hi in linux my project has follow errors about wkhtmltopdf-dotnet

[HakanL]

Most likely you need to install some additional dependencies. Try to terminal into the container and temporarily install the libwkhtmltox library and see what it needs.

Here's the dockerfile I'm using for reference:

# App image (use the Debian-based based since wkhtmltopdf has dependencies that aren't readily available in Alpine)
FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 AS final

# Install dependencies
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        zlib1g \
		libgdiplus \
        libc6-dev \
		ca-certificates \
		fontconfig \
		fontconfig-config \
		fonts-dejavu-core \
		libbsd0 \
		libexpat1 \
		libfontconfig1 \
		libfontenc1 \
		libfreetype6 \
		libjpeg62-turbo \
		libpng16-16 \
		libssl1.1 \
		libx11-6 \
		libx11-data \
		libxau6 \
		libxcb1 \
		libxdmcp6 \
		libxext6 \
		libxrender1 \
		ucf \
		x11-common \
		xfonts-75dpi \
		xfonts-base \
		xfonts-encodings \
		xfonts-utils \
     && rm -rf /var/lib/apt/lists/*

# Builder image to run the clean up in and use as a copy base
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS builder1
WORKDIR /sln

# Copy across all source files
COPY . .

# Delete files we don't need so Docker can capture this and we can use it as a copy source later
RUN find . -type f ! \( -name "*.*proj" -o -name "*.sln" -o -name "NuGet.config" \) -delete && \
	find . -depth -type d -exec rmdir {} \; 2>/dev/null

# Create a new stage based on the cleaned-up source
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS builder
WORKDIR /sln

# Install dependencies
RUN wget -qO- https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > microsoft.asc.gpg \
	&& mv microsoft.asc.gpg /etc/apt/trusted.gpg.d/ \
	&& wget -q https://packages.microsoft.com/config/debian/10/prod.list \
	&& mv prod.list /etc/apt/sources.list.d/microsoft-prod.list \
	&& chown root:root /etc/apt/trusted.gpg.d/microsoft.asc.gpg \
	&& chown root:root /etc/apt/sources.list.d/microsoft-prod.list

RUN apt-get update \
    && apt-get install -y --no-install-recommends \
		apt-transport-https \
	&& apt-get update \
	&& apt-get install -y --no-install-recommends \
		dotnet-sdk-3.1 \
     && rm -rf /var/lib/apt/lists/*

# Copy out all the project files necessary for dotnet restore from builder1
COPY --from=builder1 /sln .

RUN dotnet restore

# Copy across the files again for the full build
COPY ./test ./test
COPY ./src ./src

RUN dotnet build -c Release "./src/ServiceHostDocumentGenerator/ServiceHostDocumentGenerator.csproj"

RUN dotnet publish "./src/ServiceHostDocumentGenerator/ServiceHostDocumentGenerator.csproj" \
    -c Release -o "dist" --no-restore


# App image
FROM final
WORKDIR /app
EXPOSE 80
COPY --from=builder /sln/dist .
ENTRYPOINT ["dotnet", "ServiceHostDocumentGenerator.dll"]

[HakanL]

It could be a dependency for libwkhtmltox. Try to install that library directly (outside .NET) and see if ti works.

[ClementeGao]

the project run in the docker how install the library

[ClementeGao]

ok thank you very much l will try it

[ClementeGao]

do you have easy way to solve it ?

[HakanL]

Not sure what you mean, this is common when you work with dockers, the base image may not have all the dependencies installed, so you have to add those to your Dockerfile. But I provided an example above that includes everything you need.