ASP.NET MVC 调用控制器方法 DevExpress

debugcn 发表于 Dev

杰森·比卡

我试图在控制器上调用一个方法，但它给了我一个空错误。我试图在代码上执行 getKeyValue 但它不起作用。我不知道我做错了什么。谢谢你的帮助。

控制器代码

public  ActionResult EditRecord(int id)
{
    int x = id;

    return PartialView("~/Views/FileMaintenance/Principal/EditPrincipal.cshtml", PrincipalInfo);
}

DevExpress GridView 代码

settings.Columns.Add(column =>
        {
            column.FieldName = "Unbound";
            column.Caption = "Action";
            column.UnboundType = DevExpress.Data.UnboundColumnType.Object;
            column.EditFormSettings.Visible = DevExpress.Utils.DefaultBoolean.True;
            column.ReadOnly = false;

            column.ColumnType = MVCxGridViewColumnType.ButtonEdit;
            column.SetDataItemTemplateContent((c) =>
            {

                Html.DevExpress().Button(b =>
                {
                    b.Name = "btnVE" + c.KeyValue;
                    b.Text = "V/E";
                    b.UseSubmitBehavior = false; // prevent default submit action
                    b.EnableClientSideAPI = true; // add this line if not sure
                    b.ClientSideEvents.Click = string.Format("function(s, e) {{ window.location = '{0}?key={1}'; }}",
                            DevExpressHelper.GetUrl(new { Controller = "ViewPrincipal", Action = "EditRecord" }),
                            c.KeyValue.ToString());
                }).GetHtml();
            });
        });

错误

参数字典包含“WMS_Web.Controllers.FileMaintenance.ViewPrincipalController”中方法“System.Web.Mvc.ActionResult EditRecord(Int32)”的不可为空类型“System.Int32”的参数“id”的空条目。可选参数必须是引用类型、可为空类型或声明为可选参数。参数名称：参数

杰古加多

您没有id在DevExpressHelper.GetUrl方法中提供参数。你需要设置它。在下面的示例中，我将值设置为 1。我不明白为什么当所需的是“id”时在查询字符串中放置“键”。将“key”更改为“id”也应该可以解决您的问题。

settings.Columns.Add(column =>     
{
        column.FieldName = "Unbound";
        column.Caption = "Action";
        column.UnboundType = DevExpress.Data.UnboundColumnType.Object;
        column.EditFormSettings.Visible = DevExpress.Utils.DefaultBoolean.True;
        column.ReadOnly = false;

        column.ColumnType = MVCxGridViewColumnType.ButtonEdit;
        column.SetDataItemTemplateContent((c) =>
        {

            Html.DevExpress().Button(b =>
            {
                b.Name = "btnVE" + c.KeyValue;
                b.Text = "V/E";
                b.UseSubmitBehavior = false; // prevent default submit action
                b.EnableClientSideAPI = true; // add this line if not sure
                b.ClientSideEvents.Click = string.Format("function(s, e) {{ window.location = '{0}'; }}",
                        DevExpressHelper.GetUrl(new { Controller = "ViewPrincipal", Action = "EditRecord", id = c.KeyValue.ToString() }));
            }).GetHtml();
        });
    });

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