c# 在其他形式的 datagridview 中使用数据表

c# use datatable in other form datagridview

您好,我搜索了很多主题,也在 Whosebug 中,但是 none 解决了我的问题

这是我的主窗体,我在其中操作我的数据库并在 datagridview 中显示项目

public partial class Form1 : Form
{

     DatabaseConnection objConnect;
     string conString;
     private static DataTable table;
     DataSet dataSet;

     public Form1()
     {
          InitializeComponent();
          CreateConnection();
          MakeDataTable();
     }

     public DataTable table
     {
          get
          {
              return table;
          }
     }

     private void MakeDataTable()
     {
          table = new DataTable();

          DataColumn column;

          column = new DataColumn();
          column.DataType = Type.GetType("System.String");
          column.ColumnName = "Name of Item";
          table.Columns.Add(column);

          etc...
     }

     //this connects to my local db through DatabaseConnection.cs
     //where I got table ItemsInWorld, 
     //from where I take items and add it via InputBox to my datatable table
     //which works fine and shows all added items
     private void CreateConnection()
     {
          objConnect = new DatabaseConnection();
          conString = Properties.Settings.Default.ItemsConnectionString;

          objConnect.connection_string = conString;
          objConnect.Sql = Properties.Settings.Default.SQL;

          dataSet = objConnect.GetConnection;
     }
     //I also have here code that show content of this DataTable table in 
     //DataGridView Form1.dataGridView

}

假设我单击 Form1 中的按钮,然后 Form2 将出现另一个 dataGridView

在这个表单中,正如我所说,我想要另一个 dataGridView 让我们称它为 dataGridV,它将显示与 Form1 中的 dataGridView 相同的项目,我应该怎么做?

这是我的代码,但它只显示空 table

Form2 : form
{
        DataTable table2;
        DatabaseConnection objConnect;
        string conString;
        DataSet dataSet;
        public DataGridV()
        {
            InitializeComponent();
            CreateConnection();
            CreateDataView();
        }


        private void CreateConnection()
        {
            objConnect = new DatabaseConnection();
            conString = Properties.Settings.Default.ItemsConnectionString;

            objConnect.connection_string = conString;
            objConnect.Sql = Properties.Settings.Default.SQL;

            dataSet = objConnect.GetConnection;
        }
        public void CreateDataView()
        {
            Form1 f = new Form1();
            table2 = f.TableBackpack;
            dataGridViewMix.DataSource = new DataView(tableBackpack);
        }

}

如果Form1负责打开Form2的实例,那么Form1应该将这个实例保存在私有字段中:

private Form2 form2 = new Form2();

然后,在 Form2 中创建一个 public 方法,允许 Form1 设置 table 字段(而不是 Form2 尝试拉取它来自 Form1,如您的代码示例中所示)。

public void SetTable(DataTable table)
{
  table2 = table;
  // Your code to fill DGV source with table2
}

Form1 中的用法可能如下所示:

form2.SetTable(this.table);
form2.ShowDialog();