C# 如何在表单加载时删除所有DataGridView行?
如何删除除列标题之外的所有datagridview行 我试过:C# 如何在表单加载时删除所有DataGridView行?,c#,.net,winforms,datagridview,C#,.net,Winforms,Datagridview,如何删除除列标题之外的所有datagridview行 我试过: dataGridView1.Rows.clear(); 但它不起作用 我尝试在行上循环并使用RemoveAt方法,但它不会删除所有行: private void Form5_Load(object sender, EventArgs e) { dataGridView1.AutoGenerateColumns = true; SqlConnection con = new SqlConnection(
dataGridView1.Rows.clear();
但它不起作用
我尝试在行上循环并使用RemoveAt方法,但它不会删除所有行:
private void Form5_Load(object sender, EventArgs e)
{
dataGridView1.AutoGenerateColumns = true;
SqlConnection con = new SqlConnection(@"Data Source=.\myserver;Initial Catalog=test;Integrated Security=True");
adapter = new SqlDataAdapter("SELECT id as [#], description as [Description], unit as [Unit], amount as [Amount], unitPrice as [Unit Price], total as [Total] FROM tbl_poMaterials", con);
adapter.SelectCommand.CommandType = CommandType.Text;
DataTable tb = new DataTable();
adapter.Fill(tb);
SqlCommandBuilder builder = new SqlCommandBuilder(adapter);
dataGridView1.DataSource = tb;
dataGridView1.Columns[0].Width = 30;
dataGridView1.Columns[0].ReadOnly = true;
dataGridView1.Columns[1].Width = 660;
for (int i = 0; i < tb.Rows.Count; i++)
{
tb.Rows.RemoveAt(i);
}
}
如果网格绑定到DataTable或其他数据源,则需要清除它,而不是网格,否则Rows.clear方法是正确且最好的方法。需要清除数据源或DataTable,而不是datagridview
dataGridView.DataSource = null;
dataGridView.Refresh();
或
这对我很有用:
do
{
foreach (DataGridViewRow row in dataGridViewError.Rows)
{
try
{
dataGridViewError.Rows.Remove(row);
}
catch (Exception) { }
}
} while (dataGridViewError.Rows.Count > 1);
对于同一个问题,我尝试了几种方法,但都没有成功。正如其中一个答案所说:
for(int i = 0; i < myDataGridView.Rows.Count; i++)
{
myDataGridView.Rows.RemoveAt(i)
}
我用
在不删除列的情况下清除每行。//应该可以这样做
int rowCount = dtg.Rows.Count;
for (int i = rowCount - 1; i >= 0; i--)
{
DataGridViewRow dr = dtg.Rows[i];
dtg.Rows.Remove(dr);
}
int rowCount = dataGridView1.Rows.Count;
for (int i = 0; i < rowCount; i++)
{
dataGridView1.Rows.RemoveAt(0);
}
您的解决方案不起作用,因为每次for循环检查条件i}使行和列计数为零并刷新数据集
dataGrid.Rows.Count = 0;
dataGrid.Refresh 定义但不起作用,会发生什么?int i=0的可能重复;i
int rowCount = dtg.Rows.Count;
for (int i = rowCount - 1; i >= 0; i--)
{
DataGridViewRow dr = dtg.Rows[i];
dtg.Rows.Remove(dr);
}
int rowCount = dataGridView1.Rows.Count;
for (int i = 0; i < rowCount; i++)
{
dataGridView1.Rows.RemoveAt(0);
}
dataGrid.Rows.Count = 0;