Girdview一些技术
Tag:几乎集Girdview所有技术为一体的超级变形金刚
1.GridView动态创建控件，而且回发不会消失，绑定事件依然有效。
2.分页，动态添加页脚页码控件，且绑定事件
3.在最合适的地方动态注册添加js事件
4.实现删除、编辑、插入、查找、更新"、取消、新建、选择等事件
5.动态创建模板列，含编辑模板列
6.自定义点击表头排序
7.最合适的地方动态添加css样式
- <asp:GridView ID="GridView1" runat="server"
- OnRowUpdating="GridView1_RowUpdating"
- onrowcancelingedit="GridView1_RowCancelingEdit"
- onrowediting="GridView1_RowEditing"
- onsorting="GridView1_Sorting" AllowSorting="True"
- ondatabound="GridView1_DataBound" onrowdatabound="GridView1_RowDataBound"
- onsorted="GridView1_Sorted" AutoGenerateColumns="false"
- ondatabinding="GridView1_DataBinding" oninit="GridView1_Init"
- onload="GridView1_Load" onrowupdated="GridView1_RowUpdated"
- ondisposed="GridView1_Disposed" onpageindexchanged="GridView1_PageIndexChanged"
- onpageindexchanging="GridView1_PageIndexChanging"
- onprerender="GridView1_PreRender" onrowcommand="GridView1_RowCommand"
- onrowcreated="GridView1_RowCreated" onrowdeleted="GridView1_RowDeleted"
- onrowdeleting="GridView1_RowDeleting"
- onselectedindexchanged="GridView1_SelectedIndexChanged"
- onselectedindexchanging="GridView1_SelectedIndexChanging"
- onunload="GridView1_Unload" AllowPaging="True" PageSize="3" >
- </asp:GridView>
cs文件代码
using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Reflection;
namespace a.b.c
{
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void GridView1_Init(object sender, EventArgs e)
{
DataTable dt = new DataTable("ttt");
dt.Columns.Add("c1");
dt.Columns.Add("c2", typeof(int));
dt.Columns.Add("c3");
dt.Rows.Add("1", 11, "r1811");
dt.Rows.Add("2", 21, "rkey2");
dt.Rows.Add("3", 1131, "r1113");
dt.Rows.Add("4", 41, "r1181");
dt.Rows.Add("5", 51, "rkey22");
dt.Rows.Add("6", 613, "r11413");
dt.Rows.Add("7", 71, "r1115");
ViewState["dt"] = dt;
GridView gv = (GridView)sender;
int index = -1;
foreach (DataColumn dc in dt.Columns)
{
BoundField bf = new BoundField();
bf.HeaderText = dc.ColumnName;
bf.DataField = dc.ColumnName;
bf.SortExpression = dc.ColumnName;
gv.Columns.Insert(++index, bf);
}
TemplateField tf = new TemplateField();
tf.ItemTemplate = new GridViewTemplate(DataControlRowType.DataRow, "编辑", false)
{
eddhander=new EventHandler(btn_Click)
};
tf.EditItemTemplate = new GridViewTemplate(DataControlRowType.DataRow, "更新", true);
gv.Columns.Add(tf);
CommandField cd = new CommandField();
cd.HeaderText = "综合操作";
cd.InsertText = "插入";
cd.DeleteText = "删除";
cd.EditText = "编辑";
cd.SelectText = "查找";
cd.UpdateText = "更新";
cd.CancelText = "取消";
cd.NewText = "新建";
cd.SelectText = "选择";
cd.ButtonType = ButtonType.Button;
cd.ShowInsertButton = cd.ShowDeleteButton = cd.ShowEditButton
= cd.ShowSelectButton = cd.ShowCancelButton = cd.ShowSelectButton = true;
gv.Columns.Add(cd);
}
void btn_Click(object sender, EventArgs e)//自定义按钮事件
{
Response.Write(DateTime.Now.ToString());
}
protected void GridView1_Load(object sender, EventArgs e)
{
GridView gv = (GridView)sender;
if (!IsPostBack)
{
gv.DataBind();
}
}
protected void GridView1_DataBinding(object sender, EventArgs e)
{
GridView gv = (GridView)sender;
DataTable dt = ViewState["dt"] as DataTable;
DataCount = dt.Rows.Count;
DataView dv = new DataView(dt);
if (ViewState["sortstr"] != null && ViewState["sortstr"].ToString().Length > 0)
{
dv.Sort = ViewState["sortstr"].ToString();
}
gv.DataKeyNames = new[] { "c1" };
gv.DataSource = dv;
}
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='teal'");
e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=''");
foreach (DataControlFieldCell fc in e.Row.Cells)
{
foreach (Control c in fc.Controls)
{
if (c is Button && (c as Button).CommandName == "Delete")
{
(c as Button).Attributes.Add("onclick", "if(!confirm('您确定删除该项吗?')) return;");
}
}
}
}
else if (e.Row.RowType == DataControlRowType.Footer)
{
GridView gv = (GridView)sender;
DropDownList dp = new DropDownList();
for (int i = 0; i < gv.PageCount; i++)
{
dp.Items.Add(new ListItem((i + 1).ToString(), i.ToString()));
}
dp.AutoPostBack = true;
dp.SelectedIndexChanged += new EventHandler(dp_SelectedIndexChanged);
dp.SelectedValue = gv.PageIndex.ToString();
e.Row.Cells[0].Controls.Add(dp);
}
//引发GridView1_RowDataBound
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//下面的代码可以写在GridView1_RowCreated中
//e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='red'");
//e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=''");
foreach (TableCell tc in e.Row.Cells)
{
if (tc.Text.Contains("key"))
{
tc.Text = tc.Text.Replace("key", "<font color=red>key</font>");
}
}
//tc.Attributes.Add("style","color:red");
}
}
protected void GridView1_DataBound(object sender, EventArgs e)
{
//在绑定完所有数据后触发
GridView gv = (GridView)sender;
int count = gv.Rows.Count;
if (count > 0 && count % gv.PageSize > 0)
{
for (int i = 0; i < gv.PageSize - count % gv.PageSize; i++)
{
//dt.Rows.Add(dt.NewRow());
GridViewRow row = new GridViewRow(-1, -1, DataControlRowType.DataRow, DataControlRowState.Normal);
for (int j = 0; j < gv.Rows[0].Cells.Count; j++)
{
TableCell cell = new TableCell();
cell.Text = "?";
row.Cells.Add(cell);
}
gv.FooterRow.Controls[0].Controls.Add(row);
}
}
}
protected void GridView1_PreRender(object sender, EventArgs e)
{
GridView gv = (GridView)sender;
gv.Attributes.Add("style", "border:solid 2px yellow");
//可以注册js到客户端
//客户端脚本,响应网页的onunload事件
//this.ClientScript.RegisterClientScriptBlock(this.GetType(),
//"unload", "<SCRIPT event='onunload' for='window'>alert('页面卸载');</SCRIPT>");
}
protected void GridView1_Unload(object sender, EventArgs e)
{
ViewState.Remove("dt");
}
protected void GridView1_Disposed(object sender, EventArgs e)
{
//XXXXX.Dispose();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView gv = (GridView)sender;
gv.AllowSorting = false;
gv.EditIndex = e.NewEditIndex;
gv.DataBind();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
DataTable dt = ViewState["dt"] as DataTable;
dt.Rows[e.RowIndex]["c1"] = (GridView1.Rows[e.RowIndex].Cells[0].Controls[0] as TextBox).Text;
dt.Rows[e.RowIndex]["c2"] = (GridView1.Rows[e.RowIndex].Cells[1].Controls[0] as TextBox).Text;
dt.Rows[e.RowIndex]["c3"] = (GridView1.Rows[e.RowIndex].Cells[2].Controls[0] as TextBox).Text;
ViewState["dt"] = dt;
GridView gv = (GridView)sender;
gv.AllowSorting = true;
gv.EditIndex = -1;
gv.DataBind();
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView gv = (GridView)sender;
gv.AllowSorting = true;
gv.EditIndex = -1;
gv.DataBind();
}
protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
//e.KeepInEditMode = false;
//在没有绑定DataSourceID的情况下，暂时确定为不会触发
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
DataTable dt = ViewState["dt"] as DataTable;
dt.Rows[e.RowIndex].Delete();
ViewState["dt"] = dt;
GridView gv = (GridView)sender;
gv.DataBind();
}
protected void GridView1_RowDeleted(object sender, GridViewDeletedEventArgs e)
{
//在没有绑定DataSourceID的情况下，暂时确定为不会触发
}
protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
{
GridView gv = (GridView)sender;
gv.SelectedIndex = e.NewSelectedIndex;
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView gv = (GridView)sender;
gv.PageIndex = e.NewPageIndex;
}
protected void GridView1_PageIndexChanged(object sender, EventArgs e)
{
//分页事件，绑定数据
GridView gv = (GridView)sender;
gv.DataBind();
}
protected void dp_SelectedIndexChanged(object sender, EventArgs e)
{
DropDownList dp = (DropDownList)sender;
GridView1.PageIndex = int.Parse(dp.SelectedValue);
//GridView1.EditIndex = -1;
GridView1.DataBind();
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
GridView gv = (GridView)sender;
foreach (GridViewRow r in gv.Rows)
{
r.Font.Size = r.RowIndex == gv.SelectedIndex ? new FontUnit(16) : new FontUnit(12);
}
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
GridView gv = (GridView)sender;//或者 GridView gv = (GridView)e.CommandSource;
}
protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
//Type t = sender.GetType();
//BindingFlags flag = BindingFlags.NonPublic | BindingFlags.Instance;
//t.GetProperty("SortExpressionInternal", flag).SetValue(sender, e.SortExpression, null);
//t.GetProperty("SortDirectionInternal", flag).SetValue(sender, e.SortDirection, null);
SortOrder = SortOrder == "asc" ? "desc" : "asc";
SortColumn = e.SortExpression;
ViewState["sortstr"] = SortColumn + " " + SortOrder;
GridView gv = (GridView)sender;
gv.DataBind();
}
protected void GridView1_Sorted(object sender, EventArgs e)
{
GridView gv = (GridView)sender;
for (int i = 0; i < gv.Columns.Count; i++)
{
if (gv.Columns[i].SortExpression == SortColumn)
{
gv.HeaderRow.Cells[i].Controls.Add(new Literal() { Text = SortOrder == "asc" ? "↑" : "↓" });
}
}
}
int DataCount
{
get
{
var obj = ViewState["DataCount"];
if (obj != null)
{
return (int)obj;
}
return 0;
}
set
{
ViewState["DataCount"] = value;
}
}
string SortOrder
{
get
{
var obj = ViewState["SortOrder"];
if (obj != null)
{
return (string)obj;
}
return "asc";
}
set
{
ViewState["SortOrder"] = value;
}
}
string SortColumn
{
get
{
var obj = ViewState["SortColumn"];
if (obj != null)
{
return (string)obj;
}
return string.Empty;
}
set
{
ViewState["SortColumn"] = value;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
Response.Write(DateTime.Now.ToString());
}
}
public class GridViewTemplate : ITemplate
{
private DataControlRowType templateType;
private string columnName;
bool IsEditTemplate;
public EventHandler eddhander;
public GridViewTemplate(DataControlRowType type, string colname, bool _IsEditTemplate)
{
templateType = type;
columnName = colname;
IsEditTemplate = _IsEditTemplate;
}
public void InstantiateIn(System.Web.UI.Control container)
{
switch (templateType)
{
case DataControlRowType.Header:
Literal lc = new Literal();
lc.Text = columnName;
container.Controls.Add(lc);
break;
case DataControlRowType.DataRow:
if (IsEditTemplate)
{
Button btn1 = new Button();
btn1.CausesValidation = true;
btn1.CommandName = "Update";
btn1.Text = "更新";
Button btn2 = new Button();
btn2.CausesValidation = false;
btn2.CommandName = "Cancel";
btn2.Text = "取消";
container.Controls.Add(btn1);
container.Controls.Add(btn2);
}
else
{
Button btn3 = new Button();
btn3.CausesValidation = false;
btn3.CommandName = "Edit";
btn3.Text = "编辑";
Button mmm = new Button();
mmm.Click += eddhander;//添加事件
mmm.Text = "我自定义的按钮，可输出时间";
container.Controls.Add(mmm);
container.Controls.Add(btn3);
}
break;
default:
break;
}
}
}
}