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TextBox.GetRectFromCharacterIndex Method (Int32, Boolean)

Returns the rectangle for the leading or trailing edge of the character at the specified index.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

public Rect GetRectFromCharacterIndex(
	int charIndex,
	bool trailingEdge
)

Parameters

charIndex
Type: System.Int32

The zero-based character index of the character for which to retrieve the rectangle.

trailingEdge
Type: System.Boolean

true to get the trailing edge of the character; false to get the leading edge of the character.

Return Value

Type: System.Windows.Rect
A rectangle for an edge of the character at the specified character index, or Empty if a bounding rectangle cannot be determined.

ExceptionCondition
ArgumentOutOfRangeException

charIndex is negative or is greater than the length of the content.

Because this method returns a rectangle that represents an edge of the character, the width of the rectangle is 0.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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