Convert.ToDouble异常。输入字符串的格式不正确

Question

当我试图将一个数字如1. 1转换为双数时，我被抛出一个异常： "输入的字符串不是正确的格式。" 我不知道为什么会发生这种情况，因为我给的输入是正确的，而且我转换到的变量是一个双数。下面是代码。

控制器创建方法：

        [ValidateAntiForgeryToken]
        public ActionResult Create(IFormCollection collection)
        {
            try
            {
                Riskanalysis riskanalysis = new Riskanalysis()
                {
                    dateCreation = Convert.ToDateTime(collection["dateCreation"]),
                    userId = collection["userId"],
                    categoryId = Convert.ToInt32(collection["categoryId"]),
                    zoneId = Convert.ToInt32(collection["zoneId"]),
                    equipmentId = Convert.ToInt32(collection["equipmentId"]),
                    taskId = Convert.ToInt32(collection["taskId"]),
                    activity = collection["activity"],
                    action = collection["action"],
                    descriptionPotentialRisk = collection["descriptionPotentialRisk"],
                    dangerId = Convert.ToInt32(collection["dangerId"]),
                    consequenceId = Convert.ToInt32(collection["consequenceId"]),
                    dangerousEnergiesId = Convert.ToInt32(collection["dangerousEnergiesId"]),
                    preventionMeasures = collection["preventionMeasures"],
                    safetyProcedures = collection["safetyProcedures"],
                    preSeriousness = Convert.ToDouble(collection["preSeriousness"]),
                    preProbability = Convert.ToDouble(collection["preProbability"]),
                    preExposure = Convert.ToDouble(collection["preExposure"]),
                    preRiskDegree = Convert.ToDouble(collection["preRiskDegree"]),
                    preRiskCategory = Convert.ToDouble(collection["preRiskCategory"]),
                };

                DanoneRiskanalysisManager rm = new DanoneRiskanalysisManager();
                rm.InsertRiskanalysis(riskanalysis);

                return RedirectToAction(nameof(Create));
            }
            catch (Exception e)
            {
                return View();
            }
        } 

输入字段：

                <div class="form-group">
                    <label asp-for="preSeriousness" class="control-label">Pre seriousness:</label>
                    <input asp-for="preSeriousness" class="form-control" type="text" required/>
                    <span asp-validation-for="preSeriousness" class="text-danger"></span>
                </div>
                <div class="form-group">
                    <label asp-for="preProbability" class="control-label">Pre probability:</label>
                    <input asp-for="preProbability" class="form-control" type="text" required/>
                    <span asp-validation-for="preProbability" class="text-danger"></span>
                </div>
                <div class="form-group">
                    <label asp-for="preExposure" class="control-label">Pre exposure:</label>
                    <input asp-for="preExposure" class="form-control" type="text" required/>
                    <span asp-validation-for="preExposure" class="text-danger"></span>
                </div>
                <div class="form-group">
                    <label asp-for="preRiskDegree" class="control-label">Pre risk degree:</label>
                    <input asp-for="preRiskDegree" class="form-control" type="text" required/>
                    <span asp-validation-for="preRiskDegree" class="text-danger"></span>
                </div>
                <div class="form-group">
                    <label asp-for="preRiskCategory" class="control-label">Pre risk category:</label>
                    <input asp-for="preRiskCategory" class="form-control" type="text" required/>
                    <span asp-validation-for="preRiskCategory" class="text-danger"></span>
                </div>

有谁知道原因是什么，或者要去哪里找？

已经谢谢你了

Answer 1

你检查过locale了吗？可能是数字格式没有使用". "作为小数分隔符，试着输入", "而不是"."。

更多信息请看:support.microsoft