C# 奇数/偶数 datagridview 行背景颜色
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Odd/Even datagridview rows background color
提问by Marek
I have datagridview and now I would like to change background color of its each row depending whether row number is even or odd.
我有 datagridview，现在我想根据行号是偶数还是奇数来更改其每一行的背景颜色。
I thought that there must be easier way to reach that. Then using for example this part of code and modify it so it would change the colours of dtg's row. If this snippet of code is one of the ways to do that, may someone help me to improve it so it wouldn't throw exception when index is out if rabge?
我认为必须有更简单的方法来实现这一目标。然后使用例如这部分代码并对其进行修改，以便更改 dtg 行的颜色。如果这段代码是这样做的方法之一，有人可以帮我改进它，这样它就不会在 rabge 的情况下在 index 出来时抛出异常吗？
public void bg_dtg()
{
try
{
for (int i = 0; i <= dataGridView1.Rows.Count ; i++)
{
if (IsOdd(i))
{
dataGridView1.Rows[i].DefaultCellStyle.BackColor = Color.LightBlue;
}
}
}
catch (Exception ex)
{
MessageBox.Show(""+ex);
}
}
public static bool IsOdd(int value)
{
return value % 2 != 0;
}
Thank you for your time and answers.
感谢您的时间和答案。
采纳答案by Adil
You are getting exception because you are accessing row that is not present. GridView rows are zero based index, it means if you have ten rows in grid the index will be from 0 to 9 and you should iterate one less then the rows count. The i <= dataGridView1.Rows.Countwill give exception on last iteration because when count is 10 (total rows are ten) and dataGridView1.Rows[10] does not exists therefore exception is thrown.
您正在访问异常，因为您正在访问不存在的行。GridView 行是从零开始的index，这意味着如果网格中有 10 行，则索引将从 0 到 9，您应该比行少迭代 1 行count。该i <= dataGridView1.Rows.Count会就最后一次迭代例外，因为当计数为10（总排十）和dataGridView1.Rows [10]不存在，因此抛出异常。
Change<= in loop condition to <
将循环条件中的 <=更改为 <
for (int i = 0; i <= dataGridView1.Rows.Count ; i++)
To
到
for (int i = 0; i < dataGridView1.Rows.Count ; i++)
You Should AlternatingRowsDefaultCellStyleproperty to set alternative row style to keep it simple and efficient.
您应该AlternatingRowsDefaultCellStyle属性来设置替代行样式以保持简单和高效。
回答by Colin Steel
There is a DataGridViewalternate row view style option in the forms designer. AlternatingRowsDefaultCellStylein the properties grid
DataGridView表单设计器中有一个备用行视图样式选项。AlternatingRowsDefaultCellStyle在属性网格中
回答by Rohit
You can use AlternatingRowsDefaultCellStyle
您可以使用 AlternatingRowsDefaultCellStyle
OR
或者
you can also do it manually
你也可以手动完成
foreach (DataGridViewRow row in dataGridView1.Rows)
if (row.Index % 2==0 )
{
row.DefaultCellStyle.BackColor = Color.Red;
}
回答by sarder kamruzzaman polash
you can try this code
你可以试试这个代码
for (int i = 0; i < GridView1.Rows.Count; i++) {
if (i % 2 == 0) {
GridView1.Rows[i].Cells[0].Style.BackColor = System.Drawing.Color.Green;
GridView1.Rows[i].Cells[1].Style.BackColor = System.Drawing.Color.Green;
}
else {
GridView1.Rows[i].Cells[0].Style.BackColor = System.Drawing.Color.Red;
GridView1.Rows[i].Cells[1].Style.BackColor = System.Drawing.Color.Red;
}
}
回答by Jaffer
AlternatingRowStyle-BackColor = "#C5C5C5"
We can directly add the code in the ASP grid
我们可以直接在ASP网格中添加代码
<asp:GridView ID="Gridview1" runat="server"
AlternatingRowStyle-BackColor = "#F3F3F3"
AutoGenerateColumns="true">
</asp:GridView>
