如何从datagridview和数据库中删除选定的行

我们的想法是，删除时选择的行将从datagridview，数据库中删除，然后datagridview将被刷新。 我假设它必须用SQL完成，但是如何将类型为text的sqlcommand与该特定行的删除代码相关联？ 数据库由一个表组成，数据网格绑定到该表。

删除按钮：

private void btnBookRecord_Click(object sender, EventArgs e) { if (this.BooksGrid.SelectedRows.Count > 0) { foreach (DataGridViewRow dgvrCurrent in BooksGrid.SelectedRows) { if (dgvrCurrent == BooksGrid.CurrentRow) { BooksGrid.CurrentCell = null; } // Delete row code here } } } 

Answer 1

由于某种原因，即使我从添加按钮复制了刷新代码，datagridview也不会更新。 但它确实从数据库中删除了记录。

 private void deleteRecord() { if (BooksGrid.SelectedRows.Count > 0) { int selectedIndex = BooksGrid.SelectedRows[0].Index; int rowID = int.Parse(BooksGrid[0, selectedIndex].Value.ToString()); string sql = "DELETE FROM Table1 WHERE RowID = @RowID"; SqlCommand deleteRecord = new SqlCommand(); deleteRecord.Connection = Booksconnection; deleteRecord.CommandType = CommandType.Text; deleteRecord.CommandText = sql; SqlParameter RowParameter = new SqlParameter(); RowParameter.ParameterName = "@RowID"; RowParameter.SqlDbType = SqlDbType.Int; RowParameter.IsNullable = false; RowParameter.Value = rowID; deleteRecord.Parameters.Add(RowParameter); deleteRecord.Connection.Open(); deleteRecord.ExecuteNonQuery(); deleteRecord.Connection.Close(); booksDataset1.GetChanges(); sqlDataAdapter1.Fill(booksDataset1.Videos); } } 

Answer 2

如果只允许在DataGridView中进行一次选择，则可以执行此操作。

假设DataGridView中的第一列是数据库中行的标识种子。

 if (BooksGrid.SelectedRows.Count > 0) { int selectedIndex = BooksGrid.SelectedRows[0].Index; // gets the RowID from the first column in the grid int rowID = int.Parse(BooksGrid[0, selectedIndex].Value.ToString()); string sql = "DELETE FROM Table1 WHERE RowID = @RowID"; // your code for deleting it from the database // then your code for refreshing the DataGridView } 

Answer 3

 DataGridView datagridview1; datagridview1.Rows.remove(datagridview1.SelectedRows[0]);