C# Listview 不同 colors 行和列

Question

我試圖在列表視圖上添加不同的 colors 行和列。

我想喜歡這個

這是第一個列表視圖

首先我使用了這些代碼

foreach (ListViewItem item in listView.Items)
{
   item.BackColor = item.Index % 2 == 0 ? Color.FromArgb(70, 70, 70) : Color.FromArgb(61, 61, 61);
}

然后像這樣顯示的列表視圖

然后我嘗試了這些代碼：

foreach (ListViewItem item in listView.Items)
{
   item.SubItems[2].BackColor = Color.FromArgb(18, 64, 100);
   item.SubItems[9].BackColor = Color.FromArgb(105, 16, 38);
   item.UseItemStyleForSubItems = false;
}

安德最后一個列表視圖是這樣顯示的

怎么了？

謝謝你。

Answer 1

當您應用交替行 colors 時，您僅將其應用於第 1 列（也稱為item ）。 當您應用列 [2 和 9] 格式時，您關閉UseItemStyleForSubItems ，因此現在只有第一列帶有交替行 colors。您必須將交替行和列格式代碼組合到一個代碼塊中，如下所示：

foreach (ListViewItem item in listView.Items)
{
    //Disable item styles for sub items so we can apply column colors.
    item.UseItemStyleForSubItems = false;

    //Create the main colors used for row formatting.
    Color a = Color.FromArgb(61, 61, 61);
    Color b = Color.FromArgb(70, 70, 70);

    //Create the alternate colors used for column 2 and 9.
    Color alt2 = Color.FromArgb(18, 64, 100);
    Color alt9 = Color.FromArgb(105, 16, 38);

    //Apply colors to column 1
    if (item.Index % 2 == 0) {
        item.BackColor = b;
    } else {
        item.BackColor = a;
    }
    
    //Loop through the sub items and apply colors.
    foreach(ListViewSubItem sub in item.SubItems) {
        if (sub.Index == 2) {             //Apply column 2 color.
            sub.BackColor = alt2;
        } else if (sub.Index == 9) {      //Apply column 9 color.
            sub.BackColor = alt9;         
        } else if (item.Index % 2 == 0) { //Apply alt row color.
            sub.BackColor = b;            
        } else {                          //Apply main row color. This is the default.
            sub.BackColor = a;            
        }
    }
}

Answer 2

我用這個代碼做了。

                foreach (ListViewItem item in listView.Items)
            {
                //Disable item styles for sub items so we can apply column colors.
                item.UseItemStyleForSubItems = false;

                //Create the main colors used for row formatting.
                Color a = Color.FromArgb(61, 61, 61);
                Color b = Color.FromArgb(70, 70, 70);

                //Create the alternate colors used for column 2 and 9.
                Color alt2 = Color.FromArgb(18, 64, 100);
                Color alt9 = Color.FromArgb(105, 16, 38);

                //Apply colors to column 1
                if (item.Index % 2 == 0)
                {
                    item.BackColor = b;
                }
                else
                {
                    item.BackColor = a;
                }

                int i = 0;
                foreach (ListViewSubItem sub in item.SubItems)
                {
                    sub.Name = i.ToString();
                    i++;
                }

                foreach (ListViewSubItem sub in item.SubItems)
                {
                    if (sub.Name == "3")
                    {             //Apply column 2 color.
                        sub.BackColor = alt2;
                    }
                    else if (sub.Name == "11")
                    {      //Apply column 9 color.
                        sub.BackColor = alt9;
                    }
                    else if (item.Index % 2 == 0)
                    { //Apply alt row color.
                        sub.BackColor = b;
                    }
                    else
                    {                          //Apply main row color. This is the default.
                        sub.BackColor = a;
                    }
                }

                listView.Sort();
            }