C # app. config

After entering the company for more than a year, I have added many parameters to the configuration file, but I never thought about how these parameters are read. Today I have read the parameters and gained a lot. Suppose there is app. config as follows:

<? XML version = "1.0" encoding = "UTF-8"?>
<Configuration>
<Configsections>
<Section name = "family" type = "firstrowtest. configuration. settings, firstrowtest"/>
</Configsections>
<Family>
<Familymember>
<Member status = "father"
Birth = "1954"
Name = "AA"
Holobby = "reading books">
</Member>
<Member status = "mother"
Birth = "1958"
Name = "BB"
Holobby = "chatting">
</Member>
<Member status = "elder brother"
Birth = "1982"
Name = "cc"
Holobby = "money">
</Member>
<Member status = "younger brother"
Birth = "1986"
Name = "DD"
Holobby = "computer">
</Member>
</Familymember>
</Family>
<Deleetask>
<Add key = "Address" value = "Maling"/>
</Appsettings>
</Configuration>

Structure:

Public class Param: system. configuration. configurationelement
{
[System. configuration. configurationproperty ("status")]
Public String status
{
Get
{
Return this ["status"] as string;
}
Set
{
This ["status"] = value;
}
}
[System. configuration. configurationproperty ("birth")]
Public String birth
{
Get
{
Return this ["birth"] as string;
}
Set
{
This ["birth"] = value;
}
}
[System. configuration. configurationproperty ("name")]
Public string name
{
Get
{
Return this ["name"] as string;
}
Set
{
This ["name"] = value;
}
}
[System. configuration. configurationproperty ("holobby")]
Public String holobby
{
Get
{
Return this ["holobby"] as string;
}
Set
{
This ["holobby"] = value;
}
}
}

Public class Params: system. configuration. configurationelementcollection
{
Protected override system. configuration. configurationelement createnewelement ()
{
Return new param ();
}
Protected override object getelementkey (system. configuration. configurationelement element)
{
Param = element as Param;
Return Param. status;
}
Protected override string elementname
{
Get
{
Return "member ";
}
}
Public override system. configuration. configurationelementcollectiontype collectiontype
{
Get
{
Return System. configuration. configurationelementcollectiontype. basicmap;
}
}

}

Public class settings: system. configuration. configurationsection
{
[System. configuration. configurationproperty ("familymember")]
Public Params familymember
{
Get
{
Return this ["familymember"] As Params;
}
Set
{
This ["familymember"] = value;
}
}
}

Call:

Public frmmain ()
{
Initializecomponent ();
}
Private void frmmain_load (Object sender, eventargs E)
{
System. configuration. Configuration CFG = system. configuration. configurationmanager. openexeconfiguration (system. configuration. configurationuserlevel. None );
// Settings setting = cfg. getsection ("family") as settings;
Settings setting = system. configuration. configurationmanager. getsection ("family") as settings;
Param first = NULL;
If (null! = Setting)
{
Foreach (Param P in setting. familymember)
{
If (null = first)
{
First = P;
}
This. richtextbox1.appendtext (string. Format ("status: {0} | birth: {1} | Name: {2} | holobby: {3} \ r \ n ",

P. Status, P. Birth, P. Name, P. holobby ));
}
}
// Cfg. Save ();
System. configuration. configurationmanager. refreshsection ("family ");
}
}

If you want to save it, there is a slight change in processing:

Public partial class frmmain: Form
{
Public frmmain ()
{
Initializecomponent ();
}
Private void frmmain_load (Object sender, eventargs E)
{
System. configuration. Configuration CFG = system. configuration. configurationmanager. openexeconfiguration (system. configuration. configurationuserlevel. None );
Settings setting = cfg. getsection ("family") as settings;
// Settings setting = system. configuration. configurationmanager. getsection ("family") as settings;
Param first = NULL;
If (null! = Setting)
{
Foreach (Param P in setting. familymember)
{
If (null = first)
{
First = P;
}
This. richtextbox1.appendtext (string. Format ("status: {0} | birth: {1} | Name: {2} | holobby: {3} \ r \ n ",

P. Status, P. Birth, P. Name, P. holobby ));
}
}

First. Name = "I dont know ";
Cfg. Save ();
// System. configuration. configurationmanager. refreshsection ("family ");
}

Save the result:

<? XML version = "1.0" encoding = "UTF-8"?>
<Configuration>
<Configsections>
<Section name = "family" type = "firstrowtest. configuration. settings, firstrowtest"/>
</Configsections>
<Family>
<Familymember>
<Member status = "father" Birth = "1954" name = "I dont know" holobby = "reading books"/>
<Member status = "mother" Birth = "1958" name = "BB" Hober = "chatting"/>
<Member status = "elder brother" Birth = "1982" name = "cc" holobby = "money"/>
<Member status = "younger brother" Birth = "1986" name = "DD" holobby = "computer"/>
</Familymember>
</Family>
<Deleetask>
<Add key = "Address" value = "Maling"/>
</Appsettings>
</Configuration>