我想在listview中添加项目,我面临的问题是当我在文本框中添加我输入的项目时。它能够在我想要的listview列中插入值。但是当它更新时,它从文本文件加载的所有数据都将丢失。只留下我输入的值。
在添加数据之前: http://www.hostpic.org/images/1508121529460086.png
插入数据后: http://www.hostpic.org/images/1508121531010086.png
private void button2_Click(object sender, EventArgs e)
{
//add button
string s;
listView1.Items.Clear();
listView1.BeginUpdate();
for (int i = 0; i < comboBox1.Items.Count; i++)
{
if ((comboBox1.SelectedIndex + 1) + "" == proDetail[i].id)
{
//proDetail[i].estimation = double.Parse(textBox3.Text);
proDetail[i].estimation = textBox3.Text;
s = textBox4.Text;
proDetail[i].pre = s.Split(',');
}
}
for (int j = 0; j < comboBox1.Items.Count; j++)
{
if (proDetail[j].pre != null)
{
project = listView1.Items.Add(proDetail[j].id);
project.SubItems.Add(proDetail[j].activity);
if (proDetail[j].pre.Length <= 1)
{
foreach (string words in proDetail[j].pre)
{
preValue = words;
}
}
else
{
preValue = string.Empty;
foreach (string words in proDetail[j].pre)
{
preValue += words + ",";
}
}
project.SubItems.Add(proDetail[j].estimation.ToString());
project.SubItems.Add(preValue);
}
else
{
project = listView1.Items.Add(proDetail[j].id);
project.SubItems.Add(proDetail[j].activity);
}
listView1.EndUpdate();
listView1.Refresh();
}
}
答案 0 :(得分:1)
我忘了包括 project.SubItems.Add(proDetail [j]的.estimation);
答案 1 :(得分:0)
这是罪魁祸首:
listView1.Items.Clear();
已删除控件中的所有现有项目。