From af3473d8c79ea0f4e54ebd6f1f4299d0096af632 Mon Sep 17 00:00:00 2001 From: VinothSF5015 Date: Mon, 18 May 2026 15:53:32 +0530 Subject: [PATCH 1/2] 1024138 - Content Added --- ...s-custom-format-for-negative-number-formats.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md diff --git a/Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md b/Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md new file mode 100644 index 000000000..c3d9b69d7 --- /dev/null +++ b/Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md @@ -0,0 +1,15 @@ +--- +title: Why XlsIO Creates custom format for Negative number formats? | Syncfusion +description: Thid FAQ explains why XlsIO creates custom formats instead of built-in number formats for negative numbers. +platform: document-processing +control: XlsIO +documentation: UG +--- + +# Why XlsIO Creates custom format for Negative number formats? + +In Microsoft Excel, the Number category includes built‑in presets for formatting negative numbers (such as minus sign, red text, or parentheses). When you select these options directly in Excel, they are treated as standard built‑in formats, so they appear under the Number category. + +However, in Syncfusion XlsIO, these built‑in presets are not exposed directly. Instead, formatting is applied using format strings (for example, #,##0;(#,##0)). Although this produces the same visual result in Excel, it is still considered a custom format because it is defined explicitly as a string rather than selected from Excel’s internal presets. + +As a result, when you open the file in Excel, the format is shown under the Custom category. This behavior is expected and occurs because Excel distinguishes between built‑in formats and user‑defined format strings, even if they look identical. From bb009924fbdbb0e1fee828eb363026411bdadcee Mon Sep 17 00:00:00 2001 From: VinothSF5015 Date: Mon, 18 May 2026 16:05:52 +0530 Subject: [PATCH 2/2] Update why-xlsio-creates-custom-format-for-negative-number-formats.md --- ...y-xlsio-creates-custom-format-for-negative-number-formats.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md b/Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md index c3d9b69d7..46a490195 100644 --- a/Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md +++ b/Document-Processing/Excel/Excel-Library/NET/faqs/why-xlsio-creates-custom-format-for-negative-number-formats.md @@ -1,5 +1,5 @@ --- -title: Why XlsIO Creates custom format for Negative number formats? | Syncfusion +title: XlsIO Creates custom format for Negative number formats? | Syncfusion description: Thid FAQ explains why XlsIO creates custom formats instead of built-in number formats for negative numbers. platform: document-processing control: XlsIO