Render,RenderChildren,RenderControl

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protected

internal

virtual

void

Render
(HtmlTextWriter writer)
{

this
.RenderChildren(writer);
}

protected

internal

virtual

void

RenderChildren
(HtmlTextWriter writer)
{

ICollection children
=
(
this
._occasionalFields
==

null
)
?

null
: ((ICollection)
this
._occasionalFields.Controls);

this
.RenderChildrenInternal(writer, children);
}

internal

void
RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
{


if
((
this
.RareFields
!=

null
)
&&
(
this
.RareFields.RenderMethod
!=

null
))
    {

        writer.BeginRender();

this
.RareFields.RenderMethod(writer,
this
);
        writer.EndRender();
    }

else

if
(children
!=

null
)
    {


foreach
(Control control
in
children)
        {

            control.RenderControl(writer);
        }
    }
}

public

virtual

void

RenderControl
(HtmlTextWriter writer)
{

this
.RenderControl(writer,
this
.Adapter);
}

protected

void
RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
{


if
(
!
this
.flags[
0x10
]
&&

!
this
.flags[
0x200
])
    {

        HttpContext context
=
(
this
.Page
==

null
)
?

null
:
this
.Page._context;

if
((context
!=

null
)
&&
context.TraceIsEnabled)
        {


int
bufferedLength
=
context.Response.GetBufferedLength();

this
.RenderControlInternal(writer, adapter);

int
num2
=
context.Response.GetBufferedLength();
            context.Trace.AddControlSize(
this
.UniqueID, num2
–
bufferedLength);
        }

else

        {


this
.RenderControlInternal(writer, adapter);
        }
    }
}

private

void
RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
{


if
(adapter
!=

null
)
    {

        adapter.BeginRender(writer);
        adapter.Render(writer);
        adapter.EndRender(writer);
    }

else

    {


this
.Render(writer);
    }
}

Render—–>RenderChilds—->RenderControl——Render

一个重写Render的例子:

protected

override

void
Render(HtmlTextWriter pOutPut)
        {

            pOutPut.Write(
“
<Div Class=\”TabControl tab-pane\” ID=\”
“

+

this
.UniqueID
+

“
_Tab\” Style=\”
“

+
EPWebControl.GetControlStyle(
this
.Width,
base
.Style)
+

“
\”>
“
);

//
隐藏的控件


this
.SelectedTab.RenderControl(pOutPut);

//
标签头部

            pOutPut.Write(
“
<DIV Class=\”tab-row\”>
“
);

this
.RenderTabButton(pOutPut);
            pOutPut.Write(
“
</Div><Div>
“
);

//
标签内容


this
.RenderTabContent(pOutPut);
            pOutPut.Write(
“
</Div></Div>
“
);
        }

private

void
RenderTabButton(HtmlTextWriter pOutPut)
        {


for
(
int
num1
=

0
; num1
<

this
.Items.Count; num1
++
)
                {


if
(
this
.Items[num1].Visible
==

true
)
                    {


if
(
this
.Items[num1].Selected)
                        {

                            pOutPut.Write(
“
<H2 class=\”tab hover selected\” onMouseOver=\”Tab_OnMouseOver(this)\” onMouseOut=\”Tab_OnMouseOut(this)\”>
“

+

this
.Items[num1].Caption
+

“
</H2>
“
);
                        }

else

                        {

                            pOutPut.Write(
“
<H2 class=\”tab\” onMouseOver=\”Tab_OnMouseOver(this)\” onMouseOut=\”Tab_OnMouseOut(this)\” onClick=\”Tab_OnSelectServerClick(this,’
“

+

this
.Items[num1].UniqueID
+

“
‘);
“

+

this
.Page.GetPostBackEventReference(
this
,
“”
)
+

“
\”>
“

+

this
.Items[num1].Caption
+

“
</H2>
“
);
                        }
                    }
                }

        }

private

void
RenderTabContent(HtmlTextWriter pOutPut)
        {


for
(
int
i
=

0
; i
<

this
.Items.Count; i
++
)
            {


if
(
this
.Items[i].Visible
==

true
)
                {


this
.Items[i].RenderControl(pOutPut);
                }
            }
        }

item的 Render

protected

override

void
Render(HtmlTextWriter pOutPut)
        {


if
(
this
.Visible)
            {


if
(
this
.Selected)
                {

                    pOutPut.Write(
string
.Concat(
new

object
[] {
“
<DIV id=\”
“
,
this
.UniqueID,
“
\” class=\”tab-page\” style=\”Height:
“
,
this
._Owner.Height,
“
;Width:100%;DISPLAY: block\”>
“
}));
                }

else

                {

                    pOutPut.Write(
string
.Concat(
new

object
[] {
“
<DIV id=\”
“
,
this
.UniqueID,
“
\” class=\”tab-page\” style=\”Height:
“
,
this
._Owner.Height,
“
;Width:100%;DISPLAY: none\”>
“
}));
                }
            }

this
.RenderChildren(pOutPut);
            pOutPut.Write(
“
</DIV>
“
);
        }

转载于:https://www.cnblogs.com/kasafuma/archive/2011/04/06/2006666.html

发布者：全栈程序员-站长，转载请注明出处：https://javaforall.net/162033.html原文链接：https://javaforall.net