C# 将数据网格视图背景设置为透明
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/1330220/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Set datagrid view background to transparent
提问by Moon
I tried to set the background color of a data grid view to be "transparent" from properties but it it said "not a valid property".
我试图将数据网格视图的背景颜色设置为从属性“透明”，但它说“不是有效属性”。
How can I do it?
我该怎么做？
采纳答案by RJardines
I did this solution to a specific problem (when the grid was contained in a form with background image) with simples modifications you can adapt it to create a generic transparent Grid, just ask if the parent have background image, else just use the parent backcolor to paint your grid, and that is all.
我对一个特定的问题（当网格包含在带有背景图像的表单中时）做了这个解决方案，通过简单的修改，你可以调整它来创建一个通用的透明网格，只需询问父级是否有背景图像，否则只需使用父级背景色绘制您的网格，仅此而已。
You must inherit from DataGridView and override the PaintBackground method like this:
您必须从 DataGridView 继承并覆盖 PaintBackground 方法，如下所示：
protected override void PaintBackground(Graphics graphics, Rectangle clipBounds, Rectangle gridBounds)
{
base.PaintBackground(graphics, clipBounds, gridBounds);
Rectangle rectSource = new Rectangle(this.Location.X, this.Location.Y, this.Width, this.Height);
Rectangle rectDest = new Rectangle(0, 0, rectSource.Width, rectSource.Height);
Bitmap b = new Bitmap(Parent.ClientRectangle.Width, Parent.ClientRectangle.Height);
Graphics.FromImage(b).DrawImage(this.Parent.BackgroundImage, Parent.ClientRectangle);
graphics.DrawImage(b, rectDest, rectSource, GraphicsUnit.Pixel);
SetCellsTransparent();
}
public void SetCellsTransparent()
{
this.EnableHeadersVisualStyles = false;
this.ColumnHeadersDefaultCellStyle.BackColor = Color.Transparent;
this.RowHeadersDefaultCellStyle.BackColor = Color.Transparent;
foreach (DataGridViewColumn col in this.Columns)
{
col.DefaultCellStyle.BackColor = Color.Transparent;
col.DefaultCellStyle.SelectionBackColor = Color.Transparent;
}
}
回答by choudeshell
You need to set all the rows and columns to transparent. Easier way is:
您需要将所有行和列设置为透明。更简单的方法是：
for (int y = 0; y < gridName.Rows[x].Cells.Count; y++)
{
yourGridName.Rows[x].Cells[y].Style.BackColor =
System.Drawing.Color.Transparent;
}
回答by tanzer
Set datagridview's backcolor same with the form's color. To do this, select datagridview: go to Properties -> RowTemplate -> DefaultCellStyle -> BackColor and choose the color of your form.
将 datagridview 的背景色设置为与表单的颜色相同。为此，选择 datagridview：转到 Properties -> RowTemplate -> DefaultCellStyle -> BackColor 并选择表单的颜色。
回答by letsdance
i did this with Deumber's solution and it works, but causes some troubles that i avoided by adding small improvements:
我使用 Deumber 的解决方案做到了这一点并且它有效，但会导致一些我通过添加小的改进避免的麻烦：
A. scrolling the DGV messes up the background. solution: put this somewhere:
A. 滚动 DGV 会弄乱背景。解决方案：把它放在某个地方：
public partial class main : Form
{
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x02000000;
return cp;
}
}
}
the background will still scroll, but be corrected immediately after each scroll step. it's noticeable, but was acceptable for me. does anyone know a better solution to support scrolling with this?
背景仍将滚动，但在每个滚动步骤后立即更正。这很明显，但对我来说是可以接受的。有谁知道更好的解决方案来支持滚动？
B. the designer has troubles using it. solution:
B. 设计者在使用时遇到麻烦。解决方案：
protected override void PaintBackground(Graphics graphics, Rectangle clipBounds, Rectangle gridBounds)
{
base.PaintBackground(graphics, clipBounds, gridBounds);
if (main.ActiveForm != null && this.Parent.BackgroundImage != null)
{
Rectangle rectSource = new Rectangle(this.Location.X, this.Location.Y, this.Width, this.Height);
Rectangle rectDest = new Rectangle(-3, 3, rectSource.Width, rectSource.Height);
Bitmap b = new Bitmap(Parent.ClientRectangle.Width, Parent.ClientRectangle.Height);
Graphics.FromImage(b).DrawImage(this.Parent.BackgroundImage, Parent.ClientRectangle);
graphics.DrawImage(b, rectDest, rectSource, GraphicsUnit.Pixel);
SetCellsTransparent();
}
}
now the designer treats it just like a DGV. it will fail if you ever want to draw the DGV while you have no ActiveForm, but that's not the case usually. it's also possible to just keep the if-line while you might still want to use the designer, and delete it for the release.
现在设计师把它当作DGV。如果您想在没有 ActiveForm 的情况下绘制 DGV，它将失败，但通常情况并非如此。也可以只保留 if 行，而您可能仍想使用设计器，并在发布时将其删除。
回答by Larry
Having a transparent color in the DataGridView BackGroundColor property is not possible.
在 DataGridView BackGroundColor 属性中具有透明颜色是不可能的。
So I decided to sync this property with the parent's BackColor. The good old databinding feature of WinForms is very good at this :
所以我决定将此属性与父级的 BackColor 同步。WinForms 的旧数据绑定功能非常擅长：
myDataGridView.DataBindings.Add(nameof(DataGrid.BackgroundColor),
this,
nameof(Control.BackColor));
Just after InitializeComponents();
刚过 InitializeComponents();
I know this is pretty old, but this works very well.
我知道这已经很老了，但这非常有效。
