    // Add some rows.
    DataRow row;
    for (int i = 0; i <= 3; i++)
    {
        row = table1.NewRow();
        row["id"] = i;
        row["item"] = i;
        table1.Rows.Add(row);
    }

    // Accept changes.
    table1.AcceptChanges();
    PrintValues(table1, "Original values");

    // Create a second DataTable identical to the first.
    DataTable table2 = table1.Clone();

    // Add three rows. Note that the id column can't be the  
    // same as existing rows in the original table.
    row = table2.NewRow();
    row["id"] = 14;
    row["item"] = 774;
    table2.Rows.Add(row);

    row = table2.NewRow();
    row["id"] = 12;
    row["item"] = 555;
    table2.Rows.Add(row);

    row = table2.NewRow();
    row["id"] = 13;
    row["item"] = 665;
    table2.Rows.Add(row);

    // Merge table2 into the table1.
    Console.WriteLine("Merging");
    table1.Merge(table2);
    PrintValues(table1, "Merged With table1");

}