What is the best way to retrieve my chosen GridView rows and store them in a JavaScript variable?

Question

What is the best way to retrieve my chosen GridView rows and store them in a JavaScript variable?

Using ASP.NET C# MVC3 with razor templates, I have a question:

In my DevExpress GridView, I can select rows. How can I pass the selected rows into a JavaScript variable? Also, if I select multiple rows simultaneously, is there a way to get them in an array?

Edit: Thanks to a comment, I now have the following 'JQuery' function:

$(function () { // Delete function
    $('#select').click(function () {
        var Delete = confirm("Are you sure you want to delete the selected records?");
        if (Delete) {
            // Delete Function
            var test = ;
            alert(test);
        } else {
            // Nothing
        }
    });
});

I am trying to retrieve the Id of the selected rows and store it in the variable 'test'. I attempted to use GetSelectedFieldValuesCallback and GetSelectedFieldValues, but it is not working as expected. If anyone has an example they could provide, I would greatly appreciate it.

javascript asp.net-mvc gridview razor devexpress

Answer 1

Answer №1

One of the most fundamental operations of a grid seems to be lacking in examples, especially when it comes to sending rows back to the server for further processing.

The issue with using grid.GetSelectedFieldValues() is that it triggers a postback, requiring an additional postback to actually send the data back to the server.

A more elegant solution I discovered is to utilize grid.GetSelectedKeysOnPage(), which returns selected key fields as defined by settings.KeyFieldName = "Id".

This code snippet showcases how to set up your grid:

<script type="text/javascript">
    $(function () {
        $('#btn1').click(function () {
            simpleGrid.PerformCallback();
        });
    });

    function OnBeginCallback(s, e) {
        var selectedValues = s.GetSelectedKeysOnPage();
        e.customArgs["Id"] = "";
        for (var i = 0; i < selectedValues.length; i++) {
            e.customArgs["Id"] += selectedValues[i] + ',';
        }
    }
</script>

@Html.Partial("ProductsPartial", Model.Data)

<div id="btn1">
    btn
</div>

It's recommended to create your grid in a separate partial view, per the DevExpress documentation.

The "ProductsPartial" partial view structure is as follows:

@Html.DevExpress().GridView(
        settings =>
        {
            settings.Name = "simpleGrid";
            settings.KeyFieldName = "Id";
            // Additional settings and configuration options here 
        }).Bind(Model).GetHtml()

Lastly, you can process the data on the server side within your controller action:

public ActionResult Postback()
{
    String data = Request["Id"];
    // Process the data here
}

This approach allows for efficient server-side data processing.

Answer 2

One of the most fundamental operations of a grid seems to be lacking in examples, especially when it comes to sending rows back to the server for further processing.

The issue with using grid.GetSelectedFieldValues() is that it triggers a postback, requiring an additional postback to actually send the data back to the server.

A more elegant solution I discovered is to utilize grid.GetSelectedKeysOnPage(), which returns selected key fields as defined by settings.KeyFieldName = "Id".

This code snippet showcases how to set up your grid:

<script type="text/javascript">
    $(function () {
        $('#btn1').click(function () {
            simpleGrid.PerformCallback();
        });
    });

    function OnBeginCallback(s, e) {
        var selectedValues = s.GetSelectedKeysOnPage();
        e.customArgs["Id"] = "";
        for (var i = 0; i < selectedValues.length; i++) {
            e.customArgs["Id"] += selectedValues[i] + ',';
        }
    }
</script>

@Html.Partial("ProductsPartial", Model.Data)

<div id="btn1">
    btn
</div>

It's recommended to create your grid in a separate partial view, per the DevExpress documentation.

The "ProductsPartial" partial view structure is as follows:

@Html.DevExpress().GridView(
        settings =>
        {
            settings.Name = "simpleGrid";
            settings.KeyFieldName = "Id";
            // Additional settings and configuration options here 
        }).Bind(Model).GetHtml()

Lastly, you can process the data on the server side within your controller action:

public ActionResult Postback()
{
    String data = Request["Id"];
    // Process the data here
}

This approach allows for efficient server-side data processing.

Answer 3

Answer №2

I have discovered the solution I was seeking. The function below contains the necessary data:

$(function () {
    $('#select').click(function () {
        Grid.GetSelectedFieldValues("Id", OnGetSelectedFieldValues);
    });
});

function OnGetSelectedFieldValues(result) {
    for (var i = 0; i < result.length; i++){
            alert(result[i]);
        }
}

This information is valuable for individuals facing similar challenges.

Replace "Grid" in

Grid.GetSelectedFieldValues("Id", OnGetSelectedFieldValues);

with the name of your gridview, and modify "Id" according to the desired column value.

You can retrieve multiple data elements from a single row by adding another loop inside the

function OnGetSelectedFieldValues(result)

like this:

function OnGetSelectedFieldValues(result) {
    for (var i = 0; i < result.length; i++)
        for (var j = 0; j < result[i].length; j++) 
            alert(result[i][j]);
        }
}

Don't forget to adjust the getter accordingly as well

Grid.GetSelectedFieldValues("Id;ANOTHERCOLUMN", OnGetSelectedFieldValues);

This guidance may prove beneficial to others facing similar obstacles in the future.

Answer 4

I have discovered the solution I was seeking. The function below contains the necessary data:

$(function () {
    $('#select').click(function () {
        Grid.GetSelectedFieldValues("Id", OnGetSelectedFieldValues);
    });
});

function OnGetSelectedFieldValues(result) {
    for (var i = 0; i < result.length; i++){
            alert(result[i]);
        }
}

This information is valuable for individuals facing similar challenges.

Replace "Grid" in

Grid.GetSelectedFieldValues("Id", OnGetSelectedFieldValues);

with the name of your gridview, and modify "Id" according to the desired column value.

You can retrieve multiple data elements from a single row by adding another loop inside the

function OnGetSelectedFieldValues(result)

like this:

function OnGetSelectedFieldValues(result) {
    for (var i = 0; i < result.length; i++)
        for (var j = 0; j < result[i].length; j++) 
            alert(result[i][j]);
        }
}

Don't forget to adjust the getter accordingly as well

Grid.GetSelectedFieldValues("Id;ANOTHERCOLUMN", OnGetSelectedFieldValues);

This guidance may prove beneficial to others facing similar obstacles in the future.

What is the best way to retrieve my chosen GridView rows and store them in a JavaScript variable?

Answer №1

Answer №2

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