我已经创建了一个显示带有一系列问题的datagridview的应用程序。dgv结构由一个用于问题文本的字符串列和三个用于答案的布尔/复选框列组成(是,否,不适用)。每个问题都显示在其自己的行上。
我希望我的程序仅允许用户在每一行上选择是,仅否或不适用。
我认为当一个选项被选中但我不太确定如何执行此操作时,我需要取消选中其他复选框选项。
我已经设置了CellValueChanged和CellContentClick事件,但是我不确定代码是否需要实现所需的功能。
任何帮助表示赞赏。谢谢。
我到目前为止的代码:
private void dgvQuestions_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
int columnIndex = e.ColumnIndex;
int rowIndex = e.RowIndex;
DataGridViewCheckBoxCell chkYes = dgvQuestions.Rows[rowIndex].Cells[2] as DataGridViewCheckBoxCell;
DataGridViewCheckBoxCell chkNo = dgvQuestions.Rows[rowIndex].Cells[3] as DataGridViewCheckBoxCell;
DataGridViewCheckBoxCell chkNA = dgvQuestions.Rows[rowIndex].Cells[4] as DataGridViewCheckBoxCell;
if (Convert.ToBoolean(chkYes.Value) == true)
{
}
if (Convert.ToBoolean(chkNo.Value) == true)
{
}
if (Convert.ToBoolean(chkNA.Value) == true)
{
}
}
private void dgvQuestions_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
dgvQuestions.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
this video是否显示您想要的行为?对我有用的是使用BindingList作为DataGridView的数据源。然后,使用复选框更改时发生的“ CellDirty”事件,可以使它们像单选按钮一样工作。
这是一个代表调查表的一个订单项的类的示例:
class QuestionaireItem
{
public string Question { get; internal set; } = "Question " + _count++;
public bool Yes { get; set; }
public bool No { get; set; }
public bool Maybe { get; set; } // OOPS! I should have said "NA"
static int _count = 1;
}
当主窗体获得其Handle之前(在此之前将不起作用),我们初始化dataGridView1。我已添加评论以解释发生了什么:
protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
if (!DesignMode) // We only want this behavior at runtime
{
// Create the binding list
BindingList<QuestionaireItem> testdata = new BindingList<QuestionaireItem>();
// And add 5 example items to it
for (int i = 0; i < 5; i++) testdata.Add(new QuestionaireItem());
// Now make this list the DataSource of the DGV.
dataGridView1.DataSource = testdata;
// This just formats the column widths a little bit
dataGridView1.Columns["Question"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
dataGridView1.Columns["Maybe"].Width =
dataGridView1.Columns["Yes"].Width =
dataGridView1.Columns["No"].Width = 40;
// And this subscribes to the event (one of them anyway...)
// that will fire when the checkbox is changed
dataGridView1.CurrentCellDirtyStateChanged += DataGridView1_CurrentCellDirtyStateChanged;
}
}
这里是处理CellDirty事件的方法,以使三个复选框(我分别将它们命名为Yes,No和Maybe)的作用类似于单选按钮:
private void DataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
// The cell will be considered "dirty" or modified so Commit first.
dataGridView1.EndEdit(DataGridViewDataErrorContexts.Commit);
// Get the QuestionaireItem that is bound to the row
QuestionaireItem item = (QuestionaireItem)
dataGridView1
.Rows[dataGridView1.CurrentCell.RowIndex]
.DataBoundItem;
// Now see which column changed:
switch (dataGridView1.Columns[dataGridView1.CurrentCell.ColumnIndex].Name)
{
case "Yes":
item.No = false; // i.e. "unchecked"
item.Maybe = false;
break;
case "No":
item.Yes = false;
item.Maybe = false;
break;
case "Maybe":
item.Yes = false;
item.No = false;
break;
}
dataGridView1.Refresh(); // Update the binding list to the display
}
Clone or Download此示例来自GitHub。
[您似乎已经正确设置了CellContentClick
,但是,如果网格中还有其他列,那么,如果要检查以确保单击了其内容的单元格实际上是检查之一,则可能会很有用。盒单元格。否则,代码可能会不必要地设置单元格的值。
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e) {
string colName = dataGridView1.Columns[e.ColumnIndex].Name;
if (colName == "Yes" || colName == "No" || colName == "N/A") {
dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
}
在CellValueChanged
事件中,代码再次应仅检查复选框值。另外,我假设必须检查至少一(1)个单元格。例如,如果最初选中“ N / A”单元格,则用户“取消选中”该单元格,则该行将没有选中“ NO”复选框。这是代码中的最后检查,如果用户“取消选中”“ N / A”单元格,而所有复选框都保持“未选中”,则代码将“选中”“ N / A”单元格。同样,重要的是在我们更改CellValueChanged
事件中的任何复选框值之前“关闭” CellValueChanged
事件,以避免重入。有点像...
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e) {
if (e.RowIndex >= 0 && e.ColumnIndex >= 0) {
string colName = dataGridView1.Columns[e.ColumnIndex].Name;
bool checkValue;
dataGridView1.CellValueChanged -= new DataGridViewCellEventHandler(this.dataGridView1_CellValueChanged);
switch (colName) {
case "Yes":
checkValue = (bool)dataGridView1.Rows[e.RowIndex].Cells["Yes"].Value;
if (checkValue == true) {
dataGridView1.Rows[e.RowIndex].Cells["No"].Value = false;
dataGridView1.Rows[e.RowIndex].Cells["N/A"].Value = false;
}
else {
dataGridView1.Rows[e.RowIndex].Cells["N/A"].Value = true;
}
break;
case "No":
checkValue = (bool)dataGridView1.Rows[e.RowIndex].Cells["No"].Value;
if (checkValue == true) {
dataGridView1.Rows[e.RowIndex].Cells["Yes"].Value = false;
dataGridView1.Rows[e.RowIndex].Cells["N/A"].Value = false;
}
else {
dataGridView1.Rows[e.RowIndex].Cells["N/A"].Value = true;
}
break;
case "N/A":
checkValue = (bool)dataGridView1.Rows[e.RowIndex].Cells["N/A"].Value;
if (checkValue == true) {
dataGridView1.Rows[e.RowIndex].Cells["Yes"].Value = false;
dataGridView1.Rows[e.RowIndex].Cells["No"].Value = false;
}
else {
if ((bool)dataGridView1.Rows[e.RowIndex].Cells["Yes"].Value == false &&
(bool)dataGridView1.Rows[e.RowIndex].Cells["Yes"].Value == false) {
dataGridView1.Rows[e.RowIndex].Cells["N/A"].Value = true;
}
}
break;
default:
break;
}
dataGridView1.CellValueChanged += new DataGridViewCellEventHandler(this.dataGridView1_CellValueChanged);
}
下面是一个简单的示例,其中包含三列“是”,“否”和“不适用”复选框。
public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { dataGridView1.DataSource = GetTable(); } private DataTable GetTable() { DataTable dt = new DataTable(); dt.Columns.Add("Yes", typeof(bool)); dt.Columns.Add("No", typeof(bool)); dt.Columns.Add("N/A", typeof(bool)); for (int i = 0; i < 10; i++) { dt.Rows.Add(false, false, true); } return dt; }
希望这会有所帮助。