GridView 72般绝技（五）

16.GridView突出显示某一单元格（例如金额低于多少，分数不及格等）

效果图：

解决方案：主要是绑定后过滤

GridView1.DataBind();
2

for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
3

{
4

DataRowView mydrv = myds.Tables["飞狐工作室"].DefaultView[i];
5

string score = Convert.ToString(mydrv["起薪"]);
6

if (Convert.ToDouble(score) < 34297.00)//大家这里根据具体情况设置可能ToInt32等等
7

{
8

GridView1.Rows[i].Cells[4].BackColor = System.Drawing.Color.Red;
9

}
10

}
11

sqlcon.Close();

全部后台代码：

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

using System.Drawing;
12

public partial class Default7 : System.Web.UI.Page
13

{
14

SqlConnection sqlcon;
15

SqlCommand sqlcom;
16

string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";
17

protected void Page_Load(object sender, EventArgs e)
18

{
19

if (!IsPostBack)
20

{
21

bind();
22

}
23

}
24

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
25

{
26

GridView1.EditIndex = e.NewEditIndex;
27

bind();
28

}
29

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
30

{
31

sqlcon = new SqlConnection(strCon);
32

string sqlstr = "update 飞狐工作室 set 姓名='"
33

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='"
34

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='"
35

+ GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
36

sqlcom = new SqlCommand(sqlstr, sqlcon);
37

sqlcon.Open();
38

sqlcom.ExecuteNonQuery();
39

sqlcon.Close();
40

GridView1.EditIndex = -1;
41

bind();
42

}
43

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
44

{
45

GridView1.EditIndex = -1;
46

bind();
47

}
48

public void bind()
49

{
50

string sqlstr = "select top 10 * from 飞狐工作室";
51

sqlcon = new SqlConnection(strCon);
52

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
53

DataSet myds = new DataSet();
54

sqlcon.Open();
55

myda.Fill(myds, "飞狐工作室");
56

GridView1.DataSource = myds;
57

GridView1.DataKeyNames = new string[] { "身份证号码" };
58

GridView1.DataBind();
59

for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
60

{
61

DataRowView mydrv = myds.Tables["飞狐工作室"].DefaultView[i];
62

string score = Convert.ToString(mydrv["起薪"]);
63

if (Convert.ToDouble(score) < 34297.00)//大家这里根据具体情况设置可能ToInt32等等
64

{
65

GridView1.Rows[i].Cells[4].BackColor = System.Drawing.Color.Red;
66

}
67

}
68

sqlcon.Close();
69

}
70

}

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 id="Head1" runat="server">
4

<title>GridView突出显示某一单元格清清月儿http://blog.csdn.net/21aspnet </title>
5

</head>
6

<body >
7

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

<div>
9

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" 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:CommandField HeaderText="编辑" ShowEditButton="True" />
14

<asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True" />
15

<asp:BoundField DataField="姓名" HeaderText="姓名" />
16

<asp:BoundField DataField="出生日期" HeaderText="邮政编码" />
17

<asp:BoundField DataField="起薪" HeaderText="起薪" DataFormatString="{0:C}" HtmlEncode="false"/>
18

<asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
19

<asp:BoundField DataField="邮政编码" HeaderText="邮政编码" />
20

</Columns>
22

<RowStyle ForeColor="#000066" />
23

<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
24

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" CssClass="ms-formlabel DataGridFixedHeader"/>
25

<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
26

</asp:GridView>
27

</div>
28

</form>
29

</body>
30

</html>

17.GridView加入自动求和求平均值小计

效果图：

解决方案：

private double sum = 0;//取指定列的数据和，你要根据具体情况对待可能你要处理的是int
2

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
3

{
4

if (e.Row.RowIndex >= 0)
5

{
6

sum += Convert.ToDouble(e.Row.Cells[6].Text);
7

}
8

else if (e.Row.RowType == DataControlRowType.Footer)
9

{
10

e.Row.Cells[5].Text = "总薪水为：";
11

e.Row.Cells[6].Text = sum.ToString();
12

e.Row.Cells[3].Text = "平均薪水为：";
13

e.Row.Cells[4].Text = ((int)(sum / GridView1.Rows.Count)).ToString();
14

}
15

}

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

using System.Drawing;
12

public partial class Default7 : System.Web.UI.Page
13

{
14

SqlConnection sqlcon;
15

SqlCommand sqlcom;
16

string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";
17

protected void Page_Load(object sender, EventArgs e)
18

{
19

if (!IsPostBack)
20

{
21

bind();
22

}
23

}
24

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
25

{
26

GridView1.EditIndex = e.NewEditIndex;
27

bind();
28

}
29

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
30

{
31

sqlcon = new SqlConnection(strCon);
32

string sqlstr = "update 飞狐工作室 set 姓名='"
33

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='"
34

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='"
35

+ GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
36

sqlcom = new SqlCommand(sqlstr, sqlcon);
37

sqlcon.Open();
38

sqlcom.ExecuteNonQuery();
39

sqlcon.Close();
40

GridView1.EditIndex = -1;
41

bind();
42

}
43

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
44

{
45

GridView1.EditIndex = -1;
46

bind();
47

}
48

public void bind()
49

{
50

string sqlstr = "select top 5 * from 飞狐工作室";
51

sqlcon = new SqlConnection(strCon);
52

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
53

DataSet myds = new DataSet();
54

sqlcon.Open();
55

myda.Fill(myds, "飞狐工作室");
56

GridView1.DataSource = myds;
57

GridView1.DataKeyNames = new string[] { "身份证号码" };
58

GridView1.DataBind();
59

sqlcon.Close();
60

}
61

private double sum = 0;//取指定列的数据和
62

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
63

{
64

if (e.Row.RowIndex >= 0)
65

{
66

sum += Convert.ToDouble(e.Row.Cells[6].Text);
67

}
68

else if (e.Row.RowType == DataControlRowType.Footer)
69

{
70

e.Row.Cells[5].Text = "总薪水为：";
71

e.Row.Cells[6].Text = sum.ToString();
72

e.Row.Cells[3].Text = "平均薪水为：";
73

e.Row.Cells[4].Text = ((int)(sum / GridView1.Rows.Count)).ToString();
74

}
75

}
76

}

前台：唯一的花头就是设置ShowFooter="True" ，否则默认表头为隐藏的！

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

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

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

<Columns>
5

<asp:CommandField HeaderText="编辑" ShowEditButton="True" />
6

<asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True" />
7

<asp:BoundField DataField="姓名" HeaderText="姓名" />
8

<asp:BoundField DataField="出生日期" HeaderText="邮政编码" />
9

<asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
10

<asp:BoundField DataField="邮政编码" HeaderText="邮政编码" />
11

<asp:BoundField DataField="起薪" HeaderText="起薪" />
12

</Columns>
14

<RowStyle ForeColor="#000066" />
15

<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
16

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" CssClass="ms-formlabel DataGridFixedHeader"/>
17

<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
18

</asp:GridView>

18.GridView数据导入Excel/Excel数据读入GridView

效果图：

解决方案：
页面增加一个按钮，单击事件添加如下方法：

protected void Button1_Click(object sender, EventArgs e)
2

{
3

Export("application/ms-excel", "学生成绩报表.xls");
4

}
5

private void Export(string FileType, string FileName)
6

{
7

Response.Charset = "GB2312";
8

Response.ContentEncoding = System.Text.Encoding.UTF7;
9

Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
10

Response.ContentType = FileType;
11

this.EnableViewState = false;
12

StringWriter tw = new StringWriter();
13

HtmlTextWriter hw = new HtmlTextWriter(tw);
14

GridView1.RenderControl(hw);
15

Response.Write(tw.ToString());
16

Response.End();
17

}
18

//如果没有下面方法会报错类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内
19

public override void VerifyRenderingInServerForm(Control control)
20

{
21

}

还有由于是文件操作所以要引入名称空间IO和Text

后台代码：

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

using System.Drawing;
12

using System.IO;
13

using System.Text;
14

public partial class Default7 : System.Web.UI.Page
15

{
16

SqlConnection sqlcon;
17

SqlCommand sqlcom;
18

string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";
19

protected void Page_Load(object sender, EventArgs e)
20

{
21

if (!IsPostBack)
22

{
23

bind();
24

}
25

}
26

public void bind()
28

{
29

string sqlstr = "select top 5 * from 飞狐工作室";
30

sqlcon = new SqlConnection(strCon);
31

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
32

DataSet myds = new DataSet();
33

sqlcon.Open();
34

myda.Fill(myds, "飞狐工作室");
35

GridView1.DataSource = myds;
36

GridView1.DataKeyNames = new string[] { "身份证号码" };
37

GridView1.DataBind();
38

sqlcon.Close();
39

}
40

protected void Button1_Click(object sender, EventArgs e)
41

{
42

Export("application/ms-excel", "学生成绩报表.xls");
43

}
44

private void Export(string FileType, string FileName)
45

{
46

Response.Charset = "GB2312";
47

Response.ContentEncoding = System.Text.Encoding.UTF7;
48

Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
49

Response.ContentType = FileType;
50

this.EnableViewState = false;
51

StringWriter tw = new StringWriter();
52

HtmlTextWriter hw = new HtmlTextWriter(tw);
53

GridView1.RenderControl(hw);
54

Response.Write(tw.ToString());
55

Response.End();
56

}
57

public override void VerifyRenderingInServerForm(Control control)
58

{
59

}
60

}

前台：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3"
2

BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" >
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="姓名" />
7

<asp:BoundField DataField="出生日期" HeaderText="邮政编码" />
8

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

<asp:BoundField DataField="邮政编码" HeaderText="邮政编码" />
10

<asp:BoundField DataField="起薪" HeaderText="起薪" />
11

</Columns>
13

<RowStyle ForeColor="#000066" />
14

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

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" CssClass="ms-formlabel DataGridFixedHeader"/>
16

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

</asp:GridView>
18

<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="导出" />

读取Excel数据的代码：这个很简单的

private DataSet CreateDataSource()
2

{
3

string strCon;
4

strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("excel.xls") + "; Extended Properties=Excel 8.0;";
5

OleDbConnection olecon = new OleDbConnection(strCon);
6

OleDbDataAdapter myda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strCon);
7

DataSet myds = new DataSet();
8

myda.Fill(myds);
9

return myds;
10

}
11

protected void Button1_Click(object sender, EventArgs e)
12

{
13

GridView1.DataSource = CreateDataSource();
14

GridView1.DataBind();
15

}

发表于 2007-12-03 01:11 辛迪阅读(271) 评论(0) 编辑收藏举报

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GridView 72般绝技（五）

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