统计C盘各种扩展名文件大小总和及数量的PowerShell脚本
本脚本只统计了一半文件的大小数量,其它部分系统文件无访问权限。需要在 TrustedInstaller 权限下运行才能访问。如何获取 TrustedInstaller 权限。
# 统计C盘各种扩展名文件大小总和及数量的PowerShell脚本
$extSizes = @{}
$totalFiles = 0
$stopwatch = [System.Diagnostics.Stopwatch]::StartNew()# 扫描文件并统计
Get-ChildItem -Path 'C:\' -File -Recurse -ErrorAction SilentlyContinue | ForEach-Object {$totalFiles++# 每处理5000个文件显示进度if ($totalFiles % 5000 -eq 0) {$elapsed = $stopwatch.Elapsed.ToString("mm\:ss")Write-Progress -Activity "扫描文件 (已处理 $totalFiles 个)" `-Status "当前: $([System.IO.Path]::GetFileName($_.FullName))" `-PercentComplete (($totalFiles % 100000)/1000)}$ext = $_.Extension.ToLower()if (-not $ext) { $ext = '_no_extension_' }if (-not $extSizes.ContainsKey($ext)) {$extSizes[$ext] = @{TotalSize = 0LCount = 0}}$extSizes[$ext].TotalSize += $_.Length$extSizes[$ext].Count++
}# 转换大小格式的函数
function Format-FileSize {param([long]$size)switch ($size) {{ $_ -ge 1TB } { return [math]::Round($_ / 1TB, 1).ToString('0.#') + "T" }{ $_ -ge 1GB } { return [math]::Round($_ / 1GB, 1).ToString('0.#') + "G" }{ $_ -ge 1MB } { return [math]::Round($_ / 1MB, 1).ToString('0.#') + "M" }{ $_ -ge 1KB } { return [math]::Round($_ / 1KB, 1).ToString('0.#') + "K" }default { return "$_ B" }}
}# 格式化数量显示(添加千位分隔符)
function Format-Count {param([int]$count)return $count.ToString("N0")
}# 准备结果数据
$results = @()
foreach ($ext in $extSizes.Keys) {$results += [PSCustomObject]@{Extension = $extSize = Format-FileSize -size $extSizes[$ext].TotalSizeCount = Format-Count -count $extSizes[$ext].CountTotalBytes= $extSizes[$ext].TotalSize}
}# 计算总扫描时间
$scanTime = $stopwatch.Elapsed.ToString("hh\:mm\:ss")# 输出结果表格(按总大小降序)
$sortedResults = $results | Sort-Object TotalBytes -Descending# 显示统计摘要
Clear-Host
Write-Host "`n文件扩展名统计报告 (C:\)" -ForegroundColor Cyan
Write-Host "扫描文件总数: $($totalFiles.ToString('N0'))" -ForegroundColor Yellow
Write-Host "扫描耗时: $scanTime" -ForegroundColor Yellow
Write-Host "发现扩展名类型: $($extSizes.Count)`n" -ForegroundColor Yellow# 格式化表格输出
$sortedResults | Format-Table @(@{Label="扩展名"; Expression={$_.Extension}; Width=12; Alignment="Left"}@{Label="大小"; Expression={$_.Size}; Width=10; Alignment="Right"}@{Label="数量"; Expression={$_.Count}; Width=15; Alignment="Right"}
) -AutoSize# 保存结果到CSV(修复数字扩展名问题)
$timestamp = Get-Date -Format "yyyyMMdd-HHmmss"
$csvPath = Join-Path -Path $env:TEMP -ChildPath "FileSizeSummary_$timestamp.csv"# 创建CSV内容(修复数字扩展名问题)
$csvData = $sortedResults | ForEach-Object {# 在数字扩展名前添加单引号防止Excel转换$fixedExtension = if ($_.Extension -match '^\.\d+$') {"'" + $_.Extension} else {$_.Extension}[PSCustomObject]@{Extension = $fixedExtensionSize = $_.SizeCount = $_.Count}
}$csvData | Export-Csv -Path $csvPath -NoTypeInformation -Encoding UTF8
Write-Host "`n结果已保存到: $csvPath" -ForegroundColor Green# 额外提示Excel处理建议
Write-Host "`n注意: 数字扩展名(如 .1, .2)在CSV中已添加前缀单引号'" -ForegroundColor Magenta
Write-Host "在Excel中打开时请检查扩展名格式是否正确,若仍不正确请手动设置格式:" -ForegroundColor Magenta
Write-Host "1. 全选扩展名列" -ForegroundColor Yellow
Write-Host "2. 右键选择'设置单元格格式'" -ForegroundColor Yellow
Write-Host "3. 选择'文本'格式" -ForegroundColor YellowRead-Host "按 Enter 退出"
# 统计C盘各种扩展名文件大小总和及数量的PowerShell脚本
$extSizes = @{}
$totalFiles = 0
$stopwatch = [System.Diagnostics.Stopwatch]::StartNew()
# 扫描文件并统计
Get-ChildItem -Path 'C:\' -File -Recurse -ErrorAction SilentlyContinue | ForEach-Object {
$totalFiles++
# 每处理5000个文件显示进度
if ($totalFiles % 5000 -eq 0) {
$elapsed = $stopwatch.Elapsed.ToString("mm\:ss")
Write-Progress -Activity "扫描文件 (已处理 $totalFiles 个)" `
-Status "当前: $([System.IO.Path]::GetFileName($_.FullName))" `
-PercentComplete (($totalFiles % 100000)/1000)
}
$ext = $_.Extension.ToLower()
if (-not $ext) { $ext = '_no_extension_' }
if (-not $extSizes.ContainsKey($ext)) {
$extSizes[$ext] = @{
TotalSize = 0L
Count = 0
}
}
$extSizes[$ext].TotalSize += $_.Length
$extSizes[$ext].Count++
}
# 转换大小格式的函数
function Format-FileSize {
param([long]$size)
switch ($size) {
{ $_ -ge 1TB } { return [math]::Round($_ / 1TB, 1).ToString('0.#') + "T" }
{ $_ -ge 1GB } { return [math]::Round($_ / 1GB, 1).ToString('0.#') + "G" }
{ $_ -ge 1MB } { return [math]::Round($_ / 1MB, 1).ToString('0.#') + "M" }
{ $_ -ge 1KB } { return [math]::Round($_ / 1KB, 1).ToString('0.#') + "K" }
default { return "$_ B" }
}
}
# 格式化数量显示(添加千位分隔符)
function Format-Count {
param([int]$count)
return $count.ToString("N0")
}
# 准备结果数据
$results = @()
foreach ($ext in $extSizes.Keys) {
$results += [PSCustomObject]@{
Extension = $ext
Size = Format-FileSize -size $extSizes[$ext].TotalSize
Count = Format-Count -count $extSizes[$ext].Count
TotalBytes= $extSizes[$ext].TotalSize
}
}
# 计算总扫描时间
$scanTime = $stopwatch.Elapsed.ToString("hh\:mm\:ss")
# 输出结果表格(按总大小降序)
$sortedResults = $results | Sort-Object TotalBytes -Descending
# 显示统计摘要
Clear-Host
Write-Host "`n文件扩展名统计报告 (C:\)" -ForegroundColor Cyan
Write-Host "扫描文件总数: $($totalFiles.ToString('N0'))" -ForegroundColor Yellow
Write-Host "扫描耗时: $scanTime" -ForegroundColor Yellow
Write-Host "发现扩展名类型: $($extSizes.Count)`n" -ForegroundColor Yellow
# 格式化表格输出
$sortedResults | Format-Table @(
@{Label="扩展名"; Expression={$_.Extension}; Width=12; Alignment="Left"}
@{Label="大小"; Expression={$_.Size}; Width=10; Alignment="Right"}
@{Label="数量"; Expression={$_.Count}; Width=15; Alignment="Right"}
) -AutoSize
# 保存结果到CSV(修复数字扩展名问题)
$timestamp = Get-Date -Format "yyyyMMdd-HHmmss"
$csvPath = Join-Path -Path $env:TEMP -ChildPath "FileSizeSummary_$timestamp.csv"
# 创建CSV内容(修复数字扩展名问题)
$csvData = $sortedResults | ForEach-Object {
# 在数字扩展名前添加单引号防止Excel转换
$fixedExtension = if ($_.Extension -match '^\.\d+$') {
"'" + $_.Extension
} else {
$_.Extension
}
[PSCustomObject]@{
Extension = $fixedExtension
Size = $_.Size
Count = $_.Count
}
}
$csvData | Export-Csv -Path $csvPath -NoTypeInformation -Encoding UTF8
Write-Host "`n结果已保存到: $csvPath" -ForegroundColor Green
# 额外提示Excel处理建议
Write-Host "`n注意: 数字扩展名(如 .1, .2)在CSV中已添加前缀单引号'" -ForegroundColor Magenta
Write-Host "在Excel中打开时请检查扩展名格式是否正确,若仍不正确请手动设置格式:" -ForegroundColor Magenta
Write-Host "1. 全选扩展名列" -ForegroundColor Yellow
Write-Host "2. 右键选择'设置单元格格式'" -ForegroundColor Yellow
Write-Host "3. 选择'文本'格式" -ForegroundColor Yellow
Read-Host "按 Enter 退出"
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