隐藏 DataGridView 网格线

Question

我已经看到this 的问题，并将CellBorderStyle 设置为None，但由于某种原因，我的DataGridView 上仍有网格线：

这是我用来初始化控件的代码：

public FtpTransferGridView()
{
    this.AutoGenerateColumns = false;
    this.DoubleBuffered = true;
    this.ReadOnly = true;
    this.AllowUserToAddRows = false;
    this.AllowUserToDeleteRows = false;
    this.AllowUserToResizeRows = false;
    this.ShowEditingIcon = false;
    this.RowHeadersVisible = false;
    this.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
    this.AlternatingRowsDefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(240, 240, 225);
    this.RowTemplate.Height = 20;
    this.CellBorderStyle = DataGridViewCellBorderStyle.None;
    this.BackgroundColor = System.Drawing.SystemColors.Window;

    InitializeColumns();
}

我在这里错过了什么？

Answer 1

问题与自定义绘制的进度列单元格有关。

在它的单元格绘制方法中，我的代码类似于：

base.Paint(g, ...);
g.SmoothingMode = SmoothingMode.HighQuality;
if (value <= 0) return;

//paint the progress bar

g.SmoothingMode = SmoothingMode.None;

当方法退出而不绘制进度条时会发生错误，从而使图形平滑模式处于错误状态。

只有在value <= 0检查解决问题后才能设置Graphics的SmoothingMode：

base.Paint(g, ...);
if (value <= 0) return;
g.SmoothingMode = SmoothingMode.HighQuality;

//paint the progress bar

g.SmoothingMode = SmoothingMode.None;