Description


The component is used to input and output multiline text information.



Class: TdbMemo



Properties

 Property

 Type

 Description

 sqlValue

 String

 Returns the value of a component, for use in SQL queries. The property value already contains escape quotes. In case of empty value, it returns NULL string.

 example: SQLExecute ('INSERT INTO tablename (fieldname) VALUES ('+Form1.Memo1.sqlValue+')');

 Alignment

 TAlignment

 Determines how the text is aligned within the text edit control. Available values: taCenter, taRightJustify, taLeftJustify

 AutoSelect

 Boolean

 Determines whether all the text in the component is automatically selected when the component gets focus.

 BorderStyle

 TBorderStyle

 Determines whether the edit control has a single line border around the client area. Available values: bsSingle, bsNone

 CanFocus

 Boolean

  It checks if the component can get input focus, which is usually necessary before using the SetFocus method. If a component has Visible = False or Enabled = False property, or if the component is located on a parent component with those properties, using the SetFocus method will cause an error.


example: if Form1.Memo1.CanFocus then Form1.Memo1.SetFocus;

 CaretPosX

 Integer

 Indicates the X position of the caret in the client area of the memo.

 CaretPosY

 Integer

 Indicates the Y position of the caret in the client area of the memo.

 CharCase

 TEditCharCase

 Determines the case of the text within the edit control. Available values: ecNormal, ecUpperCase, ecLowerCase

 Color

 TColor

 Specifies the background color of the control. More info.

 Cursor

 TCursor

 Specifies the image used to represent the mouse pointer when it passes into the region covered by the control. More info.

 dbTable

 String

 Determines which database table a component belongs to.

 dbField

 String

 Determines which field of the database table this component belongs to.

 dbIncremSearch

 String

 Allows you to specify the name of the button on the current form with the "Search" or "SQL query" action, which will be automatically pressed when the user enters text for instant search.

 Enabled

 Boolean

 Controls whether the component responds to mouse, keyboard, and timer events.

 Focused

 Boolean

 Determines whether the control has input focus.

 Font

 TFont

 Allows you to set font name, size, color and style. More info.

 GetTextLen

 Integer

 Returns the length of the component's text.

 Hint

 String

 Hint contains the text string that appears when the user moves the mouse over the component., see also ShowHint

 Lines

 TStringList

 Class that represent a list of strings. More info.

 Lines[i]

 String

 Contains the individual lines of text in the memo component. Examle ShowMessage(Form1.Memo1.Lines[0]); // shows a message with the first line

 MaxLength

 Integer

 Specifies the maximum number of characters the user can enter into the memo component.

 Name

 String

 The name of the component.

 ReadOnly

 Boolean

 Determines whether the user can change the text of the memo component.

 ScrollBars

 TScrollStyle

 Determines whether the memo control has scroll bars. Available values: ssNone, ssHorizontal, ssVertical, ssBoth

 ShowHint

 Boolean

 Specifies whether to show the Help Hint when the mouse pointer moves over the component, see also Hint

 SelLength

 Integer

 Specifies the number of characters that are selected.

 SelStart

 Integer

 Specifies the position of the first selected character in the text. If there is no selected text, SelStart indicates the position of the cursor.

 SelText

 String

 Specifies the selected portion of the memo component's text.

 TabOrder

 Integer

 Indicates the position of the component in its parent's tab order. TabOrder is the order in which child components are visited when the user presses the Tab key.

 TabStop

 Boolean

 Determines whether the user can tab to a control. Use the TabStop to allow or disallow access to the control using the Tab key.

 Tag

 Integer

 Allows you to assign a number to a component for your own needs.

 TagString

 String

 Allows you to assign a string to a component for your own needs.

 Text

 String

 Contains a text string associated with the component.

 TextHint

 String

 A hint or message to be displayed when the Text property is empty.

 Visible

 Boolean

 Specifies whether the component appears onscreen.

 Left

 Integer

 Specifies the horizontal coordinate of the left edge of a component relative to its parent.

 Top

 Integer

 Specifies the vertical coordinate of the upper-left of a component relative to its parent.

 Width

 Integer

 Specifies the horizontal size of the component in pixels.

 Height

 Integer

 Specifies the vertical size of the component in pixels.




Methods

 Method

 Description

 procedure Clear

 Deletes all text from the memo component.

 procedure CopyToClipboard

 Copies the selected text in the memo component to the Clipboard.

 procedure CutToClipboard

 Copies the selected text to the Clipboard and then deletes the selection.

 procedure PasteFromClipboard

 Pastes the contents of the Clipboard into memo component, replacing the current selection.

 procedure SaveToFileUTF8 (const FileName: string)

 Saves the content of the component in a UTF-8 encoded text file.

 procedure SelectAll

 Selects all text in the memo component.

 procedure SetFocus

 Gives the input focus to the component.




Events

 Event

 Description

 OnClick

 Occurs when the user clicks the component.

 OnDoubleClick

 Occurs when the user double-clicks the left mouse button when the mouse pointer is over the component.

 OnEnter

 Occurs when a component receives the input focus.

 OnExit

 Occurs when the input focus shifts away from one component to another.

 OnKeyDown

 Occurs when a user presses any key while the form has focus.

 OnKeyPress

 Occurs when a key is pressed. Note that this procedure handles printable characters only.

 OnKeyUp

 Occurs when the user releases a key that was pressed.

 OnMouseDown

 Occurs when the user presses a mouse button with the mouse pointer over a component.

 OnMouseEnter

 Occurs when the user moves the mouse into a component.

 OnMouseLeave

 Occurs when the user moves the mouse outside of a component.

 OnMouseMove

 Occurs when the user moves the mouse pointer while the mouse pointer is over a component.

 OnMouseUp

 Occurs when the user releases a mouse button that was pressed with the mouse pointer over a component.

 OnDropFiles

 Occurs when user tries to drag and drop a file from explorer to a form. More info.