TropicalSky Posts - Answer Overflow

TropicalSky

•Created by TropicalSky on 12/14/2024 in #help

BitBlt Not returning image

I am using the Windows API to call bitblt from gdi32.dll and when I call it it doesn't return an image just an empty bit map

public Bitmap GetScreenShot()
{
    try
    {
        Screen.BitBlt(_hdcDest, 0, 0, CaptureWidth, CaptureWidth, _hdcSrc, _zones[0], _zones[1], 0x00CC0020);
        return (Bitmap)_bitmap.Clone(); // Return a copy to avoid threading issues
    }
    catch (Exception ex)
    {
        Debug.WriteLine($"Capture Error: {ex.Message}");
        return null;
    }
}

public Bitmap GetScreenShot()
{
    try
    {
        Screen.BitBlt(_hdcDest, 0, 0, CaptureWidth, CaptureWidth, _hdcSrc, _zones[0], _zones[1], 0x00CC0020);
        return (Bitmap)_bitmap.Clone(); // Return a copy to avoid threading issues
    }
    catch (Exception ex)
    {
        Debug.WriteLine($"Capture Error: {ex.Message}");
        return null;
    }
}

public Grabber() {
// Takes half of the screen width and height and makes box in the middle
  _zones = CalculateGrabZone(HalfScreenX, HalfScreenY, GrabZone);

CaptureHeight = _zones[3] - _zones[1];
CaptureWidth = _zones[2] - _zones[0];


_Enabled = true;

_bitmap = new Bitmap(CaptureWidth, CaptureHeight);
_gDest = Graphics.FromImage(_bitmap);
_hdcDest = _gDest.GetHdc();
_hdcSrc = Screen.GetDC(IntPtr.Zero);
}

public Grabber() {
// Takes half of the screen width and height and makes box in the middle
  _zones = CalculateGrabZone(HalfScreenX, HalfScreenY, GrabZone);

CaptureHeight = _zones[3] - _zones[1];
CaptureWidth = _zones[2] - _zones[0];


_Enabled = true;

_bitmap = new Bitmap(CaptureWidth, CaptureHeight);
_gDest = Graphics.FromImage(_bitmap);
_hdcDest = _gDest.GetHdc();
_hdcSrc = Screen.GetDC(IntPtr.Zero);
}

1 replies

CC#

•Created by TropicalSky on 11/19/2024 in #help

✅ ASP.NET CORE Web Application

I am using ASP.NET CORE in my web application and when I am trying to upload a file to an input field even if I don't upload a file and just click the upload button my iis express server just crashes does anyone have any idea?

<div class="row">
    <div class="col-md-4">
        <form asp-action="Create">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="JobName" class="control-label">Job Name</label>
                <input asp-for="JobName" class="form-control" />
                <span asp-validation-for="JobName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="JobDescription" class="control-label">Job Description</label>
                <input asp-for="JobDescription" class="form-control" />
                <span asp-validation-for="JobDescription" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="JobStatus" class="control-label">Job Status</label>
                <input asp-for="JobStatus" class="form-control" />
                <span asp-validation-for="JobStatus" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Invoice" class="control-label"></label>
                <input asp-for="Invoice" class="form-control" type="file" accept=".pdf" />
            </div>
            <div class="form-group">
                <label asp-for="Customer" class="control-label"></label>
                <input asp-for="Customer" class="form-control" />
            </div>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

<div class="row">
    <div class="col-md-4">
        <form asp-action="Create">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="JobName" class="control-label">Job Name</label>
                <input asp-for="JobName" class="form-control" />
                <span asp-validation-for="JobName" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="JobDescription" class="control-label">Job Description</label>
                <input asp-for="JobDescription" class="form-control" />
                <span asp-validation-for="JobDescription" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="JobStatus" class="control-label">Job Status</label>
                <input asp-for="JobStatus" class="form-control" />
                <span asp-validation-for="JobStatus" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Invoice" class="control-label"></label>
                <input asp-for="Invoice" class="form-control" type="file" accept=".pdf" />
            </div>
            <div class="form-group">
                <label asp-for="Customer" class="control-label"></label>
                <input asp-for="Customer" class="form-control" />
            </div>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

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