vb.net – 如何在运行时在DatagridView的DatagridViewComboboxColumn中添加Items

我有一个包含三列的datagridview,使用Datareader填充. datagridView中有一个DatagridViewComboboxcolumn.

我希望这个DatagridViewComboboxcolumn也应该使用datareader填充.

请建议如何使用Datareader将项添加到DatagridViewComboboxcolumn.
以下是我尝试过的代码.

这里的博士是SqlDatareader

Datagridview.Rows.Add(dr("Column1").ToString, dr("Column2"),dr("DatagridViewComboboxcolumn "))

但是,当我添加这种方式我在DatagridViewComboboxcolumn列上获取错误.
请建议

如前所述,您无法将DataGridViewColumn的DataSource设置为DataReader(因为这是一个仅向前的数据库连接对象).但是你可以做的是填充DataTable并将DataGridViewColumn上的DataSource设置为此DataTable.您还需要设置DataPropertyName(这是DataGridView的数据源的列名),ValueMemeber和DisplayMember.下面的示例使用Adventureworks DB并使用4列填充DataGridView(其中一列是组合框 – ProductIdCombo).只需创建一个表单,在其上放一个名为DataGridView1的DataGridGridView控件并运行以下命令. ProductId列演示绑定到组合(ProductIdCombo列)的基础列确实更新了dtProductsInventory DataTable中的ProductId字段.

Dim dtProductInventory As New System.Data.DataTable
        Dim dtProducts As New System.Data.DataTable

        Using objSqlServer As New System.Data.SqlClient.SqlConnection("Server=LOCALHOST\SQLEXPRESS; Integrated Security=SSPI;Initial Catalog=AdventureWorks")
            objSqlServer.Open()
            Dim sqlCmd As New System.Data.SqlClient.SqlCommand("select * from production.ProductInventory", objSqlServer)
            dtProductInventory.Load(sqlCmd.ExecuteReader)
            sqlCmd.CommandText = "Select * from production.product"
            dtProducts.Load(sqlCmd.ExecuteReader)
        End Using

        DataGridView1.AutoGenerateColumns = False
        DataGridView1.DataSource = dtProductInventory

        Dim colProductIdCombo As New System.Windows.Forms.DataGridViewComboBoxColumn()
        colProductIdCombo.DataSource = dtProducts
        colProductIdCombo.DisplayMember = "Name"
        colProductIdCombo.ValueMember = "ProductId"
        colProductIdCombo.DataPropertyName = "ProductId"
        colProductIdCombo.HeaderText = "ProductIdCombo"
        DataGridView1.Columns.Add(colProductIdCombo)

        Dim colProductId As New System.Windows.Forms.DataGridViewTextBoxColumn()
        colProductId.DataPropertyName = "ProductId"
        colProductId.HeaderText = "ProductId"
        DataGridView1.Columns.Add(colProductId)

        Dim colShelf As New System.Windows.Forms.DataGridViewTextBoxColumn()
        colShelf.DataPropertyName = "Shelf"
        colShelf.HeaderText = "Shelf"
        DataGridView1.Columns.Add(colShelf)

        Dim colQuantity As New System.Windows.Forms.DataGridViewTextBoxColumn()
        colQuantity.DataPropertyName = "Quantity"
        colQuantity.HeaderText = "Quantity"
        DataGridView1.Columns.Add(colQuantity)