GridView - Batch Edit - How to use the upload control in Batch Edit mode

This example illustrates how to use the upload control in Batch edit mode. Note that all files are stored in memory until you call the update method.

1) Place UploadControl into the column's EditItem template:

[C#]
c.SetEditItemTemplateContent(container=>{Html.DevExpress().UploadControl(ucSettings=>{ucSettings.Name="uc";ucSettings.CallbackRouteValues=new{Controller="Home",Action="UploadControlUploadFile"};ucSettings.UploadMode=UploadControlUploadMode.Advanced;ucSettings.Width=Unit.Percentage(100);ucSettings.ClientSideEvents.TextChanged="OnTextChanged";ucSettings.ClientSideEvents.FileUploadComplete="OnFileUploadComplete";}).Render();});

2) Handle the grid's client-side BatchEditStartEditing event to set the grid's cell values to the upload control. It is possible to get the focused cell value using the e.rowValues property:

[JScript]
function OnBatchStartEditing(s, e){
    browseClicked = false;
    $("#hf").val(e.visibleIndex);var fileNameColumn = s.GetColumnByField("FileName");if(!e.rowValues.hasOwnProperty(fileNameColumn.index))return;var cellInfo = e.rowValues[fileNameColumn.index];

    setTimeout(function(){
        SetUCText(cellInfo.value);}, 0);}

3) Handle the grid's client-side BatchEditConfirmShowing event to prevent data loss on the upload control's callbacks:

[JScript]
function OnBatchConfirm(s, e){
    e.cancel = browseClicked;}

This "browseClicked" flag is set to true when the upload control starts uploading a file and to false when the file has been uploaded or the user starts editing another cell.

4) Handle the upload control's client-side TextChanged and FileUploadComplete events to automatically upload the selected file and update the cell value after:

[JScript]
function OnFileUploadComplete(s, e){
    gridView.batchEditApi.SetCellValue($("#hf").val(), "FileName", e.callbackData);
    gridView.batchEditApi.EndEdit();}function OnTextChanged(s, e){if(s.GetText()){
        browseClicked = true;
        s.Upload();}}

5) Handle the upload control's FileUploadComplete event to store the uploaded file in the session:

[C#]
publicActionResultUploadControlUploadFile(){varvisibleIndex=Convert.ToInt32(Request.Params["hf"]);UploadControlExtension.GetUploadedFiles("uc",null,(s,e)=>{varname=e.UploadedFile.FileName;e.CallbackData=name;if(Helper.Files.ContainsKey(visibleIndex))Helper.Files[visibleIndex]=e.UploadedFile.FileBytes;elseHelper.Files.Add(visibleIndex,e.UploadedFile.FileBytes);});returnnull;}

Now you can access all the uploaded files in the Batch action method. Clear the session storage after you have updated the files.

See also:
T191652: ASPxGridView - Batch Edit - How to use the upload control in Batch Edit mode