Read From Csv and Display in Repeater C#

This activeness uploads the rows in a CSV file to the specified view. You tin utilize Import to:

• Add one or more new records to an AppSheet table.

• Update i or more than existing records in an AppSheet table.

• Both add together one or more than new records to an AppSheet table and update one or more other existing records in an AppSheet tabular array.

Invoking an "Import a CSV File for This View" Action

In one case you have created an Import action as described in the sections below, you can invoke it as follows:

1. Open the awarding in a desktop browser. Import only works when the app is running on a desktop browser, non when it is running on a iOS or Android device.

2. Navigate to the tabular array view having the Import action.

3. Click the Import push. (If you practice not see the Import push button, y'all may need to edit the Import activeness and choose a different Prominence on the Advent tab.)

4. Use the File Open dialog which is displayed to select the CSV file you wish to import.

5. An Import CSV Started dialog similar the post-obit volition exist displayed.
   

   

6. When the Import finishes successfully, an Import CSV Finished dialog similar the following will be displayed.

7. If an error occurs, an Import CSV Failed dialog like the following volition be displayed. Refer to the Troubleshooting guidelines department below.

Choosing a CSV File Size

We impose a 4 infinitesimal time limit when importing a CSV file. We do this to ensure that all users get fair access to the arrangement. Please keep this time limit in mind when creating your CSV file.

The post-obit piece of work all counts towards the time limit:

1. The time to compute initial value expressions and virtual field app formulas.

2. The fourth dimension to check and update Change fields.

3. The fourth dimension to verify that each field contain a value of the advisable type.

4. The time to enforce Required, Required_If, and Valid_If conditions.

5. The time to add or update the records to the table. This fourth dimension depends, in office, on which provider the table uses. For SQL providers we batch read and write operations for efficiency.

6. The fourth dimension to re-read the added or updated records to obtain after images, if workflow rules are present.

7. The time to process Workflow rules, if any.
   

Equally you lot can meet, the time required to import a CSV file depends on a lot of factors and tin be hard to predict. In full general, the more rows and columns in the CSV file, the longer the import time. We propose you lot starting time with a batch size of a few hundred to a few thousand records, and experiment to see how long CSV Import takes for your table. Then adjust your batch size to stay comfortably within the time limit.

Creating the "Import a CSV File for This View" Activity

Do the post-obit to create a "Import a CSV File for This View" activeness:

1. In the Editor, go to the Data > Tables tab and expand the table you wish to import into.

2. Ensure both Adds and Updates are checked for the Are updates allowed? property.

3. In the Editor, go to the Behavior > Actions tab.

4. Click New Activity.

5. Give the activeness a meaningful name past setting the Action name belongings.

6. Employ the For a tape of this table dropdown to select the table in which the records should be added or updated.

7. In the Practise this dropdown select "App: import a CSV file for this view (not a row-level activity)"

8. Set the CSV file locale property equally described in configure the CSV locale.

9. Expand the Advent tab.

10. Give the Import button a meaningful name past setting the Display proper noun property.

11. Select an Action icon for the Import button. You tin can enter "import" in the search window and hit Enter to narrow downward the listing of icons. One of the icons showing an arrow going into a document is often a good choice.

12. Select a Prominence to control how prominently the Import push button is displayed.

13. Click Salvage.

CSV File Format

Each row in the CSV file corresponds with a record to be added or updated in the table, except for the first row which must be a header row.

Each column in the CSV file corresponds with a field in the table. The header row contains the field names of the columns in the tabular array. The column names in the CSV header row must exactly match the field names in the table including capitalization. The columns in the CSV file may occur in any order. They need not match the field order of the table.

It is not necessary to include a cavalcade in the CSV file for every field in the table. This is explained further below.

CSV File with Unicode Data

If your CSV file contains Unicode data, make certain the file is save in Unicode format. For example, on Microsoft Windows yous can:

1. Open the CSV file in Notepad.

2. From the File menu select Salve As...

3. In the Encoding dropdown select any of the UTF values such as UTF-8 or UTF-8 with BOM (Byte Order Marking).

4. Click Save

For example, this is necessary if:

The file contains any of the five French emphasis marks:

• ç – la cédille (the cedilla)

• é – l'accent aigu (the acute accent)

• â/ê/î/ô/û – l'accent circonflexe (the circumflex)

• à/è/ì/ò/ù – l'accent grave (the grave accent)

• ë/ï/ü – le tréma (the trema)

The file contains Greek, Russian, or Arabic characters.

• Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ/ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, and Ω ω. (Greek characters)

• А, Б, В, Г, Д, Е, Ё, Ж, З, И, Й, К, Л, М, Н, О, П, Р, С, Т, У, Ф, Х, Ц, Ч, Ш, Щ, Ъ, Ы, Ь, Э, Ю, Я (Russian characters)

Adding Records

Each CSV Row value must normally include the key field value of the tape being added. Yet, if the key field contains an "Initial value", you can omit the primal field value considering the system will initialize the key field to the "Initial value". For example, yous should omit the primal field value when the cardinal field has an "Initial value" of UNIQUEID() or RandBetween().

If no CSV column is present for a field of the tabular array, the tabular array field'due south "Initial value" will be used to give the field a value.

When a Record is Added

1. All fields are initialized to initial values and all app formulas are computed.

2. The field values you specify in the CSV row are applied.

3. App formulas are computed and change fields are updated.

4. Required, Required_If, and Valid_If atmospheric condition are enforced.

5. The record is added to the table.

6. Workflow rules, if any, are invoked.

Updating Records

Each CSV row must specify the cardinal value of a table record to exist updated.

The CSV file should contain a column for every updatable field in the table except Virtual and Alter columns. If you include a Virtual or Change column, the cavalcade value you lot specify volition be ignored. If the CSV file omits an updatable cavalcade, the field's "Initial value" is used.

When a Record is Updated

1. All fields are initialized to initial values and all app formulas are computed.

2. The field values you specify in the CSV row are applied.

3. App formulas are computed and change fields are updated.

4. Required, Required_If, and Valid_If conditions are enforced.

5. The record is updated in the tabular array.

6. Workflow rules, if any, are invoked.

CSV Row Information Values

Each column's values must be suitable for its column blazon.

The value for a Yes/No column tin exist specified in several equivalent ways.
All of the following values are equivalent ways of specifying "True".
Field values within quotes are case insensitive. For case, "TRUE, "True", "truthful", "True" are equivalent.

          "MyBool": true            
"MyBool": "True"
"MyBool": "true"
"MyBool": "T"
"MyBool": "t"            
"MyBool": "Yes"
"MyBool": "yes"            
"MyBool": "Y"
"MyBool": "y"        

All of the following values are equivalent ways of specifying "False".
Field values within quotes are instance insensitive. For example, "Fake, "Faux", "false", "FalsE" are equivalent.

          "MyBool": false            
"MyBool": "False"
"MyBool": "false"
"MyBool": "F"
"MyBool": "f"            
"MyBool": "No"
"MyBool": "no"            
"MyBool": "N"
"MyBool": "n"        

Private Tables

CSV Import can be used to import data into Individual tables.

The app creator must first create an "Import a CSV File for This View" Action for the Private tabular array, every bit described above.

The app user can then sign-in to Appsheet using their account, invoke the application, and invoke the "Import a CSV File for This View" Action equally described above. Appsheet volition locate the Private table belonging to the signed-in user and import the CSV file contents into that Private table.

Troubleshooting

If CSV import fails see Troubleshooting CSV Import.

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Source: https://help.appsheet.com/en/articles/5340448-import-a-csv-file-for-this-view

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