个人的web开发心得（四）----------非常适合入门新手，都是常识
2006-09-22 14:05
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31.SQL关于日期的操作.
Dateadd(wk,datediff(wk,0,getdate()),-1)
Dateadd(wk,datediff(wk,0,getdate()),6)
Dateadd(mm,datediff(mm,0,getdate()),0)
Dateadd(ms,-3,dateadd(mm,datediff(m,0,getdate())+1,0))
Dateadd(yy,datediff(yy,0,getdate()),0)
Dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate())+1, 0))
32.关于模态窗口(showModalDialog)的专题讨论! 详细见模态窗口压缩包
1.模态窗口的打开
2.模态窗口的关闭
3.模态窗口的传递参数。
4.其他。。。。
1.window.showModalDialog("DialogPage.aspx","newwin","dialogHeight: 200px; dialogWidth: 150px; dialogTop: 458px; dialogLeft: 166px; edge: Raised; center: Yes; help: Yes; resizable: Yes; status: Yes;");
2.window.close();
3.传值
ParentPage.aspx:
window.showModalDialog("DialogPage.aspx?para1=aaa¶2=bbb");
DialogPage.aspx:
string str1=Request.QueryString["para1"].toString();
string str2=Request.QueryString["para2"].toString();
返回值
DialogPage.aspx:
window.returnValue="aaa";
ParentPage.aspx:
<script language="jscript">
function DeptReturn()
{
var result = window.showModalDialog('DialogPage.aspx','','width=700,height=400,top=150,left=200,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no');
if (result)
{
document.aspnetForm.ctl00_contentplaceHolder1_TextBox3.value=result; //在master页面下控件的名是这样,非master的页面 var tb=document.getElementById ("文本框控件名txtAssessid"); tb.value = result;
}
}
</script>
ParentPage.aspx.cs
ButtonDept.Attributes["onclick"] = "return DeptReturn();";
4.
aspx页面在showmodeldialog情况下为什么一提交就重新打开一个页面?
showmodaldialog打开的页面中在<head></head>之间加入一行：<base target="_self">
33.gridview 表中表 数据绑定.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) //在绑定以后执行
{
if (e.Row.RowType == DataControlRowType.DataRow) //是数据行的话
{
string _sql = "select * from Year_ComPlanAllotStandard where PlanId='" + e.Row.Cells[0].Text + "'";// 找到 是绑定 哪一行的记录
GridView TempGridView = new GridView(); //创建一个gridview
TempGridView = (GridView)e.Row.FindControl("GridViewStandard"); //将模板列中的gridview绑定到新建的girdview上
DataSet ds = DBC.ExecuDataSet(_sql); //绑定数据.
TempGridView.DataSource = ds;
TempGridView.DataBind();
}
}
34.对 gridview 的记录进行删除和更新
#region 绑定删除确认到 删除按钮
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
if ((e.Row.RowType != DataControlRowType.Footer) && (e.Row.RowType != DataControlRowType.Header) && (e.Row.RowType != DataControlRowType.Pager))
{
e.Row.Cells[12].Attributes.Add("onclick", "return confirm('您确认要删除这条指标吗？')");
}
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string _sql = "delete Year_complanallot where id='" + GridView1.Rows[e.RowIndex].Cells[0].Text + "'";
bool _bool = DBC.Excusql(_sql);
BuildGridView();
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Edit")
{
int index = Convert.ToInt32(e.CommandArgument);
string id = GridView1.Rows[index].Cells[0].Text;
Response.Redirect("Year_ComPlanAllotListAddEdit.aspx?edittype=1&id=" + id.Trim());
}
}
#endregion
35. 创建事务 执行 并catch{回滚}
SqlConnection con = new SqlConnection(DBC.strconntstring);
SqlTransaction transaction;
con.Open();
SqlCommand command = con.CreateCommand();
transaction = con.BeginTransaction();
command.Connection = con;
command.Transaction = transaction;
try
{
_sql = "update year_complanallot set Dept='" + TextBox1.Text + "',SortID='" + TextBox2.Text + "',PlanID='" + TextBox6.Text + "',Content='" + TextBox3.Text + "',PlanName='" + TextBox4.Text + "',forecaseTime='" + TextBox5.Text + "' where id='" + id + "'";
command.CommandText = _sql;
command.ExecuteNonQuery();
_sql = "update year_complanallotStandard set planid='" + id + "',standard='" + TextBox7.Text + "',Grade='" + TextBox8.Text + "' where id='" + Label1.Text + "'";
command.CommandText = _sql;
command.ExecuteNonQuery();
_sql = "update year_complanallotStandard set planid='" + id + "',standard='" + TextBox9.Text + "',Grade='" + TextBox10.Text + "' where id='" + Label2.Text + "'";
command.CommandText = _sql;
command.ExecuteNonQuery();
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
}
finally
{
con.Close();
}
36. 获得 插入数据记录的id
string _sql="insert tablename(field....) values(value.....) select @@IDENTITY AS 'id'";
37.绑定日期 年
/// <summary>
/// 绑定时间日期到 list
/// </summary>
protected void BuildDateTime()
{
string sql = "select getdate() ";
DateTime dt = Convert.ToDateTime(DBC.ExecuScalar(sql));
year_DropDownList.Items.Add(Convert.ToString(dt.Year - 2));
year_DropDownList.Items.Add(Convert.ToString(dt.Year - 1));
year_DropDownList.Items.Add(Convert.ToString(dt.Year));
year_DropDownList.Items.Add(Convert.ToString(dt.Year + 1));
year_DropDownList.Items.Add(Convert.ToString(dt.Year + 2));
#region 选择dropdownlist 为 当前日期
year_DropDownList.SelectedValue = dt.Year.ToString();
#endregion
}
38.根据记录内容 自动选取dropdownlist选项
DropDownList2.Items.FindByValue(dr["planID"].ToString()).Selected = true;
39.传递参数 到后面的页
Context.Items["zbbm"] = ((Label)e.Item.FindControl("zbbm")).Text.ToString();
Server.Transfer("year_kpikh.aspx");
等同于
Response.Redirect("year_complandetail.aspx&planid=1");
40.控制显示的数为两位 浮点型
LabelValue.Text = string.Format("{0:f2}", DKpiValue);
Dateadd(wk,datediff(wk,0,getdate()),-1)
Dateadd(wk,datediff(wk,0,getdate()),6)
Dateadd(mm,datediff(mm,0,getdate()),0)
Dateadd(ms,-3,dateadd(mm,datediff(m,0,getdate())+1,0))
Dateadd(yy,datediff(yy,0,getdate()),0)
Dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate())+1, 0))
32.关于模态窗口(showModalDialog)的专题讨论! 详细见模态窗口压缩包
1.模态窗口的打开
2.模态窗口的关闭
3.模态窗口的传递参数。
4.其他。。。。
1.window.showModalDialog("DialogPage.aspx","newwin","dialogHeight: 200px; dialogWidth: 150px; dialogTop: 458px; dialogLeft: 166px; edge: Raised; center: Yes; help: Yes; resizable: Yes; status: Yes;");
2.window.close();
3.传值
ParentPage.aspx:
window.showModalDialog("DialogPage.aspx?para1=aaa¶2=bbb");
DialogPage.aspx:
string str1=Request.QueryString["para1"].toString();
string str2=Request.QueryString["para2"].toString();
返回值
DialogPage.aspx:
window.returnValue="aaa";
ParentPage.aspx:
<script language="jscript">
function DeptReturn()
{
var result = window.showModalDialog('DialogPage.aspx','','width=700,height=400,top=150,left=200,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no');
if (result)
{
document.aspnetForm.ctl00_contentplaceHolder1_TextBox3.value=result; //在master页面下控件的名是这样,非master的页面 var tb=document.getElementById ("文本框控件名txtAssessid"); tb.value = result;
}
}
</script>
ParentPage.aspx.cs
ButtonDept.Attributes["onclick"] = "return DeptReturn();";
4.
aspx页面在showmodeldialog情况下为什么一提交就重新打开一个页面?
showmodaldialog打开的页面中在<head></head>之间加入一行：<base target="_self">
33.gridview 表中表 数据绑定.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) //在绑定以后执行
{
if (e.Row.RowType == DataControlRowType.DataRow) //是数据行的话
{
string _sql = "select * from Year_ComPlanAllotStandard where PlanId='" + e.Row.Cells[0].Text + "'";// 找到 是绑定 哪一行的记录
GridView TempGridView = new GridView(); //创建一个gridview
TempGridView = (GridView)e.Row.FindControl("GridViewStandard"); //将模板列中的gridview绑定到新建的girdview上
DataSet ds = DBC.ExecuDataSet(_sql); //绑定数据.
TempGridView.DataSource = ds;
TempGridView.DataBind();
}
}
34.对 gridview 的记录进行删除和更新
#region 绑定删除确认到 删除按钮
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
if ((e.Row.RowType != DataControlRowType.Footer) && (e.Row.RowType != DataControlRowType.Header) && (e.Row.RowType != DataControlRowType.Pager))
{
e.Row.Cells[12].Attributes.Add("onclick", "return confirm('您确认要删除这条指标吗？')");
}
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string _sql = "delete Year_complanallot where id='" + GridView1.Rows[e.RowIndex].Cells[0].Text + "'";
bool _bool = DBC.Excusql(_sql);
BuildGridView();
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Edit")
{
int index = Convert.ToInt32(e.CommandArgument);
string id = GridView1.Rows[index].Cells[0].Text;
Response.Redirect("Year_ComPlanAllotListAddEdit.aspx?edittype=1&id=" + id.Trim());
}
}
#endregion
35. 创建事务 执行 并catch{回滚}
SqlConnection con = new SqlConnection(DBC.strconntstring);
SqlTransaction transaction;
con.Open();
SqlCommand command = con.CreateCommand();
transaction = con.BeginTransaction();
command.Connection = con;
command.Transaction = transaction;
try
{
_sql = "update year_complanallot set Dept='" + TextBox1.Text + "',SortID='" + TextBox2.Text + "',PlanID='" + TextBox6.Text + "',Content='" + TextBox3.Text + "',PlanName='" + TextBox4.Text + "',forecaseTime='" + TextBox5.Text + "' where id='" + id + "'";
command.CommandText = _sql;
command.ExecuteNonQuery();
_sql = "update year_complanallotStandard set planid='" + id + "',standard='" + TextBox7.Text + "',Grade='" + TextBox8.Text + "' where id='" + Label1.Text + "'";
command.CommandText = _sql;
command.ExecuteNonQuery();
_sql = "update year_complanallotStandard set planid='" + id + "',standard='" + TextBox9.Text + "',Grade='" + TextBox10.Text + "' where id='" + Label2.Text + "'";
command.CommandText = _sql;
command.ExecuteNonQuery();
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
}
finally
{
con.Close();
}
36. 获得 插入数据记录的id
string _sql="insert tablename(field....) values(value.....) select @@IDENTITY AS 'id'";
37.绑定日期 年
/// <summary>
/// 绑定时间日期到 list
/// </summary>
protected void BuildDateTime()
{
string sql = "select getdate() ";
DateTime dt = Convert.ToDateTime(DBC.ExecuScalar(sql));
year_DropDownList.Items.Add(Convert.ToString(dt.Year - 2));
year_DropDownList.Items.Add(Convert.ToString(dt.Year - 1));
year_DropDownList.Items.Add(Convert.ToString(dt.Year));
year_DropDownList.Items.Add(Convert.ToString(dt.Year + 1));
year_DropDownList.Items.Add(Convert.ToString(dt.Year + 2));
#region 选择dropdownlist 为 当前日期
year_DropDownList.SelectedValue = dt.Year.ToString();
#endregion
}
38.根据记录内容 自动选取dropdownlist选项
DropDownList2.Items.FindByValue(dr["planID"].ToString()).Selected = true;
39.传递参数 到后面的页
Context.Items["zbbm"] = ((Label)e.Item.FindControl("zbbm")).Text.ToString();
Server.Transfer("year_kpikh.aspx");
等同于
Response.Redirect("year_complandetail.aspx&planid=1");
40.控制显示的数为两位 浮点型
LabelValue.Text = string.Format("{0:f2}", DKpiValue);
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