GridView 72般绝技（三）

9.GridView实现自动编号：

效果图：

实现方法：
双击GridView的OnRowDataBound事件；
在后台的GridView1_RowDataBound()方法添加代码，最后代码如下所示：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
2

{
3

//如果是绑定数据行 //清清月儿http://blog.csdn.net/21aspnet
4

if (e.Row.RowType == DataControlRowType.DataRow)
5

{
6

////鼠标经过时，行背景色变
7

//e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E6F5FA'");
8

////鼠标移出时，行背景色变
9

//e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");
10

////当有编辑列时，避免出错，要加的RowState判断
11

//if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)
12

//{
13

// ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除："" + e.Row.Cells[1].Text + ""吗?')");
14

//}
15

}
16

if (e.Row.RowIndex != -1)
17

{
18

int id = e.Row.RowIndex + 1;
19

e.Row.Cells[0].Text = id.ToString();
20

}
21

}

注意这时最好把前台的第一列的表头该为“编号”，因为以前的第一列被“吃掉”了。

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"
2

OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" OnRowDataBound="GridView1_RowDataBound">
3

<FooterStyle BackColor="White" ForeColor="#000066" />
4

<Columns>
5

<asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True" />
6

<asp:BoundField DataField="姓名" HeaderText="用户姓名" />
7

<asp:BoundField DataField="员工性别" HeaderText="性别" />
8

<asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
9

<asp:CommandField HeaderText="选择" ShowSelectButton="True" />
10

<asp:CommandField HeaderText="编辑" ShowEditButton="True" />
11

<asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
12

</Columns>
13

<RowStyle ForeColor="#000066" />
14

<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
15

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
16

<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
17

</asp:GridView>

10.GridView实现自定义时间货币等字符串格式：

效果图：

图1-未格式化前

图2-格式化后

解决方法：
在asp.net 2.0中，如果要在绑定列中显示比如日期格式等，如果用下面的方法是显示不了的

1 <asp :BoundField DataField="CreationDate"
2 DataFormatString="{0:M-dd-yyyy}"
3 HeaderText="CreationDate" />

主要是由于htmlencode属性默认设置为true,已防止XSS攻击，安全起见而用的，所以，可以有以下两种方法解决

1、

<asp:GridView ID="GridView1" runat="server">
2

<columns>
3

<asp :BoundField DataField="CreationDate"
4

DataFormatString="{0:M-dd-yyyy}"
5

HtmlEncode="false"
6

HeaderText="CreationDate" />
7

</columns>
8

</asp:GridView>

将htmlencode设置为false即可

另外的解决方法为，使用模版列

<asp:GridView ID="GridView3" runat="server" >
2

<columns>
3

<asp:TemplateField HeaderText="CreationDate" >
4

<itemtemplate>
5

<asp:Label ID="Label1" runat="server" Text='<%# Bind("CreationDate", "{0:M-dd-yyyy}") %>' />
6

</itemtemplate>
7

<edititemtemplate>
8

<asp:Label ID="Label1" runat="server" Text='<%# Eval("CreationDate", "{0:M-dd-yyyy}") %>' />
9

</edititemtemplate>
10

</asp:TemplateField>
11

</columns>
12

</asp:GridView>

前台代码：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="身份证号码"
2

DataSourceID="SqlDataSource1" AllowSorting="True" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="3" Font-Size="12px" OnRowDataBound="GridView1_RowDataBound">
3

<Columns>
4

<asp:BoundField DataField="身份证号码" HeaderText="身份证号码" ReadOnly="True" SortExpression="身份证号码" />
5

<asp:BoundField DataField="姓名" HeaderText="姓名" SortExpression="姓名" />
6

<asp:BoundField DataField="邮政编码" HeaderText="邮政编码" SortExpression="邮政编码" />
7

<asp:BoundField DataField="出生日期" HeaderText="出生日期" SortExpression="出生日期" />
8

<asp:BoundField DataField="起薪" HeaderText="起薪" SortExpression="起薪" />
9

</Columns>
10

<FooterStyle BackColor="White" ForeColor="#000066" />
11

<RowStyle ForeColor="#000066" />
12

<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
13

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
14

<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
15

</asp:GridView>
16

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:北风贸易ConnectionString1 %>"
17

SelectCommand="SELECT top 5 [出生日期], [起薪], [身份证号码], [姓名], [家庭住址], [邮政编码] FROM [飞狐工作室]" DataSourceMode="DataReader"></asp:SqlDataSource>

附录-常用格式化公式：
{0:C} 货币；
{0:D4}由0填充的4个字符宽的字段中显示整数；
{0:000.0}四舍五入小数点保留第几位有效数字；
{0:N2}小数点保留2位有效数字；{0:N2}% 小数点保留2位有效数字加百分号；
{0:D}长日期；{0:d}短日期；{0:yy-MM-dd} 例如07-3-25；；{0:yyyy-MM-dd} 例如2007-3-25

11.GridView实现用“...”代替超长字符串：

效果图：

解决方法：数据绑定后过滤每一行即可

for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
2

{
3

DataRowView mydrv;
4

string gIntro;
5

if (GridView1.PageIndex == 0)
6

{
7

mydrv = myds.Tables["飞狐工作室"].DefaultView[i];//表名
8

gIntro = Convert.ToString(mydrv["家庭住址"]);//所要处理的字段
9

GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
10

}
11

else
12

{
13

mydrv = myds.Tables["飞狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)];
14

gIntro = Convert.ToString(mydrv["家庭住址"]);
15

GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
16

}
17

}

调用的方法：

public string SubStr(string sString, int nLeng)
2

{
3

if (sString.Length <= nLeng)
4

{
5

return sString;
6

}
7

string sNewStr = sString.Substring(0, nLeng);
8

sNewStr = sNewStr + "

";
9

return sNewStr;
10

}

后台全部代码：

using System;
2

using System.Data;
3

using System.Configuration;
4

using System.Web;
5

using System.Web.Security;
6

using System.Web.UI;
7

using System.Web.UI.WebControls;
8

using System.Web.UI.WebControls.WebParts;
9

using System.Web.UI.HtmlControls;
10

using System.Data.SqlClient;
11

public partial class _Default : System.Web.UI.Page
12

{
13

SqlConnection sqlcon;
14

SqlCommand sqlcom;
15

string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";
16

protected void Page_Load(object sender, EventArgs e)
17

{
18

if (!IsPostBack)
19

{
20

ViewState["SortOrder"] = "身份证号码";
21

ViewState["OrderDire"] = "ASC";
22

bind();
23

}
24

}
25

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
26

{
27

GridView1.EditIndex = e.NewEditIndex;
28

bind();
29

}
30

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
31

{
32

string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
33

sqlcon = new SqlConnection(strCon);
34

sqlcom = new SqlCommand(sqlstr,sqlcon);
35

sqlcon.Open();
36

sqlcom.ExecuteNonQuery();
37

sqlcon.Close();
38

bind();
39

}
40

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
41

{
42

sqlcon = new SqlConnection(strCon);
43

string sqlstr = "update 飞狐工作室 set 姓名='"
44

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='"
45

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='"
46

+ GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
47

sqlcom=new SqlCommand(sqlstr,sqlcon);
48

sqlcon.Open();
49

sqlcom.ExecuteNonQuery();
50

sqlcon.Close();
51

GridView1.EditIndex = -1;
52

bind();
53

}
54

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
55

{
56

GridView1.EditIndex = -1;
57

bind();
58

}
59

public void bind()
60

{
61

string sqlstr = "select top 5 * from 飞狐工作室";
62

sqlcon = new SqlConnection(strCon);
63

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
64

DataSet myds = new DataSet();
65

sqlcon.Open();
66

myda.Fill(myds, "飞狐工作室");
67

GridView1.DataSource = myds;
68

GridView1.DataKeyNames = new string[] { "身份证号码" };
69

GridView1.DataBind();
70

for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
71

{
72

DataRowView mydrv;
73

string gIntro;
74

if (GridView1.PageIndex == 0)
75

{
76

mydrv = myds.Tables["飞狐工作室"].DefaultView[i];
77

gIntro = Convert.ToString(mydrv["家庭住址"]);
78

GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
79

}
80

else
81

{
82

mydrv = myds.Tables["飞狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)];
83

gIntro = Convert.ToString(mydrv["家庭住址"]);
84

GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2);
85

}
86

}
87

sqlcon.Close();
89

}
90

public string SubStr(string sString, int nLeng)
91

{
92

if (sString.Length <= nLeng)
93

{
94

return sString;
95

}
96

string sNewStr = sString.Substring(0, nLeng);
97

sNewStr = sNewStr + "

";
98

return sNewStr;
99

}
100

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
101

{
102

//如果是绑定数据行
103

if (e.Row.RowType == DataControlRowType.DataRow)
104

{
105

////鼠标经过时，行背景色变
106

//e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E6F5FA'");
107

////鼠标移出时，行背景色变
108

//e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");
109

////当有编辑列时，避免出错，要加的RowState判断
110

//if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate)
111

//{
112

// ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除："" + e.Row.Cells[1].Text + ""吗?')");
113

//}
114

}
115

if (e.Row.RowIndex != -1)
116

{
117

int id = e.Row.RowIndex + 1;
118

e.Row.Cells[0].Text = id.ToString();
119

}
120

}
121

}

12.GridView一般换行与强制换行：

效果图：

首先设置<asp:BoundField DataField="家庭住址" HeaderText="家庭住址" ItemStyle-Width="100" />
gridview里有一列绑定的数据很长，显示的时候在一行里面显示，页面拉得很宽。
原因是连续英文段为一个整体导致的，在RowDataBound中添加上了一句e.Row.Cells[2].Style.Add("word-break", "break-all")就可以。

如果要给所有的列增加此属性：

protected void Page_Load(object sender, EventArgs e)
2

{
3

//正常换行
4

GridView1.Attributes.Add("style", "word-break:keep-all;word-wrap:normal");
5

//下面这行是自动换行
6

GridView1.Attributes.Add("style", "word-break:break-all;word-wrap:break-word");
7

if (!IsPostBack)
8

{
9

bind();//调用数据绑定即可
10

}
11

}

总之：善用CSS的word-break:break-all;word-wrap:break-word属性即可，这个属性是通用的对于顽固的南换行问题都可以解决，不局限于GridView。

13.GridView显示隐藏某一列：
本方案为月儿独创，不同于网上其他方式，我觉得用一个CheckBox更人性化，这样可以隐藏不必要的列，让用户自己选择需要出现的列，在处理多列时这是一个很好的解决方案！

效果图：

图1-开始

图2-点击显示的CheckBox后

解决方案：

public void bind()
2

{
3

string sqlstr = "select top 5 * from 飞狐工作室";
4

sqlcon = new SqlConnection(strCon);
5

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
6

DataSet myds = new DataSet();
7

sqlcon.Open();
8

myda.Fill(myds, "飞狐工作室");
9

GridView1.DataSource = myds;
10

GridView1.DataKeyNames = new string[] { "身份证号码" };
11

GridView1.DataBind();
12

sqlcon.Close();
13

GridView1.Columns[3].Visible = false;//一开始隐藏
14

CheckBox1.Checked = false;//如果不这样后面的代码会把他True
15

}

双击CheckBox1，在CheckedChanged方法里写上代码，最后代码如下：

protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
2

{
3

GridView1.Columns[3].Visible=! GridView1.Columns[3].Visible;
4

Response.Write("GridView1的第4列现在的显示隐藏状态是："+GridView1.Columns[3].Visible.ToString());
5

}

注意：CheckBox1的AutoPostBack要True！

后台全部代码如下：

using System;
2

using System.Data;
3

using System.Configuration;
4

using System.Web;
5

using System.Web.Security;
6

using System.Web.UI;
7

using System.Web.UI.WebControls;
8

using System.Web.UI.WebControls.WebParts;
9

using System.Web.UI.HtmlControls;
10

using System.Data.SqlClient;
11

public partial class _Default : System.Web.UI.Page
12

{
13

SqlConnection sqlcon;
14

SqlCommand sqlcom;
15

string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";
16

protected void Page_Load(object sender, EventArgs e)
17

{
18

if (!IsPostBack)
19

{
20

ViewState["SortOrder"] = "身份证号码";
21

ViewState["OrderDire"] = "ASC";
22

bind();
23

}
24

}
25

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
26

{
27

GridView1.EditIndex = e.NewEditIndex;
28

bind();
29

}
30

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
31

{
32

string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
33

sqlcon = new SqlConnection(strCon);
34

sqlcom = new SqlCommand(sqlstr,sqlcon);
35

sqlcon.Open();
36

sqlcom.ExecuteNonQuery();
37

sqlcon.Close();
38

bind();
39

}
40

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
41

{
42

sqlcon = new SqlConnection(strCon);
43

string sqlstr = "update 飞狐工作室 set 姓名='"
44

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='"
45

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='"
46

+ GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
47

sqlcom=new SqlCommand(sqlstr,sqlcon);
48

sqlcon.Open();
49

sqlcom.ExecuteNonQuery();
50

sqlcon.Close();
51

GridView1.EditIndex = -1;
52

bind();
53

}
54

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
55

{
56

GridView1.EditIndex = -1;
57

bind();
58

}
59

public void bind()
60

{
61

string sqlstr = "select top 5 * from 飞狐工作室";
62

sqlcon = new SqlConnection(strCon);
63

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
64

DataSet myds = new DataSet();
65

sqlcon.Open();
66

myda.Fill(myds, "飞狐工作室");
67

GridView1.DataSource = myds;
68

GridView1.DataKeyNames = new string[] { "身份证号码" };
69

GridView1.DataBind();
70

sqlcon.Close();
71

GridView1.Columns[3].Visible = false;
72

CheckBox1.Checked = false;
73

}
74

protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
75

{
76

GridView1.Columns[3].Visible=! GridView1.Columns[3].Visible;
77

Response.Write("GridView1的第4列现在的显示隐藏状态是："+GridView1.Columns[3].Visible.ToString());
78

}
79

}

前台代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2

<html xmlns="http://www.w3.org/1999/xhtml" >
3

<head runat="server">
4

<title>GridView显示隐藏列清清月儿http://blog.csdn.net/21aspnet </title>
5

</head>
6

<body style="font-size=12px">
7

<form id="form1" runat="server">
8

<div>
9

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"
10

OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" >
11

<FooterStyle BackColor="White" ForeColor="#000066" />
12

<Columns>
13

<asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True" />
14

<asp:BoundField DataField="姓名" HeaderText="用户姓名" />
15

<asp:BoundField DataField="邮政编码" HeaderText="邮政编码" SortExpression="邮政编码" />
16

<asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
17

<asp:CommandField HeaderText="选择" ShowSelectButton="True" />
18

<asp:CommandField HeaderText="编辑" ShowEditButton="True" />
19

<asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
20

</Columns>
21

<RowStyle ForeColor="#000066" />
22

<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
23

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" />
24

<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
25

</asp:GridView>
26

<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" Font-Size="12px"
27

OnCheckedChanged="CheckBox1_CheckedChanged" Text="显示隐藏家庭住址" /></div>
28

</form>
29

</body>
30

</html>

发表于 2007-12-03 01:05 辛迪阅读(215) 评论(0) 编辑收藏举报

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GridView 72般绝技（三）

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