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IDebugDocumentText2::GetText

  • Artikkeli

Applies to: yesVisual Studio noVisual Studio for Mac

Note

This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

Retrieves the text from the specified position in the document.

Syntax

HRESULT GetText(
    TEXT_POSITION pos,
    ULONG         cMaxChars,
    WCHAR*        pText,
    ULONG*        pcNumChars
);

int GetText(
    eumn_TEXT_POSITION pos,
    uint               cMaxChars,
    IntPtr             pText,
    out uint           pcNumChars
);

Parameters

pos
[in] A TEXT_POSITION structure that indicates the location of the text to be retrieved.

cMaxChars
[in] The maximum number of characters of the text to be retrieved.

pText
[in, out] A pointer to a buffer that is to be filled in with the desired text. This buffer must be able to contain at least cMaxChars number of wide characters.

pcNumChars
[out] Returns the number of characters actually retrieved.

Return Value

If successful, returns S_OK; otherwise, returns an error code.

Example

This example shows how this method can be called from C#.

using System.Runtime.Interop.Services;
using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Debugger.Interop;

namespace Mynamespace
{
    class MyClass
    {
        string GetDocumentText(IDebugDocumentText2 pText, TEXT_POSITION pos)
        {
            string documentText = string.Empty;
            if (pText != null)
            {
                uint numLines = 0;
                uint numChars = 0;
                int hr;
                hr = pText.GetSize(ref numLines, ref numChars);
                if (ErrorHandler.Succeeded(hr))
                {
                    IntPtr buffer = Marshal.AllocCoTaskMem((int)numChars * sizeof(char));
                    uint actualChars = 0;
                    hr = pText.GetText(pos, numChars, buffer, out actualChars);
                    if (ErrorHandler.Succeeded(hr))
                    {
                        documentText = Marshal.PtrToStringUni(buffer, (int)actualChars);
                    }
                    Marshal.FreeCoTaskMem(buffer);
                }
            }
            return documentText;
        }
    }
}

See also