完全代码实现GridView删除按钮提示

今天终于实现了完全代码下使GridView中的删除按钮实现删除提示的功能。

首先，HTML代码：

<asp:GridView ID="SubjectGrid" runat="server">
</asp:GridView>
第二步，初始化GridView Columns：

void Page_Load(Object sender, EventArgs e)
{
ShowGrid();
}

private void ShowGrid()
{
DataTable customerTable = new DataTable("Customers");

grdSubject.AutoGenerateColumns = false;
grdSubject.ShowHeader = false;
grdSubject.DataKeyNames = new String[] { "Id" };
DataControlFieldCollection dcfc = grdSubject.Columns;
dcfc.Clear();
BoundField bf;

bf = new BoundField();
bf.DataField = "Id";
bf.Visible = false;
dcfc.Add(bf);

bf = new BoundField();
bf.DataField = "Title";
dcfc.Add(bf);

bf = new BoundField();
bf.DataField = "BeginDate";
bf.SortExpression = "BeginDate";
bf.HtmlEncode = false;
bf.DataFormatString = "{0:yyyy-MM-dd}";
dcfc.Add(bf);

bf = new BoundField();
bf.DataField = "EndDate";
bf.HtmlEncode = false;
bf.DataFormatString = "{0:yyyy-MM-dd}";
dcfc.Add(bf);

ButtonField selectRow = new ButtonField();
selectRow.ButtonType = ButtonType.Button;
selectRow.CommandName = "Select";
selectRow.Text = "选择";
dcfc.Add(selectRow);

ButtonField delRow = new ButtonField();
delRow.ButtonType = ButtonType.Button;
delRow.AccessibleHeaderText = "Delete";
delRow.CommandName = "Delete";
delRow.Text = "删除";
delRow.CausesValidation = true;
dcfc.Add(delRow);

grdSubject.DataSource = dt.DefaultView;
grdSubject.DataBind();
}
第三步：RowDataBound

void grdSubject_RowDataBound(object sender, GridViewRowEventArgs e)
{
//判断是否是DataRow
if (e.Row.RowType == DataControlRowType.DataRow)
{
//鼠标经过Row时的效果
e.Row.Attributes.Add("onmouseover", "e=this.style.backgroundColor; this.style.backgroundColor='linen'");
e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=e");

//当开始时间大于现在时间，显示行为蓝色
if (DateTime.Parse(e.Row.Cells[2].Text) > DateTime.Now)
{
e.Row.BackColor = Color.LightSkyBlue;
}
//当结束时间小于现在时间，显示行为灰色
if (DateTime.Parse(e.Row.Cells[3].Text) < DateTime.Now)
{
e.Row.BackColor = Color.Silver;
}

//当点击删除按钮时激活提示
Button btn = (Button)e.Row.Cells[5].Controls[0];
btn.Attributes.Add("onclick", "javascript:return confirm('你确认要删除：\"" + e.Row.Cells[1].Text + "\"吗?')");
}
}
其中的关键是Button btn=(Button)e.Row.Cells[5].Controls[0]; 即声明此事件是由第6列中的第一个控件调用。

第四步：执行

void grdSubject_RowDeleting(object sender, GridViewDeleteEventArgs e)
{

}

void grdSubject_RowCommand(object sender, GridViewCommandEventArgs e)
{
//单击Grid中按钮时发生throw new Exception("The method or operation is not implemented.");
int selIndex = Convert.ToInt32(e.CommandArgument);
GridViewRow selectedRow = grdSubject.Rows[selIndex];

if (e.CommandName == "Select")
{
txtSubjectTitle.Text = selectedRow.Cells[1].Text;
dateBegin.Value = selectedRow.Cells[2].Text;
dateEnd.Value = selectedRow.Cells[3].Text;

}
if (e.CommandName == "Delete")
{
Hsf.Touch.Dto.Subject item = new Hsf.Touch.Dto.Subject();
item.Id = int.Parse(grdSubject.DataKeys[selIndex].Value.ToString());
try
{
TouchFactory.CreateSubjectManage().Delete(item);
//删除成功，清除输入框内容
Clear();
}
catch (Exception err)
{
ShowMessageBox("删除失败 \n" + err.Message);
}
}

ShowGrid();
}