JeffreySu/WeiXinMPSDK · error · InvalidOperationException

无法找到静态方法: .

Error message

无法找到静态方法: {typeName}.{methodName}

What it means

After resolving the type, InvokeStaticMethod looks up a public static method by name via type.GetMethod(BindingFlags.Static | BindingFlags.Public). If no such method exists it throws InvalidOperationException naming Type.Method. Only public static parameterless-matching signatures can be found this way.

Solutions

1. Verify the method exists and is public static on the target type
2. Check the exact method name for the installed SDK version (renames across versions are common)
3. If the method is instance-based, obtain an instance first or use an API helper designed for it
4. If overloads exist, ensure GetMethod can disambiguate or adjust the invocation approach

Example fix

// before
InvokeWeixinApiHelper.InvokeFullMethod("Senparc.Weixin.MP.CommonApi.GetTokn", args); // typo
// after
InvokeWeixinApiHelper.InvokeFullMethod("Senparc.Weixin.MP.CommonApi.GetToken", args);

var t = Type.GetType(typeName) ?? AppDomain.CurrentDomain.GetAssemblies().Select(a => a.GetType(typeName, false)).FirstOrDefault(x => x != null);
if (t?.GetMethod(methodName, BindingFlags.Static | BindingFlags.Public) == null) throw new InvalidOperationException($"{typeName}.{methodName} is not a public static method");

try { var result = InvokeWeixinApiHelper.InvokeFullMethod(methodPath, args); }
catch (InvalidOperationException ex) when (ex.Message.Contains("无法找到静态方法")) { log.Error($"Method '{methodPath}' is not public static or was renamed"); }

When it happens

Trigger: The method name portion of fullMethodPath is wrong, the method is instance-level or non-public, or overloads exist that GetMethod cannot match unambiguously given the parameters.

Common situations: Calling an instance API (e.g. an OAuth API requiring an appSecret parameter object) through the static invoker, method renamed in a newer Senparc version, typo in method name from an MCP tool config.

Related errors

• 方法路径不能为空
• 无效的方法路径格式
• 无法找到类型
• 调用方法 . 时发生错误
• GetInstance 失败，此类型无法自动生成：

AI-assisted analysis of JeffreySu/WeiXinMPSDK@be573f6f94 (2026-09-12). Data as JSON: /api/errors/58ed6eb6bb164794. Report an issue: GitHub.

Appendix: source

Thrown at src/Senparc.Weixin.MCP.Server/InvokeWeixinApiHelper.cs:92

        try
        {
            var type = Type.GetType(typeName);
            if (type == null)
            {
                // 尝试从当前加载的程序集中查找类型
                foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
                {
                    type = assembly.GetType(typeName);
                    if (type != null) break;
                }
            }

            if (type == null)
                throw new InvalidOperationException($"无法找到类型: {typeName}");

            var method = type.GetMethod(methodName, BindingFlags.Static | BindingFlags.Public);
            if (method == null)
                throw new InvalidOperationException($"无法找到静态方法: {typeName}.{methodName}");

            return method.Invoke(null, parameters);
        }
        catch (Exception ex)
        {
            throw new InvalidOperationException($"调用方法 {typeName}.{methodName} 时发生错误", ex);
        }
    }

    /// <summary>
    /// 异步调用静态方法
    /// </summary>
    /// <param name="typeName">类型名称</param>
    /// <param name="methodName">方法名称</param>
    /// <param name="parameters">参数</param>
    /// <returns>方法执行结果</returns>
    public async Task<object> InvokeStaticMethodAsync(string typeName, string methodName, object[] parameters)
    {

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