怎样在richtextbox中选中整行文字，并使这行的背景色改变

Question

[C#]
public Color SelectionColor {get; set;}
 设置这个属性。

Answer 1

这么简单的问题，我贴段代码，其中rtbReceive是一个RichTextBox控件
int iPos=rtbReceive.TextLength;
rtbReceive.AppendText(str1);
rtbReceive.Select(iPos,rtbReceive.TextLength-iPos);
rtbReceive.SelectionFont = new Font("宋体", 9, FontStyle.Bold | FontStyle.Underline);
rtbReceive.SelectionColor = System.Drawing.Color.Red;iPos=rtbReceive.TextLength;
rtbReceive.AppendText(str2);
rtbReceive.Select(iPos,rtbReceive.TextLength-iPos);
rtbReceive.SelectionFont = new Font("宋体", 12, FontStyle.Regular);
rtbReceive.SelectionColor = System.Drawing.Color.Red;
rtbReceive.SelectionIndent=20;