这两天，做一个模拟的电话簿（某IT经理给我的作业），包括2张表，一个是分组表tb_Group(GroupID, GroupName)，一个是联系人表tb_Person(PersonName,GroupID,CellPhone,Remark)，实现联系人的增删改查，看似很简单的东西，也学到了挺多东西。按照要求，把添加，查找和编辑的功能，放在了不同的页面：(其实，我认为完全没有必要分为这么多页面，每个页面都有字段的输入框，可以复合利用嘛，但是，要求这样做，就这么做吧！)
1. 添加页面：对姓名，分组，手机号进行不为空的验证，对手机号进行格式验证，添加成功后，跳转到查找页面。
2. 查找页面：对姓名，手机号，备注进行组合模糊查找，分组查找，所有字段组合查找。对记录进行排序，和分页。对记录进行删除。点击编辑时，跳转到编辑页面，并把该行的值传递过去。
3. 编辑页面：和添加页面完全一样，只是数据是从查找页面反射过来的，同样对编辑后的数据进行验证。 保存编辑后，跳转到查找页面。
在过程中遇到的障碍：
1. 绑定分组的DropDownList的Items，页面载入时，怎样来显示为不选择，怎样对未选择分组进行验证。方法是在tb_Group中加入一条空记录（GroupID=1，GroupName为空），载入时显示该空记录，如果状态为选中该空记录，提示选择分组。验证控件为：
<
asp:comparevalidator
id
="GroupNull"
runat
="server"
Display
="Dynamic"
ControlToValidate
="DdlGroup"
Type
="String"
ValueToCompare
="1"
Operator
="NotEqual"
ErrorMessage
="请选择分组"
></
asp:comparevalidator
>
2. 手机号码的验证：本来想把验证手机号格式和手机号不为空一起验证，用RegularExpressionValidator控件验证手机号格式，但是，没能同时验证不为空，只得又添加一个RequiredFieldValidator来验证不为空。
3. 点击GridView中的“编辑”时，把数据传递到编辑页面，但是不知道Group的值怎么传递过去。朋友给解决的：
查找页代码：
Find
//行编辑事件
protected void GrdPerson_RowEditing(object sender, GridViewEditEventArgs e)
{
GrdPerson.EditIndex = e.NewEditIndex;
string PersonName= GrdPerson.Rows[e.NewEditIndex].Cells[0].Text.ToString();
string GroupName = GrdPerson.Rows[e.NewEditIndex].Cells[1].Text.ToString();
string CellPhone = GrdPerson.Rows[e.NewEditIndex].Cells[2].Text.ToString();
string Remark = GrdPerson.Rows[e.NewEditIndex].Cells[3].Text.ToString();
string s_url;
//多值页面传递
s_url = "EditPerson.aspx?PersonName=" + PersonName + "&GroupName=" + GroupName+"&CellPhone="+CellPhone+"&Remark="+Remark;
Response.Redirect(s_url);
}
编辑页代码：
Edit
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGroup();
}
TxtName.Text = Request.QueryString["PersonName"];
TxtCell.Text = Request.QueryString["CellPhone"];
TxtRemark.Text = Request.QueryString["Remark"];
string GroupID = Request.QueryString["PersonName"];
DdlGroup.SelectedIndex=DdlGroup.Items.IndexOf(DdlGroup.Items.FindByValue(GroupID));
string GroupName = Request.QueryString["GroupName"];
string value = dalGroup.SelectByGroupName(GroupName);
DdlGroup.SelectedValue = value;
}
4. 排序：即在Gridview的标题栏，点击某字段，按该字段的顺序和逆序排列。另外写篇日志吧！
程序主要代码：
Utility类：
Code
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
/// <summary>
/// Utility 的摘要说明
/// </summary>
public class Utility
{
static string connString = ConfigurationManager.AppSettings["connString"].ToString();
public Utility()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// 执行SQL语句，返回DataTable
/// </summary>
/// <param name="strSql"></param>
/// <param name="name"></param>
/// <returns></returns>
public DataTable ExcuteSql(string strSql, string name)
{
DataTable dt = new DataTable();
SqlConnection con = new SqlConnection(connString);
SqlDataAdapter adp = new SqlDataAdapter(strSql, con);
try
{
con.Open();
adp.Fill(dt);
return dt;
}
finally
{
con.Close();
adp.Dispose();
}
}
/// <summary>
/// 执行SQL语句，返回执行状态
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
public bool ExcuteSql(string strSql)
{
bool ret ;
SqlConnection con = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand(strSql, con);
try
{
con.Open();
int i = cmd.ExecuteNonQuery();
if (i > 0)
return ret = true;
else
return ret = false;
}
finally
{
con.Close();
}
}
}
dropDownList的Items动态绑定：
public
DataTable SelectAll()
{
string
strSql
=
@"
select * from tb_Group order by GroupId
"
;
DataTable dt
=
utility.ExcuteSql(strSql,
"
tb_Group
"
);
return
dt;
}
Code
//绑定下拉项
private void BindGroup()
{
DdlGroup.DataSource = dalGroup.SelectAll();
DdlGroup.DataTextField = "GroupName";
DdlGroup.DataValueField = "GroupId";
DdlGroup.DataBind();
}
添加记录：
Code
//添加
public bool Insert(string name, string groupid, string cellphone, string remark)
{
string strSql = @"insert tb_Person(PersonName,groupid,cellphone,remark) values('{0}','{1}','{2}','{3}')";
strSql = string.Format(strSql, new string[] { name, groupid, cellphone, remark });
return utility.ExcuteSql(strSql);
}
Code
protected void BtnAdd_Click(object sender, EventArgs e)
{
string name = TxtName.Text.Trim().ToString();
string group = DdlGroup.SelectedValue.ToString();
string cellPhone = TxtCell.Text.Trim().ToString();
string remark = TxtRemark.Text.Trim().ToString();
if (dalPerson.Insert(name, group, cellPhone, remark))
{
Response.Redirect("FindPerson.aspx");
}
else
{
Response.Write("<script>alert('添加失败，请重新添加！')</script>");
}
}
查找记录：
Code
//条件查询
public DataTable SelectByCondition(string byCondition)
{
string strSql = @"select PersonName,groupname,cellphone,remark from tb_Person a left join tb_Group b on a.groupid=b.groupid where 1=1 {0}";
strSql = string.Format(strSql, byCondition);
DataTable dt = utility.ExcuteSql(strSql, "tb_Person");
return dt;
}
Code
protected void BtnFind_Click(object sender, EventArgs e)
{
string name = TxtName.Text.Trim().ToString();
string group = DdlGroup.SelectedValue.ToString();
string cellphone = TxtCell.Text.Trim().ToString();
string remark = TxtRemark.Text.Trim().ToString();
StringBuilder sbCondition = new StringBuilder();
if (name.Length > 0)
{
sbCondition.Append("and PersonName like '%" + name + "%'");
}
if (DdlGroup.SelectedValue != "1")
{
sbCondition.Append("and b.groupid = '" + group + "'");
}
if (cellphone.Length > 0)
{
sbCondition.Append("and cellphone like '%" + cellphone + "%'");
}
if (remark.Length > 0)
{
sbCondition.Append("and remark like '%" + remark + "%'");
}
string bycondition = sbCondition.ToString();
DataTable dt = dalPerson.SelectByCondition(bycondition);
GrdPerson.DataSource = dt;
GrdPerson.DataBind();
}
删除记录：
Code
//删除记录
public bool delete(string PersonName)
{
string strSql = @"delete tb_Person where PersonName='{0}'";
strSql = string.Format(strSql, new string[] { PersonName });
return utility.ExcuteSql(strSql);
}
Code
//行删除事件
protected void GrdPerson_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string PersonName = GrdPerson.Rows[e.RowIndex].Cells[0].Text;
dalPerson.delete(PersonName);
BindAll();
}
编辑记录：
点击编辑，跳转到编辑页面，并把该行的值传递过去。
Code
//行编辑事件
protected void GrdPerson_RowEditing(object sender, GridViewEditEventArgs e)
{
GrdPerson.EditIndex = e.NewEditIndex;
string PersonName= GrdPerson.Rows[e.NewEditIndex].Cells[0].Text.ToString();
string GroupName = GrdPerson.Rows[e.NewEditIndex].Cells[1].Text.ToString();
string CellPhone = GrdPerson.Rows[e.NewEditIndex].Cells[2].Text.ToString();
string Remark = GrdPerson.Rows[e.NewEditIndex].Cells[3].Text.ToString();
string s_url;
//多值页面传递
s_url = "EditPerson.aspx?PersonName=" + PersonName + "&GroupName=" + GroupName+"&CellPhone="+CellPhone+"&Remark="+Remark;
Response.Redirect(s_url);
}
编辑页面的代码：
Code
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGroup();
}
TxtName.Text = Request.QueryString["PersonName"];
TxtCell.Text = Request.QueryString["CellPhone"];
TxtRemark.Text = Request.QueryString["Remark"];
string GroupID = Request.QueryString["PersonName"];
DdlGroup.SelectedIndex=DdlGroup.Items.IndexOf(DdlGroup.Items.FindByValue(GroupID));
string GroupName = Request.QueryString["GroupName"];
string value = dalGroup.SelectByGroupName(GroupName);
DdlGroup.SelectedValue = value;
}
Code
//编辑
protected void BtnEdit_Click(object sender, EventArgs e)
{
string name = TxtName.Text.Trim().ToString();
string group = DdlGroup.SelectedValue.ToString();
string cellPhone = TxtCell.Text.Trim().ToString();
string Remark = TxtRemark.Text.Trim().ToString();
if (dalPerson.Update(name, group, cellPhone, Remark))
{
Response.Redirect("FindPerson.aspx");
}
else
{
Response.Write("<script>alert('更新失败，请重新操作！')</script>");
}
}
