Question

DataGridView 选择单元格改变行背景色

public Form1()
{
InitializeComponent();
setdgv();
}

public void setdgv()
{
DataTable dt = new DataTable();
dt.Columns.Add("name", typeof(string));
dt.Columns.Add("sex", typeof(string));
dt.Rows.Add("aa","man");
dt.Rows.Add("bb", "man");
dt.Rows.Add("cc", "man");
dt.Rows.Add("dd", "man");
dt.Rows.Add("ee", "man");
dt.Rows.Add("ff", "man");
dt.Rows.Add("gg", "man");
dt.Rows.Add("hh", "man");
dataGridView1.DataSource = dt;
}

//改变单元格背景
DataGridViewSelectedCellCollection dsc;
private void EcDataGridView_SelectionChanged(object sender, EventArgs e)
{
try
{
DataGridView dgv_c = (DataGridView)sender;
//上一次的选着
if (dsc != null)
{
for (int i = 0; i < dsc.Count; i++)
{
if (dsc[i].RowIndex >= 0)
dgv_c.Rows[dsc[i].RowIndex].DefaultCellStyle.BackColor = new Color();
}
}
//这次的选着
dsc = dgv_c.SelectedCells;
for (int i = 0; i < dgv_c.SelectedCells.Count; i++)
{
dgv_c.Rows[dgv_c.SelectedCells[i].RowIndex].DefaultCellStyle.BackColor = Color.SkyBlue;
}
}
catch (Exception) { return; }
}

自己写的代码。现在执行后全部行都变色了。请高人指点一下

Answer 1

看看代码就知道了，要在Form—load里面对dsc进行赋初值
注意添加Form1_Load事件
public Form1()
{
InitializeComponent();
setdgv();

}

public void setdgv()
{
DataTable dt = new DataTable();
dt.Columns.Add("name", typeof(string));
dt.Columns.Add("sex", typeof(string));
dt.Rows.Add("aa", "man");
dt.Rows.Add("bb", "man");
dt.Rows.Add("cc", "man");
dt.Rows.Add("dd", "man");
dt.Rows.Add("ee", "man");
dt.Rows.Add("ff", "man");
dt.Rows.Add("gg", "man");
dt.Rows.Add("hh", "man");
dataGridView1.DataSource = dt;
}

//改变单元格背景
DataGridViewSelectedCellCollection dsc;
private void EcDataGridView_SelectionChanged(object sender, EventArgs e)
{
try
{
DataGridView dgv_c = (DataGridView)sender;

//上一次的选着
if (dsc != null)
{
for (int i = 0; i < dsc.Count; i++)
{
if (dsc[i].RowIndex >= 0)
dgv_c.Rows[dsc[i].RowIndex].DefaultCellStyle.BackColor = new Color();
}
}
else
{
return;
}
//这次的选着
dsc = dgv_c.SelectedCells;
for (int i = 0; i < dgv_c.SelectedCells.Count; i++)
{
dgv_c.Rows[dgv_c.SelectedCells[i].RowIndex].DefaultCellStyle.BackColor = Color.SkyBlue;
}
}
catch (Exception) { return; }
}

private void Form1_Load(object sender, EventArgs e)
{
dsc = dataGridView1.SelectedCells;
}

Answer 2

设置CellClick就可以了，其实那条语句一起生效，之所以看不出来效果是因为，那一行处于选中状态，显示的是默认选择的颜色，当再点另外一行的时，就可以看出背景色已经改变了。
在代码之前添加：
if (e.ColumnIndex < 0 || e.RowIndex < 0)
return;
另外 click 后，被选中的单元格，还有个 SelectionBackColor 设置。

Answer 3

cell不是列吗，你不是要变row吗