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[.NET开发] Asp.net中GridView使用详解(转载)

发表于 2018-4-24 08:00:01
";

//第二行表头

tcHeader.Add(new TableHeaderCell());

tcHeader[2].Attributes.Add("bgcolor", "DarkSeaGreen");

tcHeader[2].Text = "身份证号码";

tcHeader.Add(new TableHeaderCell());

tcHeader[3].Attributes.Add("bgcolor", "LightSteelBlue");

tcHeader[3].Attributes.Add("colspan", "2");

tcHeader[3].Text = "基本信息";

tcHeader.Add(new TableHeaderCell());

tcHeader[4].Attributes.Add("bgcolor", "DarkSeaGreen");

tcHeader[4].Text = "福利";

tcHeader.Add(new TableHeaderCell());

tcHeader[5].Attributes.Add("bgcolor", "LightSteelBlue");

tcHeader[5].Attributes.Add("colspan", "2");

tcHeader[5].Text = "联系方式

";

//第三行表头

tcHeader.Add(new TableHeaderCell());

tcHeader[6].Attributes.Add("bgcolor", "Khaki");

tcHeader[6].Text = "身份证号码";

tcHeader.Add(new TableHeaderCell());

tcHeader[7].Attributes.Add("bgcolor", "Khaki");

tcHeader[7].Text = "姓名";

tcHeader.Add(new TableHeaderCell());

tcHeader[8].Attributes.Add("bgcolor", "Khaki");

tcHeader[8].Text = "出生日期";

tcHeader.Add(new TableHeaderCell());

tcHeader[9].Attributes.Add("bgcolor", "Khaki");

tcHeader[9].Text = "薪水";

tcHeader.Add(new TableHeaderCell());

tcHeader[10].Attributes.Add("bgcolor", "Khaki");

tcHeader[10].Text = "家庭住址";

tcHeader.Add(new TableHeaderCell());

tcHeader[11].Attributes.Add("bgcolor", "Khaki");

tcHeader[11].Text = "邮政编码";

break;

}

}

}

前台:

GridView合并多重表头表头 清清月儿http://blog.csdn.net/21aspnet

OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" OnRowCreated="GridView1_RowCreated" >

17.GridView突出显示某一单元格(例如金额低于多少,分数不及格等)

解决方案:主要是绑定后过滤

GridView1.DataBind();

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

{

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

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

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

{

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

}

}

sqlcon.Close();

前台代码:

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

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

18.GridView加入自动求和求平均值小计

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

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowIndex >= 0)

{

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

}

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

{

e.Row.Cells[5].Text = "总薪水为:";

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

e.Row.Cells[3].Text = "平均薪水为:";

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

}

}

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

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

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

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)

{

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

}

private void Export(string FileType, string FileName)

{

Response.Charset = "GB2312";

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

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

Response.ContentType = FileType;

this.EnableViewState = false;

StringWriter tw = new StringWriter();

HtmlTextWriter hw = new HtmlTextWriter(tw);

GridView1.RenderControl(hw);

Response.Write(tw.ToString());

Response.End();

}

//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

public override void VerifyRenderingInServerForm(Control control)

{

}

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;

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;

using System.Drawing;

using System.IO;

using System.Text;

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

{

SqlConnection sqlcon;

SqlCommand sqlcom;

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

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

bind();

}

}

public void bind()

{

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

sqlcon = new SqlConnection(strCon);

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds, "飞狐工作室");

GridView1.DataSource = myds;

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

GridView1.DataBind();

sqlcon.Close();

}

protected void Button1_Click(object sender, EventArgs e)

{

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

}

private void Export(string FileType, string FileName)

{

Response.Charset = "GB2312";

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

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

Response.ContentType = FileType;

this.EnableViewState = false;

StringWriter tw = new StringWriter();

HtmlTextWriter hw = new HtmlTextWriter(tw);

GridView1.RenderControl(hw);

Response.Write(tw.ToString());

Response.End();

}

public override void VerifyRenderingInServerForm(Control control)

{

}

}

前台:

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

读取Excel数据的代码:这个很简单的

private DataSet CreateDataSource()

{

string strCon;

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

OleDbConnection olecon = new OleDbConnection(strCon);

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

DataSet myds = new DataSet();

myda.Fill(myds);

return myds;

}

protected void Button1_Click(object sender, EventArgs e)

{

GridView1.DataSource = CreateDataSource();

GridView1.DataBind();

}

l GridView无代码分页排序

l GridView选中,编辑,取消,删除

l GridView正反双向排序

l GridView和下拉菜单DropDownList结合

l GridViewCheckBox结合

l 鼠标移到GridView某一行时改变该行的背景色方法一

l 鼠标移到GridView某一行时改变该行的背景色方法二

l GridView实现删除时弹出确认对话框

l GridView实现自动编号

l GridView实现自定义时间货币等字符串格式

l GridView实现用“...”代替超长字符串

l GridView一般换行与强制换行

l GridView显示隐藏某一列

l GridView弹出新页面/弹出新窗口

l GridView固定表头(不用JavaScript只用CSS2行代码,很好用)

l GridView合并表头多重表头无错完美版(以合并33行举例)

l GridView突出显示某一单元格(例如金额低于多少,分数不及格等)

l GridView加入自动求和求平均值小计

l GridView数据导入Excel/Excel数据读入GridView

1.GridView简单代码分页排序:

1.AllowSorting设为True,aspx代码中是AllowSorting="True";

2.默认1页10条,如果要修改每页条数,修改PageSize即可,在aspx代码中是PageSize="12"。

3.默认的是单向排序的,右击GridView弹出“属性”,选择AllowSorting为True即可。

4.添加代码:

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)

{

GridView1.PageIndex = e.NewPageIndex;

Bind();

}

2.GridView选中,编辑,取消,删除:

后台代码:

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;

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

{

SqlConnection sqlcon;

SqlCommand sqlcom;

string strCon = "Data Source=(local);Database=数据库名;Uid=帐号;Pwd=密码";

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

bind();

}

}

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

{

GridView1.EditIndex = e.NewEditIndex;

bind();

}

//删除

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

{

string sqlstr = "delete from 表 where id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";

sqlcon = new SqlConnection(strCon);

sqlcom = new SqlCommand(sqlstr,sqlcon);

sqlcon.Open();

sqlcom.ExecuteNonQuery();

sqlcon.Close();

bind();

}

//更新

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

{

sqlcon = new SqlConnection(strCon);

string sqlstr = "update 表 set 字段1='"

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',字段2='"

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim() + "',字段3='"

+ ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where id='"

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

sqlcom=new SqlCommand(sqlstr,sqlcon);

sqlcon.Open();

sqlcom.ExecuteNonQuery();

sqlcon.Close();

GridView1.EditIndex = -1;

bind();

}

//取消

protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

{

GridView1.EditIndex = -1;

bind();

}

//绑定

public void bind()

{

string sqlstr = "select * from 表";

sqlcon = new SqlConnection(strCon);

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds, "表");

GridView1.DataSource = myds;

GridView1.DataKeyNames = new string[] { "id" };//主键

GridView1.DataBind();

sqlcon.Close();

}

}

前台主要代码:

... ...

ForeColor="#333333" GridLines="None" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing"

OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit">

3.GridView正反双向排序:

后台代码:

using System;

using System.Data;

using System.Configuration;

using System.Collections;

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;

public partial class Default3 : System.Web.UI.Page

{ SqlConnection sqlcon;

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

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

ViewState["SortOrder"] = "身份证号码";

ViewState["OrderDire"] = "ASC";

bind();

}

}

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)

{

string sPage = e.SortExpression;

if (ViewState["SortOrder"].ToString() == sPage)

{

if (ViewState["OrderDire"].ToString() == "Desc")

ViewState["OrderDire"] = "ASC";

else

ViewState["OrderDire"] = "Desc";

}

else

{

ViewState["SortOrder"] = e.SortExpression;

}

bind();

}

public void bind()

{

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

sqlcon = new SqlConnection(strCon);

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds, "飞狐工作室");

DataView view = myds.Tables["飞狐工作室"].DefaultView;

string sort = (string)ViewState["SortOrder"] + " " + (string)ViewState["OrderDire"];

view.Sort = sort;

GridView1.DataSource = view;

GridView1.DataBind();

sqlcon.Close();

}

}

前台主要代码:

CellPadding="3" Font-Size="9pt" OnSorting="GridView1_Sorting" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px">

4.GridView和下拉菜单DropDownList结合:

后台代码:

using System;

using System.Data;

using System.Configuration;

using System.Collections;

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;

public partial class Default4 : System.Web.UI.Page

{

SqlConnection sqlcon;

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

protected void Page_Load(object sender, EventArgs e)

{

DropDownList ddl;

if (!IsPostBack)

{

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

sqlcon = new SqlConnection(strCon);

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds, "飞狐工作室");

GridView1.DataSource = myds;

GridView1.DataBind();

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

{

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

if (Convert.ToString(mydrv["员工性别"]).Trim() == "True")

{

ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");

ddl.SelectedIndex = 0;

}

if (Convert.ToString(mydrv["员工性别"]).Trim() == "False")

{

ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");

ddl.SelectedIndex = 1;

}

}

sqlcon.Close();

}

}

public SqlDataReader ddlbind()

{

string sqlstr = "select distinct 员工性别 from 飞狐工作室";

sqlcon = new SqlConnection(strCon);

SqlCommand sqlcom = new SqlCommand(sqlstr, sqlcon);

sqlcon.Open();

return sqlcom.ExecuteReader();

}

前台主要代码:

CellPadding="3" Font-Size="9pt" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px">

5.GridViewCheckBox结合:

后台代码:

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;

public partial class Default5 : System.Web.UI.Page

{

SqlConnection sqlcon;

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

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

bind();

}

}

protected void CheckBox2_CheckedChanged(object sender, EventArgs e)

{

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

{

CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");

if (CheckBox2.Checked == true)

{

cbox.Checked = true;

}

else

{

cbox.Checked = false;

}

}

}

protected void Button2_Click(object sender, EventArgs e)

{

sqlcon = new SqlConnection(strCon);

SqlCommand sqlcom;

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

{

CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");

if (cbox.Checked == true)

{

string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + GridView1.DataKeys[i].Value + "'";

sqlcom = new SqlCommand(sqlstr, sqlcon);

sqlcon.Open();

sqlcom.ExecuteNonQuery();

sqlcon.Close();

}

}

bind();

}

protected void Button1_Click(object sender, EventArgs e)

{

CheckBox2.Checked = false;

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

{

CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");

cbox.Checked = false;

}

}

public void bind()

{

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

sqlcon = new SqlConnection(strCon);

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds, "tb_Member");

GridView1.DataSource = myds;

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

GridView1.DataBind();

sqlcon.Close();

}

}

前台主要代码:

CellPadding="3" Font-Size="9pt" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px">

Text="全选" />

6.鼠标移到GridView某一行时改变该行的背景色方法一:

做法:

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)

{

    //首先判断是否是数据行

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

{

//当鼠标停留时更改背景色

e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#00A9FF'");

//当鼠标移开时还原背景色

e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c");

}

}

前台代码:

实现鼠标划过改变GridView的行背景色清清月儿http://blog.csdn.net/21aspnet

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

SelectCommand="SELECT top 5 [身份证号码], [姓名], [员工性别], [家庭住址], [邮政编码] FROM [飞狐工作室]" DataSourceMode="DataReader">

7.鼠标移到GridView某一行时改变该行的背景色方法二:

做法:和上面的一样就是代码不同

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

//如果是绑定数据行

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

{

//鼠标经过时,行背景色变

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

//鼠标移出时,行背景色变

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

}

}

8.GridView实现删除时弹出确认对话框:

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)

{

//如果是绑定数据行

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

{

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

{

((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?')");

}

}

}

9.GridView实现自动编号:

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)

{

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

{

int id = e.Row.RowIndex + 1;

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

}

}

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。

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

10.GridView实现自定义时间货币等字符串格式:

解决方法:

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

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

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、

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

HtmlEncode="false"

HeaderText="CreationDate" />

将htmlencode设置为false即可

另外的解决方法为,使用模版列

Text='<%# Eval("CreationDate", "{0:M-dd-yyyy}") %>'>

Text=’<%# Bind("CreationDate", "{0:M-dd-yyyy}") %>'>

前台代码:

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

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">

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:

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++)

{

DataRowView mydrv;

string gIntro;

if (GridView1.PageIndex == 0)

{

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

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

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

}

else

{

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

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

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

}

}

调用的方法:

public string SubStr(string sString, int nLeng)

{

if (sString.Length <= nLeng)

{

return sString;

}

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

sNewStr = sNewStr + "...";

return sNewStr;

}

12.GridView一般换行与强制换行:

首先设置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)

{

//正常换行

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

//下面这行是自动换行

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

if (!IsPostBack)

{

bind();//调用数据绑定即可

}

}

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:

解决方案:

public void bind()

{

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

sqlcon = new SqlConnection(strCon);

SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds, "飞狐工作室");

GridView1.DataSource = myds;

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

GridView1.DataBind();

sqlcon.Close();

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

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

}

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)

{

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

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

}

注意:CheckBox1的AutoPostBack要True!

14.GridView弹出新页面:

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

DataNavigateUrlFields是链接的字段名,DataNavigateUrlFormatString是路径。

15.GridView固定表头(不用javascript只用CSS!,很好用)

代码:

GridView固定表头 清清月儿http://blog.csdn.net/21aspnet

OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" OnRowCreated="GridView1_RowCreated" >

用法:CSS设如上的样式,HeaderStyle加CssClass="Freezing,套住GridView的Div设置高度宽度

16.GridView合并表头多重表头无错完美版(以合并33行举例)

后台代码:

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)

{

switch (e.Row.RowType)

{

case DataControlRowType.Header:

//第一行表头

TableCellCollection tcHeader = e.Row.Cells;

tcHeader.Clear();

tcHeader.Add(new TableHeaderCell());

tcHeader[0].Attributes.Add("rowspan", "3"); //跨Row

tcHeader[0].Attributes.Add("bgcolor", "white");

tcHeader[0].Text = "";

tcHeader.Add(new TableHeaderCell());

//tcHeader[1].Attributes.Add("bgcolor", "Red");

tcHeader[1].Attributes.Add("colspan", "6"); //跨Column

tcHeader[1].Text = "全部信息



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