How to change or set the path of material appearance with a newly created material .

[867902359]

Hello everyone, I am a programming novice. I want to set the appearance map of the newly created material in the secondary development of Revit2020, but the AppearanceAssetId is empty. Unfortunately, there is no example of the replacement of the newly created material appearance map on the Internet. Please give a case or point out my mistake.

[867902359]

[naveen.kumar.t]

Hi @867902359 ,

Are you looking for this one?

Material material;
using (AppearanceAssetEditScope editScope = new AppearanceAssetEditScope(doc))
    {
      Asset editableAsset = editScope.Start(material.AppearanceAssetId);
      AssetProperty assetProperty = editableAsset.FindByName("generic_diffuse");
      Asset connectedAsset = assetProperty.GetConnectedProperty(0) as Asset;
      if (connectedAsset.Name == "UnifiedBitmapSchema")
         {
           AssetPropertyString path = connectedAsset.FindByName(UnifiedBitmap.UnifiedbitmapBitmap) as AssetPropertyString;
            path.Value ="Image Path";
          }
          editScope.Commit(true);
      }

[naveen.kumar.t]

Ok, Now I understood your issue.

You are saying the sample code is not working for newly created material.

I am working on this. I will come back to you soon.

[naveen.kumar.t · Accepted solution]

Hi @867902359 ,

The newly created Material might not have an AppearanceAssetId set. Thus, it should be set explicitly.

I think the easier way to create new Material is to duplicate one and then modify it.

Please take a look at the below link

https://www.revitapidocs.com/2023/96d557aa-e446-49c5-11cd-59fda2459e82.htm 

[867902359]

oh! Thank you ！you've provided me with a new approach.

[KM_Yotsuha]

How can I change the color of Apperence?

[KM_Yotsuha]

[NGM_AiYo]

copy a new material and set it's color.

Material material = orimaterial.Duplicate(name);
material.Color = color;
material.AppearanceAssetId = orimaterial.AppearanceAssetId;
material.SurfaceForegroundPatternColor = color;

[KM_Yotsuha]

I want to change the color in Appearance Tab,the code you provided seem to modify color in Graphics only

[naveen.kumar.t]

Hi @KM_Yotsuha ,

please use the below sample code

Material mat;
if(mat!=null)
  {
    ElementId appearanceAssetId = mat.AppearanceAssetId;
    AppearanceAssetElement assetElem = doc.GetElement(appearanceAssetId) as AppearanceAssetElement;
    using (Transaction t2 = new Transaction(doc))
        {
          t2.Start("transaction name");
          using (AppearanceAssetEditScope editScope=new AppearanceAssetEditScope(assetElem.Document))
           {
             // returns an editable copy of the appearance asset
                Asset editableAsset = editScope.Start(assetElem.Id);
             // Diffuse image
                AssetPropertyDoubleArray4d genericDiffuseProperty = ediableAsset.FindByName("generic_diffuse") as AssetPropertyDoubleArray4d;
               genericDiffuseProperty.SetValueAsColor(new Autodesk.Revit.DB.Color(100,100,100));
                editScope.Commit(true);
            }
            t2.Commit();
      }
}

 Result

 

[KM_Yotsuha]

thank you so much~~

[KM_Yotsuha]

our company is in China, what is the parameter of FindByName method when the UI language is Chinese？

I tried  GetAllConnectedProperties Method ,and didn't get any names。

[KM_Yotsuha]

the code works well in English UI,  how can i apply to Chinese UI ? what string for FindByName method?

[KM_Yotsuha]

the code works in Chinese UI as well ,thank you~~~ no need to reply my privious post~~~