if statement - How to break if-else-if using C# -


how break if-else-if.....why not working? checking conditions instead of performing tasks. following code. have checked through breakpoints moving conditions why doesn't stop after meeting correct condition. not going if activity read conditions , nothing @ end.

private void showhash()     {         inpic = pb_selected.image;         bitmap image = new bitmap(inpic);         byte[] imgbytes = new byte[0];         imgbytes = (byte[])converter.convertto(image, imgbytes.gettype());         string hash = computehashcode(imgbytes);         txt_selectedtext.text = hash;         gethash();     }  private void gethash()     {         if (txt_sel1.text == null && (txt_sel2.text == null || txt_sel3.text == null || txt_sel4.text == null || txt_sel5.text == null ))         {             txt_sel1.text = txt_selectedtext.text;             return;         }          else if (txt_sel1.text != null && (txt_sel2.text == null || txt_sel3.text == null || txt_sel4.text == null || txt_sel5.text == null))         {             txt_sel2.text = txt_selectedtext.text;             return;         }          else if (txt_sel2.text != null && (txt_sel3.text == null || txt_sel4.text == null || txt_sel5.text == null))         {             txt_sel3.text = txt_selectedtext.text;             return;         }          else if (txt_sel3.text != null && (txt_sel4.text == null || txt_sel5.text == null))         {             txt_sel4.text = txt_selectedtext.text;             return;         }          else if (txt_sel4.text != null && (txt_sel5.text == null))         {             txt_sel5.text = txt_selectedtext.text;             return;         }       }

reason:

if there nothing in textboxes, textbox.text return empty string ("") not null.

solution:

check against "" not null:

private void gethash() {     if (txt_sel1.text == "" && (txt_sel2.text == "" || txt_sel3.text == "" || txt_sel4.text == "" || txt_sel5.text == ""))     {         txt_sel1.text = txt_selectedtext.text;         return;     }      else if (txt_sel1.text != "" && (txt_sel2.text == "" || txt_sel3.text == "" || txt_sel4.text == "" || txt_sel5.text == ""))     {         txt_sel2.text = txt_selectedtext.text;         return;     }     ....     ....

edit: don't have ==true boolean variables. if statement checks against true default. use ! check against false:

if (hasvalue1 && (hasvalue2 || hasvalue3 || hasvalue4 || hasvalue5))     {         txt_sel1.text = txt_selectedtext.text;         return;     }      else if (hasvalue2 && (!hasvalue1 ||hasvalue3 || hasvalue4 || hasvalue5))     {                             txt_sel2.text = txt_selectedtext.text;             return;     }      else if (hasvalue3 && (!hasvalue1 || hasvalue2 || hasvalue4 || hasvalue5))     {                            txt_sel3.text = txt_selectedtext.text;             return;                     }     ....     ....

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