![]() Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As EventArgs)ĭim filePath As String = ĭim filename As String = Path.GetFileName(filePath)ĭim ext As String = Path.GetExtension(filename)ĭim size As Integer = ĭim fs As Stream = ĭim br As BinaryReader = New BinaryReader(fs)ĭim bytes As Byte() = br.ReadBytes(CType(fs.Length, Int32))ĭim sql As String = "insert into CarImgTbl(Name, Contyp,Size, Data)" & " values parameters As SqlParameter() = ĭim dt As DataTable = SelectFromDatabase(sql, parameters)ĭisplayImage.ImageUrl = "data:image/jpg base64," & Convert.ToBase64String(CType(dt.Rows(0)("Data"), Byte()))ĭisplayImage.AlternateText = "The Image has been found"ĭisplayImage.AlternateText = "The Image does not exist in DataBase"ĭisplayImage.AlternateText = "The input seems not an id " If e.Row.RowType = DataControlRowType.DataRow Thenĭim dr As DataRowView = CType(e.Row.DataItem, DataRowView)ĭim imageUrl As String = "data:image/jpg base64," & Convert.ToBase64String(CType(dr("Data"), Byte()))ĭim image1 As Image = CType(e.Row.FindControl("Image1"), Image) ![]() Protected Sub CarImgGridView_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Reader.readAsDataURL(input.files) // convert to base64 stringĬode behind: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Loadĭim sql As String = "SELECT * FROM CarImgTbl"ĬarImgGridView.DataSource = SelectFromDatabase(sql, Nothing) I constructed a demo to show how the gridview works with database and this simple demo also shows how to retrieve an image with an identifier. You could refer to below codes using VB.Net with webforms. Use a value (id) to retrieving an image.There must be an identifier for each image. In conclusion the authors found that in retrospective observer performance studies the use of a binary response or a semi-continuous rating scale led to consistent results in terms of performance as measured by sensitivity-specificity operating points.If I understand your requirements correctly, what you need might be: On average, radiologists performed similarly when using the two rating scales in that the average distance between the run in individual reader's binary operating point and their ROC curve was close to zero. Reader-specific differences ranged from -0.046 to 0.128 with an average width of the corresponding 95% confidence intervals of 0.2 and p-values ranging for individual readers from 0.050 to 0.966. Only one of the nine readers had a binary "operating point" that was statistically distant from the same reader's empirical ROC curve. There does not appear to be any systematic tendency of the readers towards a better performance when using either of the two rating approaches, namely four readers performed better using the semi-continuous rating scale, four readers performed better with the binary scale, and one reader had the point exactly on the empirical ROC curve. The vertical distance averaged over all readers was used to assess the proximity of the performance levels under the binary and ROC-type rating scale. The vertical distance, namely the difference in sensitivity levels at the same specificity levels, between the empirical ROC curve and the binary operating point were computed for each reader. Under an Institutional Review Board approved protocol nine experienced radiologists independently rated an enriched set of 155 examinations that they had not personally read in the clinic, mixed with other enriched sets of examinations that they had individually read in the clinic, using both a screening BI-RADS rating scale (recall/not recall) and a semi-continuous ROC type rating scale (0 to 100). The authors investigated radiologists, performances during retrospective interpretation of screening mammograms when using a binary decision whether to recall a woman for additional procedures or not and compared it with their receiver operating characteristic (ROC) type performance curves using a semi-continuous rating scale.
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