C# 以编程方式循环遍历 DatagridView 并选中复选框
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Programatically loop through a DatagridView and check checkboxes
提问by
I have DataGridView bound by a datatable i have checkboxes to the same.
我有一个数据表绑定的 DataGridView 我有相同的复选框。
I want to navigate or loop through the the datagridview and check mark these checkboxes ,Below is the syntax i use .
我想在 datagridview 中导航或循环并选中这些复选框，下面是我使用的语法。
foreach(DataGridViewRow dr in dgvColumns.Rows)
{
DataGridViewCheckBoxCell checkCell =
(DataGridViewCheckBoxCell)dr.Cells["CheckBoxes"];
checkCell.Value=1;
//Also tried checkCell.Selected=true;
//Nothing seems to have worked.!
}
回答by Marc Gravell
If it is bound to a DataTable, can you not work on the model (the table) instead? The DataGridViewis a view...
如果它绑定到 a DataTable，你不能在模型（表）上工作吗？这DataGridView是一个视图...
Try looping over the rows in the table, setting the values. For example (below) - note that I don't update the DataGridView- just the DataTable:
尝试遍历表中的行，设置值。例如（下面） - 请注意，我不更新DataGridView- 只是DataTable：
using System;
using System.Data;
using System.Windows.Forms;
static class Program
{
[STAThread]
static void Main()
{
DataTable table = new DataTable();
table.Columns.Add("Name", typeof(string));
table.Columns.Add("Selected", typeof(bool));
table.Rows.Add("Fred", false);
table.Rows.Add("Jo", false);
table.Rows.Add("Andy", true);
Button btn = new Button();
btn.Text = "Select all";
btn.Dock = DockStyle.Bottom;
btn.Click += delegate
{
foreach (DataRow row in table.Rows)
{
row["Selected"] = true;
}
};
DataGridView grid = new DataGridView();
grid.Dock = DockStyle.Fill;
grid.DataSource = table;
Form form = new Form();
form.Controls.Add(grid);
form.Controls.Add(btn);
Application.Run(form);
}
}
回答by Justin Bannister
Something along the lines of:
类似的东西：
foreach(DataGridViewRow dgvr in dgvColumns.Rows)
{
// Get the underlying datarow
DataRow dr = ((DataRowView)dgvr.DataBoundItem).Row;
// Update the appropriate column in the data row.
// Assuming this is your column name in your
// underlying data table
dr["CheckBoxes"] = 1;
}
回答by Justin Bannister
The following worked for me, it checked the checkboxes perfectly :)
以下对我有用，它完美地检查了复选框:)
foreach (DataGridViewRow row in dgvDataGridView.Rows)
{
((DataGridViewCheckBoxCell)row.Cells[0]).Value = true;
}
回答by Arv
the row that is selected its value do not get passed to the underlying datasource so do not get saved. the datasource is Datatable. Its problemof datagridview.
选择其值的行不会传递到基础数据源，因此不会保存。数据源是Datatable。它的datagridview的问题。
回答by Duncan Carr
using System.Collections.Generic;
using System.Windows.Forms;
namespace FindTheCheckedBoxes
{
public partial class Form1 : Form
{
List<TestObject> list = new List<TestObject>();
List<int> positionId = new List<int>();
public Form1()
{
InitializeComponent();
PopulateDataGrid();
foreach (DataGridViewRow row in dataGridView1.Rows)
{
if ((bool)row.Cells[0].Value == true)
positionId.Add((int)row.Cells[1].Value);
}
// sets the window title to the columns found ...
this.Text = string.Join(", ", positionId);
}
void PopulateDataGrid()
{
list.Add(new TestObject { tick = false, LineNum = 1 });
list.Add(new TestObject { tick = true, LineNum = 2 });
list.Add(new TestObject { tick = false, LineNum = 3 });
list.Add(new TestObject { tick = true, LineNum = 4 });
dataGridView1.DataSource = list;
}
}
class TestObject
{
public bool tick { get; set; }
public int LineNum { get; set; }
}
}
This looks like it does what you require. I'm new to all this so sorry if I have answered incorrectly. Just trying to help.
这看起来像你需要的那样。我对这一切都很陌生，如果我回答不正确，我很抱歉。只是想帮忙。
