c# - Getting int from registry converted from string to int -
i've got program has remember user had located last time got closed. chose attempt registry, not know how convert value gotten registry.read int can set location form. here's have that:
modifyregistry myregistry = new modifyregistry(); (< field variable) private void robcsvkopieren_load(object sender, eventargs e) { location.x = ((int)myregistry.read("location.x")); } private void robcsvkopieren_locationchanged(object sender, eventargs e) { } private void robcsvkopieren_formclosing(object sender, formclosingeventargs e) { myregistry.write("location.x", location.x); myregistry.write("location.y", location.y); myregistry.write("size", size); } ps: experience registry absolutely 0, code registry modification site found multiple times on site.
pps. here modify registry class' code (you might notice haven't changed @ since afraid break it.:
/* *************************************** * modifyregistry.cs * --------------------------------------- * simple class * read, write, delete , count * registry values c# * --------------------------------------- * if improve code * please email me improvement! * --------------------------------------- * francesco natali * - fn.varie@libero.it - * ***************************************/ using system; // it's required reading/writing registry: using microsoft.win32; // , messagebox function: using system.windows.forms; namespace utility.modifyregistry { /// <summary> /// useful class read/write/delete/count registry keys /// </summary> public class modifyregistry { private bool showerror = false; /// <summary> /// property show or hide error messages /// (default = false) /// </summary> public bool showerror { { return showerror; } set { showerror = value; } } private string subkey = "software\\" + application.productname.toupper(); /// <summary> /// property set subkey value /// (default = "software\\" + application.productname.toupper()) /// </summary> public string subkey { { return subkey; } set { subkey = value; } } private registrykey baseregistrykey = registry.localmachine; /// <summary> /// property set baseregistrykey value. /// (default = registry.localmachine) /// </summary> public registrykey baseregistrykey { { return baseregistrykey; } set { baseregistrykey = value; } } /* ************************************************************************** * **************************************************************************/ /// <summary> /// read registry key. /// input: keyname (string) /// output: value (string) /// </summary> public string read(string keyname) { // opening registry key registrykey rk = baseregistrykey; // open subkey read-only registrykey sk1 = rk.opensubkey(subkey); // if registrysubkey doesn't exist -> (null) if (sk1 == null) { return null; } else { try { // if registrykey exists value // or null returned. return (string)sk1.getvalue(keyname.toupper()); } catch (exception e) { // aaaaaaaaaaargh, error! showerrormessage(e, "reading registry " + keyname.toupper()); return null; } } } /* ************************************************************************** * **************************************************************************/ /// <summary> /// write registry key. /// input: keyname (string) , value (object) /// output: true or false /// </summary> public bool write(string keyname, object value) { try { // setting registrykey rk = baseregistrykey; // have use createsubkey // (create or open if exits), // 'cause opensubkey open subkey read-only registrykey sk1 = rk.createsubkey(subkey); // save value sk1.setvalue(keyname.toupper(), value); return true; } catch (exception e) { // aaaaaaaaaaargh, error! showerrormessage(e, "writing registry " + keyname.toupper()); return false; } } /* ************************************************************************** * **************************************************************************/ /// <summary> /// delete registry key. /// input: keyname (string) /// output: true or false /// </summary> public bool deletekey(string keyname) { try { // setting registrykey rk = baseregistrykey; registrykey sk1 = rk.createsubkey(subkey); // if registrysubkey doesn't exists -> (true) if (sk1 == null) return true; else sk1.deletevalue(keyname); return true; } catch (exception e) { // aaaaaaaaaaargh, error! showerrormessage(e, "deleting subkey " + subkey); return false; } } /* ************************************************************************** * **************************************************************************/ /// <summary> /// delete sub key , child. /// input: void /// output: true or false /// </summary> public bool deletesubkeytree() { try { // setting registrykey rk = baseregistrykey; registrykey sk1 = rk.opensubkey(subkey); // if registrykey exists, delete if (sk1 != null) rk.deletesubkeytree(subkey); return true; } catch (exception e) { // aaaaaaaaaaargh, error! showerrormessage(e, "deleting subkey " + subkey); return false; } } /* ************************************************************************** * **************************************************************************/ /// <summary> /// retrive count of subkeys @ current key. /// input: void /// output: number of subkeys /// </summary> public int subkeycount() { try { // setting registrykey rk = baseregistrykey; registrykey sk1 = rk.opensubkey(subkey); // if registrykey exists... if (sk1 != null) return sk1.subkeycount; else return 0; } catch (exception e) { // aaaaaaaaaaargh, error! showerrormessage(e, "retriving subkeys of " + subkey); return 0; } } /* ************************************************************************** * **************************************************************************/ /// <summary> /// retrive count of values in key. /// input: void /// output: number of keys /// </summary> public int valuecount() { try { // setting registrykey rk = baseregistrykey; registrykey sk1 = rk.opensubkey(subkey); // if registrykey exists... if (sk1 != null) return sk1.valuecount; else return 0; } catch (exception e) { // aaaaaaaaaaargh, error! showerrormessage(e, "retriving keys of " + subkey); return 0; } } /* ************************************************************************** * **************************************************************************/ private void showerrormessage(exception e, string title) { if (showerror == true) messagebox.show(e.message, title , messageboxbuttons.ok , messageboxicon.error); } } }
is conversion int that's problem here? if yes should use:
location.x = convert.toint32(myregistry.read("location.x")); note: if it's not int value, formatexception avoid can use:
int locationx; var success = int32.tryparse(myregistry.read("location.x"), out locationx); if(success) location.x = locationx; else location.x = // defaultvalue
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