C# datagridview 问题

[zhiyi_zhou001]

请问

Form1
private void button1_Click(object sender, EventArgs e)
{
Form1 f1 = new Form1();
f1.ShowDialog();
cla = f1.CLA;

dcop();
}

private void dcop()
{

for (int i = 0; i < cla.Count; i++)
{
dataGridView1.Rows.Add();
dataGridView1.Rows[i].Cells[0].Value = cla[i].商品类型;
dataGridView1.Rows[i].Cells[1].Value = cla[i].商品编码;
dataGridView1.Rows[i].Cells[2].Value = cla[i].商品名称;
dataGridView1.Rows[i].Cells[3].Value = cla[i].规格型号;
dataGridView1.Rows[i].Cells[4].Value = cla[i].单位;
dataGridView1.Rows[i].Cells[5].Value = cla[i].价格;
dataGridView1.Rows[i].Cells[6].Value = cla[i].数量;
dataGridView1.Rows[i].Cells[7].Value = cla[i].价格;

}

}


Form2
public List<DallClass1> CLA { get { return cla; } set { cla = value; } }
private void button1_Click(object sender, EventArgs e)
{
cla = new List<DallClass1>();

for (int i = 0; i < dataGridView2.Rows.Count; i++)
{
if ((bool)dataGridView2.Rows[i].Cells[0].EditedFormattedValue == true)
{
DallClass1 dc = new DallClass1();
dc.商品类型 = dataGridView2.Rows[i].Cells[2].Value.ToString();
dc.商品编码 = dataGridView2.Rows[i].Cells[3].Value.ToString();

dc.商品名称 = dataGridView2.Rows[i].Cells[4].Value.ToString();
dc.规格型号 = dataGridView2.Rows[i].Cells[5].Value.ToString();

dc.单位 = dataGridView2.Rows[i].Cells[6].Value.ToString();
dc.价格 = dataGridView2.Rows[i].Cells[7].Value.ToString();
CLA.Add(dc);
}
}
this.Close();
}


为什么Form1第二次接收Form2传的值会把Form2第一次传的值给覆盖了

[shighui]

你每次都new 一个Form1，所以你第二次传过来的值并没有放到第一次的那个Form1中去，而是放到新new 的Form1中去了。

[纵横宇宙]

你的 CLA 是个引用对象来的，当然会覆盖了

[llszn]

for (int i = 0; i < cla.Count; i++)
{
dataGridView1.Rows.Add();
dataGridView1.Rows[i].Cells[0].Value = cla[i].商品类型;
dataGridView1.Rows[i].Cells[1].Value = cla[i].商品编码;
dataGridView1.Rows[i].Cells[2].Value = cla[i].商品名称;
dataGridView1.Rows[i].Cells[3].Value = cla[i].规格型号;
dataGridView1.Rows[i].Cells[4].Value = cla[i].单位;
dataGridView1.Rows[i].Cells[5].Value = cla[i].价格;
dataGridView1.Rows[i].Cells[6].Value = cla[i].数量;
dataGridView1.Rows[i].Cells[7].Value = cla[i].价格;

}

每一次，i都从0开始。所以....

[shighui]

for循环错了，不应该从第0行开始
dataGridView1.Rows.Add();
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[0].Value = cla[i].商品类型;
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[1].Value = cla[i].商品编码;
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[2].Value = cla[i].商品名称;
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[3].Value = cla[i].规格型号;
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[4].Value = cla[i].单位;
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[5].Value = cla[i].价格;
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[6].Value = cla[i].数量;
dataGridView1.Rows[dataGridView1.Rows.Count-1].Cells[7].Value = cla[i].价格;

[DGTGDDD]

对 就是for 循环 索引值错了 每次都从 0 开始 当然要被覆盖哦

楼上 shiguohui000的写法正确

[zhiyi_zhou001]

[Quote=引用 4 楼 llszn 的回复:]
for (int i = 0; i < cla.Count; i++)
{
dataGridView1.Rows.Add();
dataGridView1.Rows[i].Cells[0].Value = cla[i].商品类型;
dataGridView1.Rows[i].Cells[1].Value = cla[i].商品编码;
dataGridView1.Row……
[/Quote]
那应该怎么办？

[llszn]

for (int i = 0; i < cla.Count; i++)
{
int rindex=dataGridView1.Rows.Add();
dataGridView1.Rows[rindex].Cells[0].Value = cla[i].商品类型;
dataGridView1.Rows[rindex].Cells[1].Value = cla[i].商品编码;
dataGridView1.Rows[rindex].Cells[2].Value = cla[i].商品名称;
dataGridView1.Rows[rindex].Cells[3].Value = cla[i].规格型号;
dataGridView1.Rows[rindex].Cells[4].Value = cla[i].单位;
dataGridView1.Rows[rindex].Cells[5].Value = cla[i].价格;
dataGridView1.Rows[rindex].Cells[6].Value = cla[i].数量;
dataGridView1.Rows[rindex].Cells[7].Value = cla[i].价格;

}