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自定义文件保存对话框

SpreadJS 允许用户在 Spread Designer 组件中导入和保存文件时，自定义“保存文件”对话框的行为。此功能通过使用户能够根据个人喜好选择文件格式并指定文件名，增强了灵活性和效率。

默认行为

默认情况下，当 Spread 文件中有内容时，导入本地文件会提示是否保存当前内容。如果选择保存，保存的文件格式将与导入文件的格式相匹配。

示例：

  1. 导入一个带有内容的 Excel 文件

  2. 然后从本地系统导入一个 CSV 文件

  3. 出现提示信息，要求保存当前文件更改

  4. 点击“是”

  5. “保存文件”对话框显示 .xlsx 格式以保存当前文件

注意：如果之前没有导入任何文件，它会以 ssjson（默认）格式保存内容。

自定义文件保存格式

您可以使用 setData 方法中的 saveFileType 参数设置首选的文件保存格式。

目前，GC.Spread.Sheets.Designer.FileType 枚举中仅支持以下导出的文件类型：

格式

描述

JSON

指定文件保存格式为 json

Excel

指定文件保存格式为 .xlsx

CSV

指定文件保存格式为 .csv

SJS

指定文件保存格式为 .sjs

通过如下所示在 setData 方法中设置 saveFileType 参数来设置文件保存格式：

designer.setData("saveFileType", GC.Spread.Sheets.Designer.FileType.Excel);

下面的输出将生成，仅允许以 .xlsx 格式保存导入的 .csv 文件。

CustomizedSaveFiledialog.a018a8

但是，要恢复默认的导入/导出保存规则，可以将 saveFileType 设置为 undefined，如下所示：

designer.setData("saveFileType", undefined);

自定义文件名

默认情况下，导出文件时，“保存文件”对话框不显示任何文件名。您可以使用 setData 方法中的 saveFileName 参数设置自己的文件名。

designer.setData("saveFileName", "New File");

将生成如下输出：

image

type=warning

注意：

文件名必须遵循系统规则，例如：

  • 文件名应始终为字符串

  • 对于 Windows，最大字符长度应为 255

  • 避免使用符号字符，如 "<>"

  • 避免使用系统保留名称