textbox 和lable换行保存和显示

前台：

<asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox> 
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
<br />
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>

后台 插入数据库text_table中。  

string txt = TextBox1.Text; 
StringBuilder strSql = new StringBuilder();
strSql.Append("insert into text_table ");
strSql.Append("values(");
strSql.Append("'" + "',''" + ",''" + ",''" + ",''" + ",'" + "','" + TextBox1.Text + "'");
strSql.Append(")");
int countcj = DbHelperSQL.ExecuteSql(strSql.ToString());



DataSet ds = DbHelperSQL.Query("select * from text_table where a='3'");
string strtext = ds.Tables[0].Rows[0]["bz"].ToString();
TextBox1.Text = strtext;
Label2.Text = TextBox1.Text.Replace("
", " <br>");