如何在输入字段中获取数据

Question

如果数据库中已存在数据，我无法在文本字段中获取数据。

问题：我想在页面加载时将数据放在输入标记的文本字段中。因此，编辑特定字段可能很容易。

@{
    Page.Title = "Edit Record | Student Registration System ";
    var id = Request.QueryString["id"];
    var info = UrlData[0];

    Validation.RequireField("Student_Reg_No", "Student Reg No is required.");

    if (info.IsEmpty())
    {
        Response.Redirect("~/default");
    }

    else if (IsPost) {
        var value = Request.Form["value"];
        var Student_Reg_No = Request.Form["Student_Reg_No"];

        if (Validation.IsValid()){
            // try{
            var db = Database.Open("site_data");
            var updateCommand = "Update site_data_table set Student_Reg_No =@0, Student_Name=@1 where Student_Reg_No=@0";
            db.Execute(updateCommand, Student_Reg_No);

            Response.Redirect(@Href("~/default"));
            @Href("~/ edit.cshtml   ", @value);
        }

    }
    else {

        var db1 = Database.Open("site_data");
        var row = db1.QuerySingle("SELECT * FROM site_data_table WHERE  Id =@0", info);

        var value = row.id;
        var Student_Reg_No = row.Student_Reg_No;
        <textarea>hi aasdasd</textarea>
    }
}

从这里开始HTML部分

<form method="post">
    <table>
        <input type="text" name="value" value="@Request.Form["value"]"
        <tr>
            <label for="Student_Reg_No">Student Reg No:</label> </br>
            <input type="text" name="Student_Reg_No" value="@Request.Form["Student_Reg_No"]" />
            <span class="error"> @Html.ValidationMessage("Student_Reg_No")   </span>
        </tr></br>

        <p><input type="submit" name="buttonSubmit" value="Add Movie" /></p>
    </table>
</form>