https://community.esri.com/t5/arcobjects-sdk-questions/creating-a-file-parameter-for-a-gp-tool/m-p/1147614#M20430 <P>I can see one problem with your code and that is you create&nbsp;pGXFileFilter and set it to file type "jxl" then you overwrite the same object setting the file type to "xls".</P> Thu, 24 Feb 2022 17:27:06 GMT DuncanHornby 2022-02-24T17:27:06Z https://community.esri.com/t5/arcobjects-sdk-questions/creating-a-file-parameter-for-a-gp-tool/m-p/1145430#M20425 <P>I created some ArcObjects code that creates a geoprocessing tool that creates a featureclass from some input files. The code creates a GP tool that works as it should, except for one problem: the GP parameter for the input files accepts all files when it is supposed to only accept files with the extension .jxl or .xls.</P><P>There is no documentation on how to do this, but below is the code snippet of what I wrote to create the input file parameter.&nbsp; I've also converted the tool to a Python tool (which has much better documentation) and it does filter input files to just the allowed ones. I assume the underlying objects are the same for the .Net SDK as for ArcPy, so there should be a way to get the .net authored tool to work as well. I also looked for clues in the Pro SDK, but came up with nothing since Pro doesn't even support creating GP tools with .net.</P><LI-CODE lang="csharp"> ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' parameter = New GPParameterClass() Dim inputType As IGPDataType = New DEFileTypeClass() Dim pGXFileFilter As IGxFileFilter = New GxFileFilterClass pGXFileFilter.AddFileType("jxl", "Trimble JXL Files", "") pGXFileFilter = New GxFileFilterClass pGXFileFilter.AddFileType("xls", "Excel Files", "") Dim pGXFilterInfo As IGxFilterInfo pGXFilterInfo = CType(inputType, IGxFilterInfo) pGXFilterInfo.OpenGxObjectFilters.Add(pGXFileFilter) pGXFilterInfo.SaveGxObjectFilters.Add(pGXFileFilter) Dim mvType As IGPMultiValueType = New GPMultiValueTypeClass() mvType.MemberDataType = inputType Dim mvValue As IGPMultiValue = New GPMultiValueClass() mvValue.MemberDataType = inputType parameter.Name = "input_files" parameter.DisplayName = "Input Files" parameter.ParameterType = esriGPParameterType.esriGPParameterTypeRequired parameter.Direction = esriGPParameterDirection.esriGPParameterDirectionInput parameter.DataType = CType(mvType, IGPDataType) parameter.Value = CType(mvValue, IGPValue) pParameters.Add(parameter) ' ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''</LI-CODE> Thu, 17 Feb 2022 23:41:47 GMT https://community.esri.com/t5/arcobjects-sdk-questions/creating-a-file-parameter-for-a-gp-tool/m-p/1145430#M20425 BerndtNording 2022-02-17T23:41:47Z https://community.esri.com/t5/arcobjects-sdk-questions/creating-a-file-parameter-for-a-gp-tool/m-p/1147614#M20430 <P>I can see one problem with your code and that is you create&nbsp;pGXFileFilter and set it to file type "jxl" then you overwrite the same object setting the file type to "xls".</P> Thu, 24 Feb 2022 17:27:06 GMT https://community.esri.com/t5/arcobjects-sdk-questions/creating-a-file-parameter-for-a-gp-tool/m-p/1147614#M20430 DuncanHornby 2022-02-24T17:27:06Z https://community.esri.com/t5/arcobjects-sdk-questions/creating-a-file-parameter-for-a-gp-tool/m-p/1147680#M20431 <P>Yes, you are right! But that error should still restrict the file types to just .xls. After correcting that error, the tool still allows any type of file.</P><P>&nbsp;</P> Thu, 24 Feb 2022 19:16:04 GMT https://community.esri.com/t5/arcobjects-sdk-questions/creating-a-file-parameter-for-a-gp-tool/m-p/1147680#M20431 BerndtNording 2022-02-24T19:16:04Z