我有一个绑定到数据表的datagridview。列不是自动生成的,我在代码中创建它们。我希望我的用户能够添加和删除一行,所以我有AllowUserToAddRows = true,AllowUserToDeleteRows = true。
问题是:当他们选择一行并按DEL时,信息将被行单元格的默认值替换。这一行不会消失。
这种行为是什么(为什么/发生了什么),以及如何解决这个问题?
这是我的网格创建代码:
private void resetDowntimeGrid()
{
downtimeEntries = new DataTable();
downtimeEntries.Columns.Add("Category", typeof(int));
downtimeEntries.Columns.Add("HoursDown");
downtimeEntries.Columns.Add("Reason");
//deptDowntimeCategories.Select("", "ListOrder ASC");
gridDowntime.Columns.Clear();
DataGridViewComboBoxColumn cboCategory = new DataGridViewComboBoxColumn();
{
cboCategory.HeaderText = "Category";
cboCategory.DataSource = deptDowntimeCategories;
cboCategory.DisplayMember = "Name";
cboCategory.ValueMember = "CategoryID";
cboCategory.DataPropertyName = "Category";
cboCategory.Width = Convert.ToInt16(gridDowntime.Width * 0.20);
cboCategory.DisplayStyle = DataGridViewComboBoxDisplayStyle.ComboBox;
cboCategory.AutoComplete = true;
gridDowntime.Columns.Add(cboCategory);
}
DataGridViewTextBoxColumn txtDowntime = new DataGridViewTextBoxColumn();
txtDowntime.HeaderText = "HoursDown";
txtDowntime.DataPropertyName = "HoursDown";
txtDowntime.Width = Convert.ToInt16(gridDowntime.Width * 0.15);
gridDowntime.Columns.Add(txtDowntime);
DataGridViewTextBoxColumn txtReason = new DataGridViewTextBoxColumn();
txtReason.HeaderText = "Reason";
txtReason.DataPropertyName = "Reason";
txtReason.Width = Convert.ToInt16(gridDowntime.Width * 0.60);
gridDowntime.Columns.Add(txtReason);
gridDowntime.DataSource = downtimeEntries;
lblStatus.Text = "Downtime grid reset.";
}
答案 0 :(得分:6)
我创建了一个空的winform并将网格代码放入其中。区别在于我如何设置DataGridView.EditMode
。我有= EditOnEnter
,但如果我设置= EditOnKeystroke.
答案 1 :(得分:1)
以下是我使用部分代码执行的快速示例,减去了两列。我无法复制你的问题。您可能想验证您实际上是在选择一个值,单击下拉列表中的值,然后单击“删除”。 (在这种情况下,我只是将DataGridView
从工具箱拖到表单中。我没有做任何其他修改。)
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
DataTable myTable = new DataTable("MyTable");
myTable.Columns.Add("CategoryID", typeof(int));
myTable.Columns.Add("CategoryName", typeof(string));
myTable.Rows.Add(new object[] { 1, "Small" });
myTable.Rows.Add(new object[] { 2, "Medium" });
myTable.Rows.Add(new object[] { 3, "Large" });
DataGridViewComboBoxColumn cboCategory = new DataGridViewComboBoxColumn();
cboCategory.HeaderText = "Category";
cboCategory.DataSource = myTable;
cboCategory.DisplayMember = "CategoryName";
cboCategory.ValueMember = "CategoryID";
cboCategory.DataPropertyName = "Category";
cboCategory.Width = Convert.ToInt16(dataGridView1.Width * 0.20);
cboCategory.DisplayStyle = DataGridViewComboBoxDisplayStyle.ComboBox;
cboCategory.AutoComplete = true;
dataGridView1.Columns.Add(cboCategory);
}
}
答案 2 :(得分:0)
点击Delete不会删除行的另一个原因是,如果您将RowHeadersVisible
属性设置为False,因此在最左侧的列中没有显示*
。修复此问题后,@ MAW74656的解决方案对我有用。