Asp.net mvc 具有viewbag数据的linq

控制器

ViewBag.Subdivison = new SelectList(db.Retention_Model_Predictions_DS_Manual.Select(m => m.Underwriter_Name).Distinct(), "Underwriter_Name", "Underwriter_Name"); 

@Html.DropDownList("Underwriter_Name", null, "Please Select", htmlAttributes: new { @class = "form-control" })

查看

ViewBag.Subdivison = new SelectList(db.Retention_Model_Predictions_DS_Manual.Select(m => m.Underwriter_Name).Distinct(), "Underwriter_Name", "Underwriter_Name"); 

@Html.DropDownList("Underwriter_Name", null, "Please Select", htmlAttributes: new { @class = "form-control" })

在控制器中发现错误

ViewBag.Subdivison = new SelectList(db.Retention_Model_Predictions_DS_Manual.Select(m => m.Underwriter_Name).Distinct(), "Underwriter_Name", "Underwriter_Name"); 

@Html.DropDownList("Underwriter_Name", null, "Please Select", htmlAttributes: new { @class = "form-control" })

“错误=无法计算表达式。不支持操作。未知错误：0x80070057。”

视图中发现错误

ViewBag.Subdivison = new SelectList(db.Retention_Model_Predictions_DS_Manual.Select(m => m.Underwriter_Name).Distinct(), "Underwriter_Name", "Underwriter_Name"); 

@Html.DropDownList("Underwriter_Name", null, "Please Select", htmlAttributes: new { @class = "form-control" })

没有类型为“IEnumerable”的ViewData项具有键“Undersier\u Name”

我不这么认为

ViewBag.Subdivison = new SelectList(db.Retention_Model_Predictions_DS_Manual.Select(m => m.Underwriter_Name).Distinct(), "Underwriter_Name", "Underwriter_Name");

是控制器中出现错误的原因

但是，您在视图中收到的错误是因为您的ViewBag名称是

Subdivison

，但您正在调用

unsumer\u name

，作为DropDownList方法中的第一个参数

将视图代码更改为：

@Html.DropDownList("Subdivison", null, "Please Select", htmlAttributes: new { @class = "form-control" })

你拼写错了。。你错过了一个“我”。细分

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希望这有帮助。

控制器中的错误是由您上面写的行引起的？